ФИЛЬТР, СОДЕРЖАЩИЙ ОБЪЕДИНЕННЫЙ КАТАЛИЗАТОР ДЛЯ ОКИСЛЕНИЯ САЖИ И NH-SCR КАТАЛИЗАТОР

Изобретение относится к фильтру с протеканием через стенки для фильтрования материала в виде частиц от протекающих отработанных газов и к способу его получения. Фильтр содержит катализатор для преобразования твердого углерода в материал в виде частиц с помощью кислорода и для селективного восстановления оксидов азота в отработанных газах с помощью азотистого восстановителя, причем катализатор содержит оксид церия и вольфрам. Изобретение также относится к выхлопной системе для транспортного средства, причем система содержит источник азотистого восстановителя, инжекционные средства для инжекции азотистого восстановителя в протекающих отработанных газах и фильтр с протеканием через стенки, расположенный после инжекционных средств. Технический результат заключается в уменьшении обратного давления в выхлопной системе, повышая эффективность двигателя. 3 н. и 10 з.п. ф-лы, 5 ил., 2 табл., 3 пр.

УСТРОЙСТВО И СПОСОБ ОБРАБОТКИ ГАЗА С ИСПОЛЬЗОВАНИЕМ НЕТЕРМИЧЕСКОЙ ПЛАЗМЫ И КАТАЛИТИЧЕСКОЙ СРЕДЫ

Изобретение относится к устройству и способу обработки окислительным разложением опасного газа. Устройство содержит проточный канал, по которому протекает подлежащий обработке газ, плазмогенерирующий блок, включающий в себя первый электрод, второй электрод, диэлектрический материал, которые расположены внутри проточного канала, и блок источника питания для подачи питания переменного тока с выходной частотой 0,5 кГц или выше, при этом между первым электродом и вторым электродом с помощью блока источника питания прикладывается напряжение, чтобы вызвать появление электрического разряда, за счет чего генерируется плазма, и каталитическую среду, которая предусмотрена в том положении, где находится плазма, генерируемая плазмогенерирующим блоком внутри проточного канала, предназначена для ускорения реакции с подлежащим обработке газом и имеет металлические каталитические частицы, находящиеся на неорганическом веществе. Изобретение обеспечивает эффективную обработку опасного газа при нормальной ...

КАТАЛИЗАТОР КАТАЛИТИЧЕСКОГО КРЕКИНГА И ЕГО ПОЛУЧЕНИЕ

Раскрыты катализатор каталитического крекинга и его получение. Катализатор содержит от 20% до 40% по массе, в пересчете на сухое вещество, модифицированного редкоземельными элементами молекулярного сита типа Y, от 2% до 20% по массе, в пересчете на сухое вещество, содержащего добавку оксида алюминия и от 30% до 50% по массе, в пересчете на сухое вещество, глины; причем содержащий добавку оксид алюминия содержит, в пересчете на сухое вещество и в пересчете на массу содержащего добавку оксида алюминия, от 60% до 95% по массе оксида алюминия и от 5% до 40% по массе добавки, которая представляет собой одно или несколько соединений, выбранных из группы, которую составляют соединения, содержащие щелочноземельный металл и/или фосфор. Модифицированное редкоземельными элементами молекулярное сито типа Y имеет содержание оксидов редкоземельных элементов, составляющее от 4% до 12% по массе, содержание фосфора, составляющее от 0% до 10% по массе в пересчете на Р2О5, содержание оксида натрия, составляющее ...

ВЫХЛОПНАЯ СИСТЕМА ДЛЯ ДВИГАТЕЛЯ С ВОСПЛАМЕНЕНИЕМ ОТ СЖАТИЯ, ВКЛЮЧАЮЩАЯ ОБЛАСТЬ ЗАХВАТА ИСПАРИВШЕЙСЯ ПЛАТИНЫ

Изобретение относится к выхлопной системе для обработки выхлопных газов двигателя с воспламенением от сжатия, где выхлопная система содержит катализатор окисления, включающий носитель, который представляет собой проточный монолитный носитель или фильтрующий монолитный носитель и имеет поверхность входного конца и поверхность выходного конца; каталитический материал, расположенный на носителе, причем каталитический материал содержит платину (Pt); и зону захвата, содержащую захватывающий материал, где захватывающий материал содержит Pt-легирующий металл, расположенный на тугоплавком оксиде или нанесенный на тугоплавкий оксид, где Pt-легирующий металл в катализаторе окисления является палладием (Pd), причем захватывающий материал расположен на множестве стенок каналов или нанесен на множество стенок каналов внутри носителя, и при этом тугоплавкий оксид включает по меньшей мере 65% вес. оксида циркония, при этом данная зона захвата имеет среднюю длину ≤20 мм, расположена на поверхности выходного ...

ЧАСТИЦЫ ОКСИДА ЦЕРИЯ И СПОСОБ ИХ ПОЛУЧЕНИЯ

Настоящее изобретение относится к частицам оксида церия, которые имеют превосходную термостойкость, в частности, пригодным для катализаторов, функциональной керамики, твердого электролита для топливных элементов, материала для шлифовки, поглотителей ультрафиолетового излучения, и тому подобное, и особенно пригодным для использования в качестве материала катализатора или сокатализатора, например, при катализе для очистки выхлопных газов транспортных средств. Настоящее изобретение также относится к способу получения таких частиц оксида церия, и к катализатору, например, для очистки выхлопных газов, с использованием таких частиц оксида церия. Способ получения частиц оксида церия включает по меньшей мере стадии подготовки раствора соли церия, содержащей анионы и катионы, где в пределах от 90 до 100% мольн. катионов церия представляют собой четырехвалентные катионы церия. Способ также включает нагревание раствора соли церия при температуре, заключенной в пределах от 60 до 220°C, с получением ...

КОМПОЗИЦИИ АКТИВНЫХ КОМПОНЕНТОВ КРЕМНЕЗЕМНО-ГЛИНОЗЕМНОЙ МАТРИЦЫ ДЛЯ КАТАЛИЗАТОРОВ КРЕКИНГА КУБОВЫХ ОСТАТКОВ

Изобретение относится к вариантам каталитической композиции для крекинга кубовых остатков, к вариантам способа изготовления катализатора крекинга кубовых остатков, а также к вариантам способа крекинга углеводородного сырья. Один из вариантов каталитической композиции для крекинга кубовых остатков содержит: от около 30 до около 60 % мас. глинозема; от более 0 до около 10 % мас. легирующей добавки; от около 2 до около 20 % мас. реакционноспособного кремнезема; от около 3 до около 20 % мас. компонента; от около 10 до около 50 % мас. каолина. Легирующая добавка включает иттербий, гадолиний, церий, лантан, иттрий, барий, магний или смесь любых двух или более из них, измерена в виде оксида. Легирующая добавка импрегнирована в глинозем или нанесена на глинозем покрытием, или осаждена совместно с глиноземом. Компонент содержит пептизируемый бомит, коллоидный кремнезем, оксихлорид алюминия или комбинацию любых двух или более из них. Технический результат изобретения заключается в разработке каталитической ...

СОСТАВ НА ОСНОВЕ ОКСИДА ЦИРКОНИЯ И ОКСИДА ЦЕРИЯ С ПОВЫШЕННОЙ ВОССТАНОВИТЕЛЬНОЙ СПОСОБНОСТЬЮ И СТАБИЛЬНОЙ УДЕЛЬНОЙ ПОВЕРХНОСТЬЮ, СПОСОБ ПОЛУЧЕНИЯ И ИСПОЛЬЗОВАНИЕ ДЛЯ ОБРАБОТКИ ВЫХЛОПНЫХ ГАЗОВ

Изобретение может быть использовано при дожигании выхлопных газов двигателей внутреннего сгорания автомобилей. Получают водную смесь, содержащую соединения циркония и церия и одного из лантанидов, отличных от церия и иттрия. Смесь нагревают до 100°C с получением осадка в виде суспензии в реакционной среде, которую доводят до уровня щелочного рН. Сначала добавляют присадку, выбранную из анионных поверхностно-активных веществ, неионных поверхностно-активных веществ, полиэтиленгликолей, карбоновых кислот и их солей и поверхностно-активных веществ типа карбоксиметилированных этоксилатов жирных спиртов, в полученную среду и после этого отделяют осадок. По другому варианту сначала выделяют осадок из реакционной среды и после этого к осадку добавляют упомянутую присадку. Осадок обжигают в атмосфере инертного газа или в вакууме при 900°C, а затем в окислительной атмосфере при 600°C. Полученный состав содержит оксид церия не более 50 мас.%, степень восстановления после обжига в атмосфере воздуха ...

АДСОРБЕР-КАТАЛИЗАТОР NOx

Изобретение относится к катализатору-ловушке обедненных NOx, содержащему: i) первый слой, причем указанный первый слой содержит смесь или сплав платины и палладия, первый неорганический оксид, который выбран из группы, состоящей из оксида алюминия и диоксида кремния-оксида алюминия, активатор, где данный активатор содержит барий, и материал, абсорбирующий углеводороды, причем материал, абсорбирующий углеводороды, является бета-цеолитом; и ii) второй слой, причем указанный второй слой содержит один или несколько металлов платиновой группы, материал, способный к аккумулированию кислорода (OSC), где указанный OSC выбран из группы, состоящей из оксида церия, и смешанного оксида церия-диоксида циркония, и второй неорганический оксид, причем указанный второй неорганический оксид выбран из группы, состоящей из оксида алюминия и сложного оксида лантана/оксида алюминия; где первый слой по существу не содержит материала, способного к аккумулированию кислорода (OSC), и где второй слой нанесен на первый ...

УЛУЧШЕННАЯ ЛОВУШКА NOХ

Изобретение относится к ловушке NОх для выхлопных систем двигателей внутреннего сгорания и к способу очистки выхлопного газа из двигателя внутреннего сгорания. Катализатор-ловушка NОх содержит подложку, первый слой и второй слой. Первый слой содержит композицию ловушки NОх, содержащую один или несколько благородных металлов, компонент для сохранения NОх, первый носитель и первый церийсодержащий материал, где первый церийсодержащий материал предварительно выдерживают перед внедрением в первый слой. Второй слой содержит родий, второй церийсодержащий материал и второй носитель, где второй церийсодержащий материал не выдерживают перед внедрением во второй слой. Изобретение также включает в себя выхлопные системы, содержащие данный катализатор-ловушку NОх и способ очистки выхлопного газа, использующий данный катализатор-ловушку NОх. Техническим результатом изобретения является повышение качества системы очистки выхлопных газов. 5 н. и 21 з.п. ф-лы, 1 табл.

Способ получения катализатора трансалкилирования диизопропилбензолов с бензолом в изопропилбензол

Цеолит USY с мольным отношением SiO2/Al2O3=11 подвергают трехкратной ионообменной обработке. На первой стадии цеолит суспендируют в 15 масс.%-ном растворе нитрата аммония, рН суспензии доводят до 1,65, нагревают и выдерживают. Отфильтрованный осадок промывают дистиллированной водой, промытый осадок сушат. На второй стадии сухой осадок суспендируют в 15 масс.%-ном растворе нитрата аммония, рН суспензии доводят до 1,78, нагревают, выдерживают. Проводят фильтрацию, промывку и сушку осадка. На третьей стадии сухой осадок суспендируют в 15 масс.%-ном растворе нитрата аммония, доводят рН суспензии до 1,93, нагревают, выдерживают. Проводят фильтрацию, промывку и сушку осадка. Полученный цеолит USY в NH3-форме с мольным отношением SiO2/Al2O3=11 добавляют к смеси, содержащей 15 масс.% бемита Pural SB и 35 масс.% Disperal HP 14. К полученной массе приливают пептизирующий 5 масс.%-ный раствор азотной кислоты, добавляют порциями дистиллированную воду и перемешивают до получения однородной массы, пригодной ...

СПОСОБ КАТАЛИТИЧЕСКОГО ПРЕВРАЩЕНИЯ 2-ГИДРОКСИ-4-МЕТИЛТИОБУТАННИТРИЛА (ГМТБН) В 2-ГИДРОКСИ-4-МЕТИЛТИОБУТАНАМИД (ГМТБА)

Изобретение относится к каталитическому превращению 2-гидрокси-4-метилтиобутаннитрила (ГМТБН) в 2-гидрокси-4-метилтиобутанамид (ГМТБА). Полученный ГМТБА использован далее для получения 2-гидрокси-4-метилтиобутановой кислоты (ГМТБК). Способ превращения ГМТБН с образованием ГМТБА осуществляют в присутствии твердого катализатора, содержащего активную фазу. Указанная активная фаза включает по меньшей мере один оксид металла, выбранный из оксида меди, оксида никеля, оксида железа, оксида циркония, оксида марганца, оксида церия и комбинаций указанных оксидов. Катализатор формуют в присутствии по меньшей мере одного разжижителя. Разжижитель выбирают, в частности, из оксида циркония, оксида титана, оксида алюминия, диоксида кремния, глин, таких как бентониты и аттапульгит. Формованный катализатор подвергают тепловой обработке. Превращение проводят в среде, по существу не содержащей сильной неорганической кислоты. Способ получения ГМТБК включает стадии: 1) превращение ГМТБН в ГМТБА вышеуказанным ...

СПОСОБ ОБРАБОТКИ ПРОМЫШЛЕННЫХ ГАЗОВ

Изобретение относится к способам обработки промышленных газов, содержащих COS, CS2, SO2, H2S, O2 , с получением серы. Сущность способа заключается в том, что исходный газ пропускают через катализатор - оксид церия с объемной скоростью 900 ч-1 при 225-340 С. 1 табл.

ГЕТЕРОГЕННЫЙ КАТАЛИЗАТОР ДЛЯ ВЫСОКОТЕМПЕРАТУРНОГО ДЕГИДРИРОВАНИЯ ПРОПАНА И СПОСОБ ПОЛУЧЕНИЯ ПРОПИЛЕНА С ЕГО ИСПОЛЬЗОВАНИЕМ

Изобретение относится к гетерогенному катализатору для синтеза пропилена методом высокотемпературного дегидрирования пропана, представляющему собою порошок молибдата лантана, полученный методом взаимодействия гексагидрата нитрата лантана La(NO3)3⋅6H2O и дигидрата молибдата калия K2MoO4⋅2H2O, или молибдата празеодима, полученный методом взаимодействия гексагидрата нитрата празеодима Pr(NO3)3⋅6H2O и дигидрата молибдата калия K2MoO4⋅2H2O, с последующим прокаливанием полученного осадка в муфельной печи при температуре 700°C в течение 3 часов, содержащих легирующую примесь ионов калия от 0,05 до 0,10 мас.%. Также изобретение относится к способу дегидрирования пропана. Предлагаемый катализатор является эффективным. 2 н. и 1 з.п. ф-лы, 2 ил., 3 табл., 5 пр.

Способ очистки воздуха от диэтиламина

Изобретение относится к области химической технологии, а именно к способу очистки воздуха от летучих органических соединений (ЛОС), в частности аминов, конкретно к способу очистки воздуха от диэтиламина. Способ очистки воздуха от диэтиламина путем его адсорбции и полного окисления включает контактирование воздуха с катализатором при нагревании. В качестве катализатора используют систему на основе кобальтита лантана формулы LaCoO3 со структурой перовскита, нанесенного на носитель - оксид циркония, легированный лантаном, характеризующуюся пористой структурой с удельной площадью поверхности 72 м2/г, объемом мезопор 0,183 см3/г. Соотношение компонентов, мас.%: LaCoO3 - 20, носитель – остальное. Далее проводят контактирование воздуха, содержащего примеси диэтиламина, с катализатором при микроволновом нагреве слоя катализатора с мощностью и частотой излучения 50 Вт и 3,8 ГГц соответственно, при температуре 100-200°С и объемной скорости подачи сырья 6000 ч-1. Изобретение обеспечивает полную очистку ...

ОЧИЩАЮЩИЙ ОТ ДИСПЕРСНЫХ ЧАСТИЦ МАТЕРИАЛ, ФИЛЬТР-КАТАЛИЗАТОР ДЛЯ ОЧИСТКИ ОТ ДИСПЕРСНЫХ ЧАСТИЦ С ИСПОЛЬЗОВАНИЕМ ОЧИЩАЮЩЕГО ОТ ДИСПЕРСНЫХ ЧАСТИЦ МАТЕРИАЛА И СПОСОБ РЕГЕНЕРИРОВАНИЯ ФИЛЬТРА-КАТАЛИЗАТОРА ДЛЯ ОЧИСТКИ ОТ ДИСПЕРСНЫХ ЧАСТИЦ

Изобретение относится к очищающему от дисперсных частиц материалу и его использованию. Описан очищающий от дисперсных частиц материал, используемый для фильтра-катализатора для очистки от дисперсных частиц, причем фильтр-катализатор расположен на пути потока выхлопных газов двигателя внутреннего сгорания, улавливает дисперсные частицы в выхлопных газах, образующихся в двигателе внутреннего сгорания, и сжигает осаждаемые дисперсные частицы с тем, чтобы регенерироваться, причем очищающий от дисперсных частиц материал включает в себя: оксид, содержащий: церий (Се), обладающий способностью аккумулирования-высвобождения кислорода; и по меньшей мере один металл (Me), выбранный из группы, состоящей из циркония (Zr), иттрия (Y), лантана (La), празеодима (Рr), стронция (Sr), ниобия (Nb) и неодима (Nd), при этом отношение содержаний (Се:Ме) церия к металлу составляет от 6:4 до 9:1 в единицах атомного отношения, и степень кристалличности (CR), представленная следующей формулой (1), составляет в пределах ...

ЭКСТРУДИРОВАННЫЙ SCR-ФИЛЬТР

Изобретение относится к области очистки газов. Предложен фильтр с протеканием через стенки, содержащий катализатор для преобразования оксидов азота в присутствии восстанавливающего агента. Фильтр содержит экструдированную твердую массу, содержащую: 10-95% масс., по меньшей мере, одного компонента связующего вещества/матрицы; 5-90% масс. цеолитного молекулярного сита, нецеолитного молекулярного сита или смеси любых двух или более из них и 0-80% масс. необязательно стабилизированного оксида церия. Катализатор содержит, по меньшей мере, один металл, где: (i) по меньшей мере, один металл присутствует в экструдированной твердой массе, а также присутствует при более высокой концентрации на поверхности экструдированной твердой массы; (ii) по меньшей мере, один металл присутствует в экструдированной твердой массе, а также, его наносят в виде одного или нескольких слоев покрытия на поверхность экструдированной твердой массы, или (iii) по меньшей мере, один металл присутствует в экструдированной ...

СПОСОБ ИЗГОТОВЛЕНИЯ КАТАЛИЗАТОРА РАЗЛОЖЕНИЯ АММИАКА

Изобретение относится к способу изготовления катализатора разложения аммиака, включающему нанесение на поверхность носителя путем плазменного напыления сначала порошковой композиции для формирования адгезионного слоя и затем порошковой композиции для формирования каталитически активного слоя с последующим формированием слоя активатора, согласно изобретению дополнительно после формирования слоя активатора восстанавливают катализатор в потоке водорода при температурах 300-500°С, при этом в качестве порошковой композиции для формирования адгезионного слоя используют алюмоникелевый порошок, в качестве порошковой композиции для формирования каталитически активного слоя используют ZrO2 или Ce0.5Zr0.5O2 или их смеси, а формирование слоя активатора осуществляют путем пропитки подготовленного носителя предшественником активного компонента - раствором комплекса рутения [Ru[(NH3)nClm]OHp, где n=5-6, m=0-1, р=1-2. Техническим результатом изобретения является создание эффективного и термостабильного ...

Катализатор и способ его получения

Изобретение относится к катализатору и способу получения катализатора для производства бензинов или концентратов ароматических соединений. Катализатор особенно эффективен для процессов совместной переработки углеводородных фракций, оксигенатов и олефин-содержащих фракций. Достигается увеличение межрегенерационного периода работы катализатора до более 450 часов; увеличение выхода фракции С5+углеводородного продукта; снижение селективности образования метана и олефинов С2-С4. Катализатор включает цеолит ZSM-5 в количестве от 50.0 до 85.0 мас.%, связующее, оксиды цинка и редкоземельных элементов; объем пор катализатора от 0.15 до 0.26 см3/г, средний диаметр пор катализатора от 38 до 53 соотношение слабых и сильных кислотных центров катализатора от 2.2 до 3.5. Способ получения катализатора включает: смешение HZSM-5, пептизированного псевдобемита и затем кремнезоля с рН 8-10 для получения формовочной массы, формование, сушка и прокаливание формовочной массы с получением катализаторной композиции ...

МАТЕРИАЛ ДЛЯ НОСИТЕЛЯ КАТАЛИЗАТОРА С ВЫСОКОЙ КИСЛОРОДНОЙ ЕМКОСТЬЮ И СПОСОБ ЕГО ПРИГОТОВЛЕНИЯ

... 1. Смешанный оксид из оксида церия и оксида циркония, обладающий многофазной кубической формой кристаллизации и кислородной емкостью более 300 Ммоль O2/г образца после старения в течение 4 час при 1000° С. 2. Смешанный оксид по п.1, в котором кислородная емкость после старения в течение 4 час при 1000° С больше 315 Ммоль O2/г образца. 3. Смешанный оксид по п.2, в котором кислородная емкость после старения в течение 4 час при 1000° С больше 330 Ммоль O2/г образца. 4. Смешанный оксид по п.1, который имеет скорость отдачи кислорода больше 1,0 мг-О2/м2-мин. 5. Смешанный оксид по п.4, который имеет скорость отдачи кислорода больше 2,0 мг-О2/м2-мин. 6. Смешанный оксид по п.5, который имеет скорость отдачи кислорода больше 5,0 мг-О2/м2-мин. 7. Смешанный оксид по п.1, который на основании определения с помощью метода рассеяния рентгеновских лучей под малыми углами (SAXS) имеет нормализованную интенсивность рассеяния I(Q) в пределах от примерно 47 до примерно 119 при векторе рассеяния Q, равном ...

МАТЕРИАЛ ДЛЯ ПОКРЫТИЯ С КАТАЛИТИЧЕСКОЙ АКТИВНОСТЬЮ И ПРИМЕНЕНИЕ МАТЕРИАЛА ПОКРЫТИЯ

... 1. Материал для покрытия с каталитической активностью для уменьшения температуры горения сажи и органических веществ, отличающийся тем, что материал для покрытия содержит: ! по меньшей мере, 20 и менее 50 вес.% соединений подгруппы металлов или элементов 3-й и 4-й главной группы, ! от 10 до 80 вес.% соединений щелочных или щелочноземельных элементов, ! причем молярная доля соединений щелочных или щелочноземельных элементов выше молярной доли соединений подгруппы металлов или элементов 3-й или 4-й главной группы. ! 2. Материал для покрытия по п.1, отличающийся тем, что соединения щелочных или щелочноземельных элементов выбирают из группы, состоящей из соединений натрия, калия, цезия и рубидия. ! 3. Материал для покрытия по п.1, отличающийся тем, что соединения подгруппы металлов или элементов 3-й или 4-й главной группы выбирают из группы, состоящей из соединений циркония, алюминия, церия, кремния, титана, железа, германия и галлия. ! 4. Материал для покрытия по п.1, отличающийся тем, что ...

ПОКРЫТИЕ ДЛЯ ВОССТАНОВЛЕНИЯ ОКСИДОВ АЗОТА

... 1. Каталитическое покрытие для применения в качестве гидролитического катализатора (Г-катализатора) для восстановления оксидов азота, отличающееся тем, что в качестве соединения, адсорбирующего HNCO и оксиды азота, Г-катализатор содержит лантан и дополнительно содержит одно или несколько соединений, являющееся или являющихся щелочным и/или щелочно-земельным металлом, и/или иттрием, и/или гафнием, и/или празеодимом, и/или галлием, и/или цирконием.2. Каталитическое покрытие по п. 1, отличающееся тем, что Г-катализатор содержит каталитическое покрытие на основе диоксида титана, предпочтительно в форме анатаза, на основе SiO, на основе цеолита, предпочтительно ZSM-5 и/или в бета форме, и/или на основе двуокиси циркония.3. Каталитическое покрытие по п. 1 или 2, отличающееся тем, что Г-катализатор содержит восстановитель, являющийся мочевиной и/или восстановитель, включающий NHгруппу (i=1-4).4. Каталитическое покрытие по п. 1, отличающееся тем, что Г-катализатор содержит соединение, адсорбирующее ...

КАТАЛИЗАТОР ДЛЯ УДАЛЕНИЯ ОКСИДОВ АЗОТА ИЗ ОТРАБОТАВШИХ ГАЗОВ ДИЗЕЛЬНЫХ ДВИГАТЕЛЕЙ

... 1. Катализатор для удаления оксидов азота из отработавших газов (ОГ) дизельных двигателей, состоящий из носителя длиной L и каталитически активного покрытия из одной или нескольких материальных зон, содержащих- цеолит или цеолитоподобное соединение, содержащий/содержащее медь в количестве от 1 до 10 мас.% в пересчете на всю его массу и выбранный/выбранное из группы, включающей шабазит, SAPO-34, ALPO-34 и β-цеолит, и- по меньшей мере одно соединение, выбранное из группы, включающей оксид бария, гидроксид бария, карбонат бария, оксид стронция, гидроксид стронция, карбонат стронция, оксид празеодима, оксид лантана, оксид магния, смешанный оксид магния и алюминия, оксид щелочного металла, гидроксид щелочного металла, карбонат щелочного металла и их смеси.2. Катализатор по п. 1, отличающийся тем, что цеолит, соответственно цеолитоподобное соединение, имеет средний размер пор менее 4 ангстрем и выбран/выбрано из группы, включающей шабазит, SAPO-34 и ALPO-34.3. Катализатор по п. 1 или 2, отличающийся ...

Катализатор, способ его получения, применение и способ извлечения серы

Настоящее изобретение относится к катализатору, способу его получения и применения, а также к способу извлечения серы с использованием этого катализатора. Катализатор содержит диоксид титана в качестве носителя, оксид лютеция и/или оксид церия и оксид кальция, при этом, исходя из 100 масс. % катализатора, содержание диоксида титана составляет 80-96 масс. %, содержание оксида кальция составляет 2-10 масс. % и содержание оксида лютеция и/или оксида церия составляет 2-10 масс. %. Катализатор по настоящему изобретению содержит оксид лютеция и/или оксид церия в качестве активных ингредиентов, диоксид титана в качестве носителя и оксид кальция в качестве регулятора щелочности, при определенном соотношении для совместного действия; когда катализатор используют в процессе извлечения серы, он имеет улучшенную стабильность активности, улучшенную активность в гидролизе сероорганических соединений и активность в реакции Клауса, при этом активность в гидролизе сероорганических соединений составляет ...

КОМБИНИРОВАННЫЙ КАТАЛИЗАТОР И СПОСОБ ПОЛУЧЕНИЯ ОБОГАЩЁННОГО ТРИПТАНОМ ЭКОЛОГИЧЕСКИ ЧИСТОГО ВЫСОКООКТАНОВОГО БЕНЗИНА В ЕГО ПРИСУТСТВИИ

Настоящее изобретение относится к получению высокооктанового бензина с низким содержанием ароматических соединений, но с высоким содержанием триптана (2,2,3-триметилбутана), и может применяться в области получения моторного топлива. Комбинированный катализатор получения обогащенного триптаном экологически чистого бензина включает модифицированные цеолиты HZSM-5 и HY при их массовом отношении 1:1-1:2, причем модифицированный цеолит HZSM-5 имеет следующий состав, мас.%: цеолит HZSM-5 с SiO/AlO=37, содержащий не более 0,04 мас.% оксида натрия - 50-70, Mg - 0,1-2,0, оксид алюминия - остальное, а модифицированный цеолит HY имеет следующий состав, мас.%: цеолит HY с SiO/AlO=2.73, содержащий не более 0,02 мас.% оксида натрия - 50-70, Pd - 0,1-1,0, оксид лантана - 0,5-3,5, оксид алюминия - остальное. Способ получения обогащенного триптаном экологически чистого бензина с октановым числом не менее 90 пунктов по исследовательскому методу включает превращение ДМЭ и/или метанола в присутствии указанного ...

Катализатор, способ его получения, применение и способ извлечения серы

Настоящее изобретение относится к катализатору, способу его получения и применения, а также к способу извлечения серы с использованием этого катализатора. Катализатор содержит диоксид титана в качестве носителя, оксид лютеция и/или оксид церия и оксид кальция, при этом, исходя из 100 масс. % катализатора, содержание диоксида титана составляет 80-96 масс. %, содержание оксида кальция составляет 2-10 масс. % и содержание оксида лютеция и/или оксида церия составляет 2-10 масс. %. Катализатор по настоящему изобретению содержит оксид лютеция и/или оксид церия в качестве активных ингредиентов, диоксид титана в качестве носителя и оксид кальция в качестве регулятора щелочности, при определенном соотношении для совместного действия; когда катализатор используют в процессе извлечения серы, он имеет улучшенную стабильность активности, улучшенную активность в гидролизе сероорганических соединений и активность в реакции Клауса, при этом активность в гидролизе сероорганических соединений составляет ...

КАТАЛИЗАТОРЫ, СОДЕРЖАЩИЕ БЛАГОРОДНЫЙ МЕТАЛЛ И ЛАНТАНИД, НАНЕСЕННЫЕ НА ПО СУЩЕСТВУ НЕПОРИСТУЮ ПОДЛОЖКУ

Изобретение относится к катализатору для использования в процессах гидрирования. Предлагаемый катализатор содержит благородный металл, который представляет собой палладий, и элемент группы лантанидов, который представляет собой европий, нанесенные на носитель, содержащий по существу непористую стеклосодержащую подложку. Данная стеклосодержащая подложка имеет удельную поверхность, измеренную методом S.A., основанном на тепловой адсорбции/десорбции N, или методом S.A., основанном на тепловой адсорбции/десорбции Kr, в диапазоне от 0,01 м/г до 10 м/г, и скорость изменения удельной поверхности по хемосорбции натрия SACR≤0,5. При этом палладий и европий каждый присутствуют в количестве от 10 частей на миллион по весу до 1% по весу, исходя из веса катализатора. Предлагаемый катализатор обладает селективностью и стабильностью в активности в процессах гидрирования. Изобретение также относится к способу гидрирования сырьевого потока в присутствии данного катализатора и способу получения такого катализатора ...

ФОРМОВАННЫЕ ГЕТЕРОГЕННЫЕ КАТАЛИЗАТОРЫ

... 1. Каталитический элемент в форме цилиндра, имеющего длину С и диаметр D, который имеет 3-10 отверстий, проходящих насквозь, причем указанный цилиндр имеет куполообразные концы отрезков А и В, так что (A+B+C)/D находится в интервале 0,50-2,00, и (А+В)/С находится в интервале 0,40-5,00. ! 2. Каталитический элемент по п.1, в котором А и В являются одинаковыми. ! 3. Каталитический элемент по п.1 или 2, в котором (A+B+C)/D находится в интервале 0,75-1,50. ! 4. Каталитический элемент по п.1, в котором (A+B)/C находится в интервале 0,4-3,00. ! 5. Каталитический элемент по п.1, имеющий 3-6 отверстий, проходящих насквозь. ! 6. Каталитический элемент по п.1, в котором отверстие или отверстия имеют круглое поперечное сечение и независимо имеют диаметр d' в интервале 0,05D-0,5D. ! 7. Каталитический элемент по п.1, в котором наружная поверхность элемента имеет одну или более канавок, проходящих вдоль его длины. ! 8. Каталитический элемент по п.7, в котором поверхность имеет 2-12 канавок. ! 9. Каталитический ...

КАТАЛИТИЧЕСКИЕ ИЗДЕЛИЯ, СОДЕРЖАЩИЕ МЕТАЛЛЫ ПЛАТИНОВОЙ ГРУППЫ И МЕТАЛЛЫ НЕ ПЛАТИНОВОЙ ГРУППЫ, И СПОСОБЫ ИХ ПОЛУЧЕНИЯ И ИХ ПРИМЕНЕНИЕ

ЭЛЕМЕНТ ДЛЯ ПОДАВЛЕНИЯ ОБРАЗОВАНИЯ СЕРОВОДОРОДА И КАТАЛИЗАТОР ДЛЯ ОЧИСТКИ ВЫХЛОПНЫХ ГАЗОВ

... 1. Элемент, подавляющий образование сероводорода, содержащий: ! часть, адсорбирующую серу, содержащую оксид, включающий в себя, по меньшей мере, оксид церия, и расположенную на верхней стороне относительно течения потока выхлопного газа; и ! часть, высвобождающую серу, обладающую поверхностной кислотностью большей, чем поверхностная кислотность части, адсорбирующей серу, и расположенную на нижней стороне относительно течения потока выхлопного газа. ! 2. Элемент, подавляющий образование сероводорода по п.1, в котором часть, высвобождающая серу, содержит оксид титана. ! 3. Элемент, подавляющий образование сероводорода по п.1, в котором часть, адсорбирующая серу, покрыта, по меньшей мере, одним металлом, выбранным из группы, состоящей из щелочноземельных металлов и редкоземельных элементов. ! 4. Элемент, подавляющий образование сероводорода по п.3, в котором, по меньшей мере, один упомянутый металл, выбранный из группы, состоящей из щелочноземельных металлов и редкоземельных элементов, нанесен ...

Ce-Zr-R-O КАТАЛИЗАТОРЫ, ПРЕДМЕТЫ, ВКЛЮЧАЮЩИЕ Ce-Zr-R-O КАТАЛИЗАТОРЫ, И СПОСОБЫ ПОЛУЧЕНИЯ И ПРИМЕНЕНИЯ Ce-Zr-R-O КАТАЛИЗАТОРОВ

... 1. Катализатор восстановления NOx, включающий: ! соединение Cea-Zrb-Rc-Ad-Me-Ox, в котором R представляет собой W или Mn; если R представляет собой W, А выбирают из группы, включающей Мо, Та, Nb и комбинации, включающие по крайней мере один из перечисленных вариантов А; если R представляет собой Mn, А выбирают из группы, включающей W, Мо, Та, Nb и комбинации, включающие по крайней мере один из перечисленных вариантов А; М представляет собой трехвалентный ион редкоземельного элемента; a+b+c+d+e=1; а составляет от примерно 0,1 до примерно 0,6; b составляет от примерно 0,25 до примерно 0,7; с составляет от примерно 0,02 до примерно 0,5; если R представляет собой Mn, d составляет от примерно 0,04 до примерно 0,2, а если R представляет собой W, d меньше или равно примерно 0,2; е меньше или равно примерно 0,15; катализатор способен восстанавливать NOx. ! 2. Катализатор по п.1, в котором трехвалентный ион редкоземельного элемента выбирают из группы, включающей Sm, Gd, Dy, Er, Yb, Но, Tm, Lu и ...

КОМПОЗИЦИЯ С ПОВЫШЕННОЙ КИСЛОТНОСТЬЮ НА ОСНОВЕ ОКСИДОВ ЦИРКОНИЯ, КРЕМНИЯ И, ПО МЕНЬШЕЙ МЕРЕ, ОДНОГО ДРУГОГО ЭЛЕМЕНТА, ВЫБРАННОГО ИЗ ТИТАНА, АЛЮМИНИЯ, ВОЛЬФРАМА, МОЛИБДЕНА, ЦЕРИЯ, ЖЕЛЕЗА, ОЛОВА, ЦИНКА И МАРГАНЦА

... 1. Композиция на основе оксида циркония, оксида кремния и, по меньшей мере, одного оксида другого элемента М, выбранного из титана, алюминия, вольфрама, молибдена, церия, железа, олова, цинка и марганца в следующих массовых пропорциях различных элементов: ! оксид кремния: 5-30%, ! оксид элемента М:1-20%, ! достаточное количество до 100% оксида циркония, ! отличающаяся тем, что она обладает, кроме того, кислотностью, определенную в результате испытания с использованием метилбутанола, равную, по меньшей мере, 90%. ! 2. Композиция по п.1, отличающаяся тем, что элемент М представляет собой вольфрам, и после кальцинации при 900°С в течение 4 ч она обладает удельной поверхностью, равной, по меньшей мере, 65 м2/г. ! 3. Композиция по п.1, отличающаяся тем, что элемент М отличен от вольфрама, и после кальцинации при 900°С в течение 4 ч она имеет удельную поверхность, равную, по меньшей мере, 95 м2/г. ! 4. Композиция по любому из предыдущих пунктов, отличающаяся тем, что она обладает кислотностью ...

КОМПОЗИЦИИ, ПРИМЕНЯЮЩИЕСЯ, В ЧАСТНОСТИ, ДЛЯ УЛАВЛИВАНИЯ ОКСИДОВ АЗОТА (NOX)

... 1. Твердая композиция на основе оксида алюминия, церия и металлического элемента M, выбранного из группы, включающей барий, стронций или сочетание этих двух элементов, отличающаяся тем, что она содержит по меньшей мере 10 вес.% элемента M, выраженного в весе оксида элемента M, отнесенном к полному весу композиции, и соединение формулы MAl2O4 не обнаруживается дифракцией рентгеновских лучей на композиции, подвергавшейся обжигу на воздухе при 700°C в течение 2 ч. ! 2. Композиция по п.1, отличающаяся тем, что концентрация элемента M составляет от 10 до 25 вес.% в расчете на вес оксида указанного элемента M, отнесенного к полному весу композиции. ! 3. Композиция по п.2, отличающаяся тем, что концентрация вышеуказанного элемента M составляет от 15 до 22 вес.%. ! 4. Композиция по одному из пп.1-3, отличающаяся тем, что после обжига при 900°C в течение 2 ч она имеет удельную поверхность по меньшей мере 80 м2/г. ! 5. Композиция по одному из пп.1-3, отличающаяся тем, что после обжига при 900°C в ...

ОКИСЛИТЕЛЬНЫЙ КАТАЛИЗАТОР И СИСТЕМА ВЫПУСКА ВЫХЛОПНЫХ ГАЗОВ ДЛЯ ДИЗЕЛЬНОГО ДВИГАТЕЛЯ

МОДУЛИ И СПОСОБЫ ПОДГОТОВКИ ТОПЛИВА

... 1. Модуль подготовки топлива для обработки сгораемого топлива перед сжиганием, включающий:корпус, имеющий впускной и выпускной концы и определяющий сквозной канал для топлива между ними; ивставной блок подготовки топлива, расположенный в сквозном канале, таким образом, что топливо, протекающее в канале между впускным и выпускным концами корпуса, вступает в контакт с блоком подготовки топлива, причемвставной блок подготовки топлива включает:(i) массу каталитических металлических элементов, которые составляет каталитический металл;(ii) массу твердого полимерного каталитического материала в форме пластинок, диспергированных в массе каталитических металлических материалов, причем пластинки из твердого полимерного каталитического материала составляют полимерный связующий материал и каталитическую смесь твердых частиц цеолита и твердых частиц редкоземельного металла или оксида металла, смешанных в твердом полимерном связующем материале.2. Модуль подготовки топлива по п.1, дополнительно включающий ...

КАТАЛИЗАТОР КАТАЛИТИЧЕСКОГО КРЕКИНГА И ЕГО ПОЛУЧЕНИЕ

ДЕТАЛЬ, СОДЕРЖАЩАЯ ПОДЛОЖКУ СО СЛОЕМ КЕРАМИЧЕСКОГО ПОКРЫТИЯ

... 1. Деталь, содержащая подложку, выполненную из электропроводящего материала, и имеющая покрытие на по меньшей мере части поверхности подложки, причем покрытие содержит керамический слой, причем деталь отличается тем, что указанный слой покрытия имеет в основе оксиды церия, и тем, что указанный слой покрытия имеет концентрацию кислородных вакансий, больше или равную 1×10см, содержит множество трещин, выходящих на его поверхность, и имеет толщину по меньшей мере 5 мкм и не более 100 мкм.2. Деталь по п.1, отличающаяся тем, что расстояние между двумя соседними трещинами составляет от 5 до 50 мкм.3. Деталь по п.1, отличающаяся тем, что указанный слой покрытия содержит:- от 0,5 до 35 ат.% оксидов церия,- от 0,5 до 75 ат.% кислорода, и- от 0,5 до 30 ат.% азота.4. Деталь по п.1, отличающаяся тем, что указанный слой покрытия содержит также по меньшей мере один оксигидроксид металла формулы MO.OH, где M означает металл, относящийся к группе, образованной лантанидами, иттрием, цирконием и/или гафнием ...

КАТАЛИТИЧЕСКАЯ СИСТЕМА СЕЛЕКТИВНОГО КАТАЛИТИЧЕСКОГО ВОССТАНОВЛЕНИЯ

КАТАЛИТИЧЕСКИЕ СИСТЕМЫ ДЛЯ СЕЛЕКТИВНОГО КАТАЛИТИЧЕСКОГО ВОССТАНОВЛЕНИЯ

НАНОЧАСТИЦЫ ВОЛОКОН ОКСИДА КРЕМНИЯ С РАЗВИТОЙ ПОВЕРХНОСТЬЮ

... 1. Наночастица из множества волокон, в которой каждое волокно контактирует с одним другим волокном и каждое волокно имеет длину примерно 1-5000 нм и толщину примерно 1-50 нм.2. Наночастица по п.1, которая состоит из оксида кремния.3. Наночастица по п.1, в которой каждое волокно имеет длину примерно 1-250 нм.4. Наночастица по п.1, в которой каждое волокно имеет толщину примерно 1-25 нм.5. Наночастица по п.1, в которой каждое волокно имеет толщину примерно 1-10 нм.6. Наночастица по п.1, в которой каждое волокно имеет длину примерно 1-250 нм и толщину примерно 1-10 нм.7. Наночастица по п.1, в которой волокна имеют разную толщину и разную длину.8. Наночастица по п.1, в которой волокна имеют равномерную толщину и равномерную длину.9. Наночастица по п.1, которая состоит примерно из 10-10волокон.10. Наночастица по п.9, которая состоит по меньшей мере примерно из 10волокон.11. Наночастица по п.10, которая состоит по меньшей мере примерно из 10волокон.12. Наночастица по п.1, которую определяют как ...

СПОСОБ ИЗГОТОВЛЕНИЯ КАТАЛИЗАТОРА

... 1. Способ получения катализатора на основе частиц с размером поперечного сечения 1-50 нм и отношением размеров 0,5-5 с использованием слоя добавки, причем способ включает в себя:(i) формование слоя порошкового катализатора или материала-носителя катализатора,(ii) связывание или расплавление порошка в упомянутом слое согласно заданному шаблону,(iii) повторение пунктов (i) и (ii) слой за слоем с образованием формованного блока, и(iv) необязательно, нанесение каталитического материала на упомянутый формованный блок.2. Способ по п.1, в котором порошковый материал представляет собой порошковый катализатор.3. Способ по п.2, в котором порошковый катализатор содержит один или более металлов или соединений металлов, содержащих металлы, выбранные из группы, состоящей из Na, K, Mg, Ca, Ba, Al, Si, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Sn, Sb, La, Hf, W, Re, Ir, Pt, Au, Pb и Ce.4. Способ по п.1, в котором порошковый материал представляет собой порошок носителя катализатора ...

КАТАЛИЗАТОР НА ОСНОВЕ СМЕШАННЫХ ОКСИДОВ И СПОСОБ ПОЛУЧЕНИЯ КАРБОНОВЫХ КИСЛОТ ИЛИ СЛОЖНЫХ ЭФИРОВ С ЭТИЛЕНОВОЙ НЕНАСЫЩЕННОСТЬЮ

... 1. Катализатор для взаимодействия формальдегида или его подходящего источника с карбоновой кислотой или сложным эфиром для получения карбоновой кислоты или сложного эфира с этиленовой ненасыщенностью, предпочтительно карбоновых кислот или сложного эфира с этиленовой ненасыщенностью в α, β-положении, где катализатор включает оксид металла, имеющий, по меньшей мере, два типа катионов металла, Ми М, где Мпредставляет собой, по меньшей мере, один металл, выбранный из группы 3 или 4 в 4-6 периодах Периодической таблицы, группы 13 в 3-5 периодах Периодической таблицы, или остающихся элементов в лантаноидной группе (а именно, скандия, иттрия, лантаноидных элементов, титана, циркония, гафния, алюминия, галлия, индия), и Мпредставляет собой, по меньшей мере, один металл, выбранный из группы 5 в 5 или 6 периодах Периодической таблицы или группы 15 в 4 или 5 периодах Периодической таблицы (а именно, ниобия, тантала, мышьяка и сурьмы),в котором отношение М:Mнаходится в диапазоне от 10:1 до 1:10,и в ...

КАТАЛИЗАТОР ТРОЙНОГО ДЕЙСТВИЯ

СПОСОБ ПОЛУЧЕНИЯ NOx АККУМУЛИРУЮЩИХ МАТЕРИАЛОВ

ФИЛЬТР ДЛЯ ФИЛЬТРОВАНИЯ ВЕЩЕСТВА В ВИДЕ ЧАСТИЦ ИЗ ВЫХЛОПНЫХ ГАЗОВ, ВЫПУСКАЕМЫХ ИЗ ДВИГАТЕЛЯ С ПРИНУДИТЕЛЬНЫМ ЗАЖИГАНИЕМ

... 1. Фильтр для фильтрования вещества в виде частиц (ВВЧ) из выхлопных газов, выпускаемых из двигателя с принудительным зажиганием, который содержит пористую подложку, имеющую впускные поверхности и выпускные поверхности, при этом впускные поверхности отделены от выпускных поверхностей пористой структурой, содержащей поры первого среднего размера, причем пористая структура покрыта покрытием, содержащим множество твердых частиц, причем пористая структура пористой подложки с покрытием содержит поры второго среднего размера, и поры второго среднего размера меньше пор первого среднего размера.2. Фильтр по п.1, в котором первый средний размер пор пористой структуры пористой подложки составляет от 8 до 45 мкм.3. Фильтр по п.1, в котором количество покрытия составляет >0,50 г/дюйм.4. Фильтр по п.3, в котором количество покрытия составляет >1,00 г/дюйм.5. Фильтр по пп.1, 2, 3 или 4, содержащий поверхностное покрытие, при этом слой покрытия, по существу, покрывает поверхностные поры пористой структуры ...

КОЛЛОИДНАЯ ВОДНАЯ ДИСПЕРСИЯ СОЕДИНЕНИЯ ЦЕРИЯ И ПО МЕНЬШЕЙ МЕРЕ ЕЩЕ ОДНОГО ЭЛЕМЕНТА, ВЫБРАННОГО ИЗ СЕМЕЙСТВ РЕДКОЗЕМЕЛЬНЫХ МЕТАЛЛОВ, ПЕРЕХОДНЫХ МЕТАЛЛОВ, АЛЮМИНИЯ, ГАЛЛИЯ И ЦИРКОНИЯ, СПОСОБ ПОЛУЧЕНИЯ И ПРИМЕНЕНИЕ

... 1. Коллоидная водная дисперсия соединения церия и по меньшей мере еще одного элемента М, выбранного из отличных от церия редкоземельных элементов, титана, ванадия, хрома, марганца, железа, кобальта, никеля, меди, цинка, алюминия, галлия и циркония, отличающаяся тем, что она обладает удельной электропроводностью не выше 5 мС/см. 2. Дисперсия по п.1, отличающаяся тем, что она имеет концентрацию оксида церия и по меньшей мере одного другого из названных выше элементов по меньшей мере 50 г/л и, более предпочтительно, по меньшей мере 80 г/л. 3. Дисперсия по п.1 или 2, отличающаяся тем, что она содержит церий (III). 4. Дисперсия по п.3, отличающаяся тем, что содержание в ней церия (III) по отношению к общему церию не превышает 50% и, более предпочтительно, не превышает 35%. 5. Дисперсия по одному из предыдущих пунктов, отличающаяся тем, что количество содержащегося в ней элемента М не превышает 50%, выраженных отношением молей элемента М к сумме молей элемента М и церия. 6. Дисперсия по одному ...

МАТЕРИАЛ СЛОЖНОГО ОКСИДА И КАТАЛИЗАТОР ОЧИСТКИ ВЫХЛОПНЫХ ГАЗОВ С ЕГО ИСПОЛЬЗОВАНИЕМ

ТРОЙНОЙ КАТАЛИЗАТОР, СОДЕРЖАЩИЙ ЭКСТРУДИРОВАННУЮ ТВЕРДУЮ МАССУ

... 1. Тройной катализатор, содержащий экструдированную твердую массу, содержащую:10-95 мас.%, по меньшей мере, одного компонента связующего вещества/матрицы;5-90 мас.% цеолитного молекулярного сита, нецеолитного молекулярного сита или смеси любых двух или более из них и0-80 мас.% необязательно стабилизированного оксида церия,этот катализатор содержит, по меньшей мере, один благородный металл и, необязательно, по меньшей мере, один неблагородный металл, где:(i) по меньшей мере, один благородный металл находится в одном или нескольких слоях покрытия на поверхности экструдированной твердой массы;(ii) по меньшей мере, один металл присутствует в экструдированной твердой массе и, по меньшей мере, один благородный металл также находится в одном или нескольких слоях покрытия на поверхности экструдированной твердой массы или(iii) по меньшей мере, один металл присутствует в экструдированной твердой массе, присутствует при более высокой концентрации на поверхности экструдированной твердой массы и, по ...

АДСОРБЕР-КАТАЛИЗАТОР NOx

КАТАЛИТИЧЕСКИЙ ФИЛЬТР С ПРОТОЧНЫМИ СТЕНКАМИ, СНАБЖЕННЫЙ МЕМБРАНОЙ

КАТАЛИТИЧЕСКИЙ ФИЛЬТР ДЛЯ ДИЗЕЛЬНОЙ САЖИ И СПОСОБ ЕГО ИСПОЛЬЗОВАНИЯ

... 1. Усовершенствованный каталитический фильтр для дизельной сажи, содержащий пористый элемент фильтра с покрытием из каталитического агента, так что дизельная сажа из выхлопного газа дизельного двигателя осаждается в контакте с каталитическим агентом, когда выхлопной газ из дизельного двигателя проходит через пористый элемент фильтра, и так что температура воспламенения или температура окисления осажденной дизельной сажи понижается, где усовершенствование включает в себя: каталитический агент, содержащий щелочной металл, церий и кислород, молярное отношение щелочного металла к церию для каталитического агента составляет от 0,5 до 5. 2. Усовершенствованный каталитический фильтр для дизельной сажи по п.1, в котором количество церия для каталитического агента больше, примерно, чем восемь массовых процентов от каталитического агента, количество кислорода для каталитического агента составляет больше, примерно, чем пять массовых процентов от каталитического агента. 3. Усовершенствованный каталитический ...

Способ приготовления катализатора для очистки выхлопных газов

VERFAHREN ZUR GASPHASENPOLYMERISATION

SINTERBESTÄNDIGES KATALYSATORMATERIAL UND VERFAHREN ZU DESSEN HERSTELLUNG

Stickoxid-Speichermaterial und daraus hergestellter Stickoxid-Speicherkatalysator

Die Erfindung betrifft ein Stickoxid-Speichermaterial, welches wenigstens eine Speicherkomponente für Stickoxide in Form eines Oxides, Mischoxides, Carbonates oder Hydroxides der Erdalkalimetalle Magnesium, Calcium, Strontium und Barium sowie der Alkalimetalle Kalium und Cäsium auf einem hochoberflächigen Trägermaterial enthält. Das Speichermaterial ist dadurch gekennzeichnet, daß DOLLAR A das Trägermaterial ausgewählt ist aus der Gruppe dotiertes Ceroxid, Cer/Zirkon-Mischoxid, Calciumtitanat, Strontiumtitanat, Bariumtitanat, Bariumstannat, Bariumzirkonat, Magnesiumoxid, Lanthanoxid, Praseodymoxid, Samariumoxid, Neodymoxid, Yttriumoxid, Zirkonsilikat, Yttriumbariumcuprat, Bleititanat, Zinntitanat, Wismuttitanat, Lanthancobaltat, Lanthanmanganat und Bariumcuprat oder Mischungen davon.

VERFAHREN ZUR GEWINNUNG EINES SELTENERDOXIDS UND GEWONNENES PRODUKT.

Zusammensetzung auf der Grundlage von Zirconiumoxid und von Oxiden von Cer, Lanthan und einer anderen seltenen Erde, Verfahren zur Herstellung derselben und Verwendung derselben als Katalysator

Katalysatorträger und Katalysator zur Behandlung von Motorabgasen und Verfahren zu deren Herstellung.

Pyrogenically-produced cerium oxide useful in polishing sensitive electronics surfaces, as a heat stabilizer for silicone rubber or as a catalyst has specified coarse and fine fractions

Pyrogenically-produced cerium oxide of BET surface area 15-200 m2/g comprises: (a) a coarse fraction of crystalline, non- aggregated particles of average diameter 30-200 nm; and (b) a fine fraction of fine, crystalline aggregated primary particles of average aggregate diameter 5-50 nm. An Independent claim is also included for production of the cerium oxide.

Hitzebeständiger Katalysatorträger

Supported catalyst for redn. of nitrogen oxide with ammonia - contg. base transition metal cpd. on titanium oxide and clay mineral

Catalyst for the vapour phase redn. of N oxides with ammonia consists of a base transition metal cpd. (I) on a shaped support of Ti oxide and a clay mineral with an average particle size of 0.1-100 mu m. The support can also contain, as an additional component, a fibrous inorganic material, silica hydrogel and/or silica sol. (I) is pref. an oxide of a gp. IB, VIB, VB, VIIB or VIII metal or Ce, esp. Cu, V, Cr, Mo, W, Mn, Fe or Ce. Catalyst is esp. useful for the treatment of waste gases from boilers. It has high activity, is stable for long periods and has superior strength. It catalyses the redn. of NOx in waste and exhaust gases to N2 and water.

Verfahren zum Halogen-Fluor-Austausch in organischen Verbindungen und Katalysatoren hierzu.

KATALYTISCHER WANDSTROMFILTER, DER EINE MEMBRAN AUFWEIST

Die vorliegende Erfindung betrifft einen katalytischen Wandstrom-Monolith zur Verwendung in einem Emissionsbehandlungssystem, wobei der Monolith ein poröses Substrat umfasst und eine erste Fläche und eine zweite Fläche, die eine Längsrichtung dazwischen definieren, und eine erste und eine zweite Vielzahl von Kanälen, die sich in der Längsrichtung erstrecken, aufweist, wobei die erste Vielzahl von Kanälen eine erste Vielzahl von inneren Oberflächen liefert und an der ersten Fläche offen und an der zweiten Fläche geschlossen ist, und wobei die zweite Vielzahl von Kanälen an der zweiten Fläche offen und an der ersten Fläche geschlossen ist, wobei ein erstes katalytisches Material in dem porösen Substrat verteilt ist, wobei eine mikroporöse Membran in der ersten Vielzahl von Kanälen auf einem sich in Längsrichtung erstreckenden ersten Bereich der ersten Vielzahl von inneren Oberflächen bereitgestellt ist, und wobei der erste Bereich sich von der ersten Fläche über 75 % bis 95 % einer Länge ...

BENZINMOTOR MIT ABGASANLAGE ZUR VERBRENNUNG VON PARTIKELN

Verfahren zur Herstellung von gemischten Oxiden auf Zirkonium-Cer-Basis

KATALYSATOR ENTHALTEND EINE EINZELSCHICHT VON AKTIVEN METALLE, SEINE HERSTELLUNG UND SEINE VERWENDUNG BEI DER HERSTELLUNG VON KETONE

Synthesis of aldehyde, useful as intermediate for pharmaceutical and agricultural products and as flavoring agent, involves reacting carboxylic acid or its ester with hydrogen in the presence of a catalyst

Synthesis of aldehyde (I) involves reacting carboxylic acid (II) or its ester with hydrogen and water in gaseous phase, in the presence of a catalyst containing at least 60-99.9 weight% (wt.%) of zirconium oxide and 20 wt.% or less of lanthanides as catalyst active ingredients. Synthesis of aldehyde of formula (I) involves reacting carboxylic acid of formula (II) or its ester with hydrogen and water in the presence of a catalyst containing at least 60-99.9 wt.% of zirconium oxide and 20 wt.% or less of lanthanides as catalyst active ingredients. R<1>, R<2>, R<3>, R<4> = hydrogen, 1-6C alkyl, 3-8C cycloalkyl, aryl, 7-12C alkylphenyl or 7-12C phenylalkyl, preferably R<1>, R<2> together form 3-7C alicyclic ring, and preferably R<1>, R<3> = 1-4C alkoxy, phenoxy, methylamino, dimethylamino or halogen, more preferably R<1> = hydroxy or amino.

Three-way catalyst comprising extruded solid body.

A three way catalyst comprises an extruded solid body comprising: 10-100% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body; (ii) at least one metal is present throughout the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on a surface of the extruded solid body; or (iii) at least one metal is present throughout the extruded solid body, is present in a higher concentration at a surface of the extruded solid body and at least one precious metal is also carried in one or more coating layer(s) on the surface of the extruded solid body.

Diesel oxidation catalyst and exhaust system

Process for preparing electron deficient olefins

This invention relates to a process for producing electron deficient olefins, such as 2-cyanoacrylates, using an acid catalyzed Knoevenagel condensation reaction. The acid catalyst comprises a lanthanide (preferably yttrium) or a transition metal (preferably niobium) and one or more ligands. The precursors are preferably an ester with an additional electron withdrawing group and an aldehyde. Possible electron withdrawing groups include cyano (nitrile), alkoxy or aryloxy, carbonyls, halogens, nitro, isocyanate, sulfoxide, phosphine oxide and sulphonic acids. In an embodiment of the invention, ethylcyanoacetate is the electron deficient olefin precursor, paraformaldehyde is used as the aldehyde source and yttrium triflate (Y(CF3SO3)3) is used as the catalyst. The product is ethyl-2-cyanoacetate. The formation of bifunctional cyanoacrylates is also disclosed.

Gasoline particulate filter

Extruded SCR filter

A catalytic fragrance burner assembly and a method of manufacture therefor

Process for preparing electron deficient olefins

Exhaust system for a vehicular positive ignition internal combustion engine

Mesoporous materials

Non-PGM ammonia slip catalyst

Catalyst for cleaning exhaust gas

High activity water gas shift catalyst

A method of reducing carbon monoxide with no methane formation comprises passing a fuel gas through a water gas shift converter that includes a catalyst comprising a support consisting of a cerium oxide or a mixed metal oxide of cerium oxide and zirconium oxide or lanthanum oxide wherein the cerium oxide is between 20-80%, a methanation agent comprising copper, manganese or iron; optionally a noble metal, preferably platinum, and optionally a promoter selected from alkali metals or alkali earth metals. Catalysts comprising ceria/lanthania, ceria-zirconia and cerium oxide/copper oxide having platinum as the noble metal are disclosed. Doping of the ceria containing catalysts with Pt:Fe and Pt:Mn methanation agents is also disclosed.

CATALYST SYSTEM AND PROCEDURE FOR SELECTIVE ALKYLATION OF TOLUENE

Positive ignition engine comprising an exhaust system including a filter therefor

Filtering particulate matter from exhaust gas

A filter for filtering particulate matter (PM) from exhaust gas emitted from a positive ignition engine comprises a porous substrate 10 having inlet and outlet surfaces, wherein the inlet surfaces are separated from the outlet surfaces by a porous structure containing pores 12 of a first mean pore size. The porous structure is coated with a catalytic washcoat 14 comprising a plurality of solid particles, wherein the porous structure of the washcoated porous substrate contains pores 16 of a second mean pore size. The second mean pore size is less than the first mean pore size. The catalytic washcoat is a hydrocarbon trap comprising at least one molecular sieve which is un-metallised. Alternatively, the molecular sieve is catalysed with a platinum group metal. The washcoat may substantially cover surface pores of the porous structure or may sit substantially within the porous structure of the porous substrate. An exhaust system comprising the filter, a positive ignition engine comprising ...

Three-way catalyst and its use in exhaust systems

Oxidation catalyst

An oxidation catalyst comprises an extruded solid body comprising: 10-100% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface of the extruded solid body; (iii) at least one metal is present throughout the extruded solid body and is also present in a higher concentration at a surface of the extruded solid body; (iv) at least one metal is present throughout the extruded solid body and is also carried in one or more coating layers on a surface of the extruded solid body; or (v) at least one metal is present throughout the extruded ...

METHOD FOR FORMING HIGH SURFACE AREA CATALYST CARRIER AND CATALYST USING SAME

Catalyst compositions, their method of formulation and combustion processes using the catalyst compositions

The catalytic compositions comprise a catalytically active material which is homogeneously interspersed throughout a monolithic structure of ceramic composition. The composition is shaped into a unitary monolith which is employed as the catalyst structure. In the method the active material or materials are admixed with a ceramic material, which can be either active or inactive, in finely divided form and then shaped into the monolithic structure. The catalytic compositions are used with reactants in a combustion process.

Method for preparing ceramic catalysts

A ceramic catalyst of formula AA'MM'X prepared using sol-gel and ceramic methodologies comprises preparing a sol or slurry in an organic acid, alcohol or water of an alkaline earth metal component (A) preferably barium or strontium; a powdered or liquid transition metal component (M') selected from germanium, lead, silicon, tin, aluminium, gallium, antimony, bismuth or niobium; a powdered metal component (M) wherein M is selected from titanium or zirconium; and X is oxygen/s. The formula may optionally comprise A' selected from samarium or indium; The components are refluxed or mixed together, and the powder is dried and heated with a temperature program to calcination temperatures. The catalyst is for converting methane to higher hydrocarbons by oxidative condensation (or coupling) of methane (OCM). The OCM catalyst may be mixed with a second catalyst of formula NBC/S, for CO2-reforming of methane or dehydrogenation of ethane to ethylene, wherein N is a metal selected from Group IA or ...

Method of oxidizing excess CO in an exhaust gas

Catalytic filter having a soot-catalyst and an SCR catalyst

A catalytic filter is provided having a mixture of an SCR catalyst and a soot catalyst (CSF). The soot oxidation catalyst is a copper doped ceria, iron doped ceria or manganese doped ceria. The copper (Cu) doped ceria, iron (Fe) doped ceria or manganese (Mn) doped ceria, may also be doped with zirconia (zr) or zirconia and praseodymium (Pr) or zirconia and neodymium (Nd) or zirconia, praseodymium and neodymium. A further additional metal oxide may also be provided.

Exhaust system comprising CO slip catalyst

Metal oxide sterilizing catalyst, and sterilizing device and system including the same

Disclosed is a sterilizing catalyst, a sterilizing device and a sterilizing system, the sterilizing catalyst includes a metal lattice including a metal oxide, and an oxygen vacancy-inducing metal that is integrated or encompassed within the metal lattice. The metal oxide is an oxide of a divalent or multivalent metal. The oxygen vacancy-inducing metal has an oxidation number lower than that of the divalent or multivalent metal.

Process for producing fuel cell catalyst, fuel cell catalyst obtained by production process, and uses thereof

It is an object of the present invention to provide a production process which can produce a fuel cell catalyst having excellent durability and high oxygen reducing activity. The process for producing a fuel cell catalyst including a metal-containing oxycarbonitride of the present invention includes a grinding step for grinding the oxycarbonitride using a ball mill, wherein the metal-containing oxycarbonitride is represented by a specific compositional formula; balls in the ball mill have a diameter of 0.1 to 1.0 mm; the grinding time using the ball mill is 1 to 45 minutes; the rotating centrifugal acceleration in grinding using the ball mill is 2 to 20 G; the grinding using the ball mill is carried out in such a state that the metal-containing oxycarbonitride is mixed with a solvent containing no oxygen atom in the molecule; and when the ball mill is a planetary ball mill, the orbital centrifugal acceleration mill is 5 to 50 G.

Oxidation catalyst

An oxidation catalyst comprises an extruded solid body comprising: 10-95% by weight of at least one binder/matrix component; 5-90% by weight of a zeolitic molecular sieve, a non-zeolitic molecular sieve or a mixture of any two or more thereof; and 0-80% by weight optionally stabilised ceria, which catalyst comprising at least one precious metal and optionally at least one non-precious metal, wherein: (i) a majority of the at least one precious metal is located at a surface of the extruded solid body; (ii) the at least one precious metal is carried in one or more coating layer(s) on a surface; (iii) at least one metal is present throughout the extruded solid body and in a higher concentration at a surface; (iv) at least one metal is present throughout the extruded solid body and in a coating layer(s) on a surface; or (v) a combination of (ii) and (iii).

Hydrated Niobium Oxide Nanoparticle Containing Catalysts for Olefin Hydration

An olefin hydration catalyst and method for producing same is provided. The olefin hydration catalyst can be prepared by contacting a niobium containing compound with a strong Bronsted acid, such as sulfuric or phosphoric acid, to produce niobium oxo sulfate or niobium oxo phosphate nanoparticles. The nanoparticles can be separated, dried and utilized in a reactor for the hydration of olefins to their corresponding alcohols.

High-potential stable oxide support for polymer electrolyte fuel cell

Disclosed is an oxide and/or nitride support for electrode catalysts, which is used for electrodes for polymer electrolyte fuel cells (PEFC). The support for electrode catalysts is an aggregation body of primary particles of oxide of at least one kind of metal selected from rare earths, alkaline earths, transition metals, niobium, bismuth, tin, antimony, zirconium, molybdenum, indium, tantalum, and tungsten, and the aggregation body is configured such that at least 80% of the metal oxide primary particles having a size of 5 nm to 100 nm aggregate and bind each other to form dendritic or chain structures each of which is made of 5 or more of the metal oxide primary particles.

Complex oxide, method for producing same, and exhaust gas purifying catalyst

Disclosed are a composite oxide which is capable of maintaining a large volume of pores even used in a high temperature environment, and which has excellent heat resistance and catalytic activity, as well as a method for producing the composite oxide and a catalyst for exhaust gas purification employing the composite oxide. The composite oxide contains cerium and at least one element selected from aluminum, silicon, or rare earth metals other than cerium and including yttrium, at a mass ratio of 85:15 to 99:1 in terms oxides, and has a property of exhibiting a not less than 0.30 cm 3 /g, preferably not less than 0.40 cm 3 /g volume of pores with a diameter of not larger than 200 nm, after calcination at 900° C. for 5 hours, and is suitable for a co-catalyst in a catalyst for vehicle exhaust gas purification.

Composition containing oxides of zirconium, cerium and another rare earth having reduced maximum reducibility temperature, a process for preparation and use thereof in the field of catalysis

A composition is described that includes oxides of zirconium, cerium and another rare earth different from cerium, having a cerium oxide content not exceeding 50 wt % and, after calcination at 1000° C. for 6 hours, a maximal reducibility temperature not exceeding 500° C. and a specific surface of at least 45 m 2 /g. The composition can be prepared according to a method that includes continuously reacting a mixture that includes compounds of zirconium, cerium and another rare earth having a basic compound for a residence time not exceeding 100 milliseconds, wherein the precipitate is heated and contacted with a surfactant before calcination.

Catalyst containing oxygen transport membrane

A composite oxygen transport membrane having a dense layer, a porous support layer and an intermediate porous layer located between the dense layer and the porous support layer. Both the dense layer and the intermediate porous layer are formed from an ionic conductive material to conduct oxygen ions and an electrically conductive material to conduct electrons. The porous support layer has a high permeability, high porosity, and a microstructure exhibiting substantially uniform pore size distribution as a result of using PMMA pore forming materials or a bi-modal particle size distribution of the porous support layer materials. Catalyst particles selected to promote oxidation of a combustible substance are located in the intermediate porous layer and in the porous support adjacent to the intermediate porous layer. The catalyst particles can be formed by wicking a solution of catalyst precursors through the porous support toward the intermediate porous layer.

METHOD AND SYSTEM FOR FORMING PLUG AND PLAY METAL CATALYSTS

A metal catalyst is formed by vaporizing a quantity of metal and a quantity of carrier forming a vapor cloud. The vapor cloud is quenched forming precipitate nanoparticles comprising a portion of metal and a portion of carrier. The nanoparticles are impregnated onto supports. The supports are able to be used in existing heterogeneous catalysis systems. A system for forming metal catalysts comprises means for vaporizing a quantity of metals and a quantity of carrier, quenching the resulting vapor cloud and forming precipitate nanoparticles comprising a portion of metals and a portion of carrier. The system further comprises means for impregnating supports with the nanoparticles. 1. A method of making a metal catalyst comprising:a. providing a quantity of nanoparticles, wherein at least some of the nanoparticles comprise a first portion comprising catalyst material bonded to a second portion comprising a carrier;b. providing a quantity of supports; andc. combining the supports with the nanoparticles.2. The method of wherein the supports comprise pores and voids.3. The method of wherein the catalyst material comprises any among a list of at least one metal claim 1 , at least one metal alloy claim 1 , and any combination thereof.4. The method of wherein providing a quantity of nanoparticles comprises:a. loading a quantity of catalyst material and a quantity of carrier into a plasma gun in a desired ratio;b. vaporizing the quantity of catalyst material and quantity of carrier thereby forming a vapor cloud; andc. quenching the vapor cloud, thereby forming a quantity of nanoparticles.5. The method of wherein the carrier comprises an oxide.6. The method of wherein the oxide comprises silica claim 5 , alumina claim 5 , yttria claim 5 , zirconia claim 5 , titania claim 5 , ceria claim 5 , baria claim 5 , and any combination thereof.7. The method of wherein combining the supports with the nanoparticles comprises:a. suspending the nanoparticles in a solution, thereby forming a ...

Process for reprocessing spent catalysts

The invention relates to a process for reprocessing spent catalysts comprising rare earth metals, and to a process for producing a new styrene catalyst from a spent styrene catalyst.

STRUCTURED CATALYTIC NANOPARTICLES AND METHOD OF PREPARATION

A method of making a structured, doped, cerium oxide nanoparticle includes (a) forming a first reaction mixture including cerium(III), an optional metal ion other than cerium, a base, a stabilizer, and a solvent, (b) contacting the first reaction mixture with an oxidant, (c) forming a cerium oxide nanoparticle core by heating the product of step (b), (d) forming a second reaction mixture by combining with the first reaction mixture one or more metal ions other than cerium, and an optional additional quantity of cerium(III), and (e) forming a shell surrounding the core of cerium oxide by heating the second reaction mixture to produce a product dispersion of structured cerium oxide nanoparticles. 1. A method of making a structured , doped , cerium oxide nanoparticle , comprising:a. forming a first reaction mixture comprising cerium(III), an optional metal ion other than cerium, a base, a stabilizer, and a solvent;b. contacting said first reaction mixture with an oxidant;c. forming a cerium oxide nanoparticle core by heating the product of step b);d. forming a second reaction mixture by combining with the first reaction mixture one or more metal ions other than cerium, and an optional additional quantity of cerium(III); ande. forming a shell surrounding said core of cerium oxide by heating said second reaction mixture to produce a product dispersion of structured cerium oxide nanoparticles.2. The method of claim 1 , wherein the first reaction mixture further comprises one or more metal ions other than cerium; and wherein the identity and/or relative quantity of metal ions differs from that of the second reaction mixture.3. The method of claim 1 , wherein step d) further comprises addition of cerium (III) ions and oxidant.4. The method of claim 1 , wherein the heating of step c) or step e) raises the reaction mixture to about 50° C. to 100° C.5. The method of claim 1 , wherein the addition of metal ions in step d) is performed concurrently with the addition of the ...

CERIUM OXIDE HAVING HIGH CATALYTIC PERFORMANCE

A catalyst that includes cerium oxide having a fluorite lattice structure is provided. The cerium oxide includes cerium atoms in mixed valence states of Ce/Ce, in which the ratio of Ce/(Ce+Ce) in the lattice ranges from 40% to 90% at 20° C. The valence states Ce and Ce are reversible in reduction and oxidation reactions, and the cerium oxide maintains catalytic ability at temperatures at least up to 450° C. 1. A catalyst comprising:{'sup': 3+', '4+', '3+', '3+', '4+', '3+', '4+, 'cerium oxide having a fluorite lattice structure comprising cerium atoms in mixed valence states of Ce and Ce, in which the ratio of Ce/(Ce+Ce) in the lattice ranges from 40% to 90% at 20° C., the valence states Ce and Ce being reversible in reduction and oxidation reactions, the cerium oxide maintaining catalytic ability at temperatures at least up to 450° C.'}2. The catalyst of claim 1 , comprising small particles decorated near the surface of the fluorite structured cerium oxide lattice claim 1 , in which the surface region of the cerium oxide lattice structure has a higher concentration of the small particles than an inner region of the cerium oxide lattice structure claim 1 , the small particles having a diameter equal to or less than 1 nm.3. The catalyst of in which the small particles comprise at least one of gold claim 2 , tin claim 2 , palladium claim 2 , an alloy of gold and silver claim 2 , an alloy of gold and copper claim 2 , the oxide of the above claim 2 , or a combination of the above.4. The catalyst of in which the small particles comprise gold particles claim 3 , and the concentration of the gold particles on the cerium oxide ranges from 0.001 to 5.0 atomic percent compared to cerium.5. The catalyst of in which the concentration of the gold particles ranges from 0.005 to 0.02 atomic percent compared to cerium.6. The catalyst of in which the small particles comprise at least one of palladium particles or palladium oxide particles claim 3 , and the concentration of the ...

COMPOSITION CONTAINING OXIDES OF ZIRCONIUM, CERIUM AND AT LEAST ONE OTHER RARE EARTH AND HAVING A SPECIFIC POROSITY, METHOD FOR PREPARING SAME AND USE THEREOF IN CATALYSIS

A composition is described that includes zirconium oxide, cerium oxide and yttrium oxide, or zirconium oxide, cerium oxide and at least two oxides of two rare earths different from cerium in a mass proportion of at least 20% of zirconium oxide and of at most 70% of cerium oxide, wherein the composition further includes, after calcination at 900° C. for 4 hours, two populations of pores having respective diameters centered, for the first population, about a value of 20 nm to 40 nm and, for the second, about a value of 80 nm to 200 nm. The composition can be used for processing exhaust gases of internal combustion engines. 1. A composition comprising zirconium oxide , cerium oxide and yttrium oxide or comprising zirconium oxide , cerium oxide and at least two oxides of two rare earths other than cerium , in a weight proportion of zirconium oxide of at least 20% and of cerium oxide of at most 70% , wherein after calcination at a temperature of 900° C. for 4 hours , two populations of pores of which the respective diameters are centered , for the first population , about a value of 20 nm to 40 nm and , for the second population , about a value of 80 nm to 200 nm.2. The composition as defined by claim 1 , wherein the diameter of the first population of pores is centered about a value of 20 nm to 35 nm and the diameter of the second population of pores is centered about a value of 80 nm to 150 nm.3. The composition as defined by claim 1 , wherein after calcination at a temperature of 900° C. for 4 hours claim 1 , it has a total pore volume of at least 1.5 ml Hg/g.4. The composition as defined by claim 1 , wherein the composition comprises at least two oxides of two rare earths other than cerium and in which one of these rare earths is lanthanum claim 1 , in that it has a zirconium oxide content of at least 60% and in that claim 1 , after calcination at 1000° C. for 4 hours claim 1 , it is in the form of two different crystallographic phases claim 1 , at least one of which ...

CATALYST FOR REMOVING NITROGEN OXIDES FROM THE EXHAUST GAS OF DIESEL ENGINES

The invention relates to a catalyst for removal of nitrogen oxides from the exhaust gas of diesel engines, and to a process for reducing the level of nitrogen oxides in the exhaust gas of diesel engines. The catalyst consists of a support body of length L and of a catalytically active coating which in turn may be formed from one or more material zones. The material zones comprise a copper-containing zeolite or a zeolite-like compound. The materials used include chabazite, SAPO-34, ALPO-34 and zeolite β. In addition, the material zones comprise at least one compound selected from the group consisting of barium oxide, barium hydroxide, barium carbonate, strontium oxide, strontium hydroxide, strontium carbonate, praseodymium oxide, lanthanum oxide, magnesium oxide, magnesium/aluminum mixed oxide, alkali metal oxide, alkali metal hydroxide, alkali metal carbonate and mixtures thereof. Noble metal may optionally also be present in the catalyst. 1. A catalyst for removal of nitrogen oxides from the exhaust gas of diesel engines , comprised of a support body of length L and of a catalytically active coating composed of one or more material zones comprising:a zeolite or a zeolite-like compound containing 1-10% by weight of copper, based on the total weight of the zeolite or of the zeolite-like compound, the zeolite or the zeolite-like compound being selected from the group consisting of chabazite, SAPO-34, ALPO-34 and zeolite β; andat least one compound selected from the group consisting of barium oxide, barium hydroxide, barium carbonate, strontium oxide, strontium hydroxide, strontium carbonate, praseodymium oxide, lanthanum oxide, magnesium oxide, magnesium/aluminum mixed oxide, alkali metal oxide, alkali metal hydroxide, alkali metal carbonate and mixtures thereof.2. The catalyst as claimed in claim 1 ,whereinthe zeolite or the zeolite-like compound has an average mean pore size less than 4 Angstrom and is selected from the group consisting of chabazite, SAPO-34 and ...

NANOWIRE CATALYSTS AND METHODS FOR THEIR USE AND PREPARATION

Nanowires useful as heterogeneous catalysts are provided. The nanowire catalysts are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons. Related methods for use and manufacture of the same are also disclosed. 1. A catalytic nanowire comprising a combination of at least four different doping elements , wherein the doping elements are selected from a metal element , a semi-metal element and a non-metal element.2. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises a metal oxide.3. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises a lanthanide metal.4. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises LaO claim 1 , NdO claim 1 , YbO claim 1 , EuO claim 1 , SmO claim 1 , YO claim 1 , CeO claim 1 , PrOor combinations thereof.5. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises Ln1Ln2O claim 1 , wherein Ln1 and Ln2 are each independently a lanthanide element claim 1 , wherein Ln1 and Ln2 are not the same and x is a number ranging from greater than 0 to less than 4.6. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises LaNdO claim 1 , wherein x is a number ranging from greater than 0 to less than 4.7. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises LaNdO claim 1 , LaNdO claim 1 , LaNdO claim 1 , LaNdO claim 1 , LaNdO claim 1 , LaNdO claim 1 , LaNdOor combinations thereof.8. The catalytic nanowire of claim 1 , wherein the catalytic nanowire comprises a lanthanide oxide.9. The catalytic nanowire of claim 8 , wherein the lanthanide oxide comprises a mixed oxide.10. The catalytic nanowire of claim 9 , wherein the mixed oxide comprises Y—La claim 9 , Z—La claim 9 , P—La claim 9 , Ce—La or combinations thereof.11. The catalytic nanowire of claim 1 , wherein the doping elements are selected from Eu claim 1 , Na claim 1 , Sr claim 1 , Ca claim 1 , Mg claim 1 , Sm ...

Hydrogenation Catalysts with Cobalt-Modified Supports

The present invention relates to catalysts, to processes for making catalysts and to chemical processes employing such catalysts. The catalysts are preferably used for converting acetic acid to ethanol. The catalyst comprises a precious metal and one or more active metals on a modified support that comprises cobalt.

COMPOSITE, CATALYST INCLUDING THE SAME, FUEL CELL AND LITHIUM AIR BATTERY INCLUDING THE SAME

A composite including: a carbonaceous material; and a solid solution including a first metal and a cerium oxide, wherein the solid solution is disposed on the carbonaceous material. 1. A composite comprising:a carbonaceous material; anda solid solution comprising a first metal and a cerium oxide, wherein the solid solution is disposed on the carbonaceous material.2. The composite of claim 1 , wherein the first metal is at least one metal selected from Groups 3-8 claim 1 , 10-14 claim 1 , and 16.3. The composite of claim 2 , wherein the first metal is at least one selected from manganese (Mn) claim 2 , vanadium (V) claim 2 , copper (Cu) claim 2 , zinc (Zn) claim 2 , iron (Fe) claim 2 , cobalt (Co) claim 2 , and titanium (Ti).4. The composite of claim 3 , wherein the first metal is manganese.5. The composite of claim 1 , wherein the solid solution is present in an amount of about 5 to about 90 parts by weight claim 1 , based on 100 parts by weight of the composite.6. The composite of claim 1 , wherein an amount of the first metal is about 0.1 to about 1.5 moles claim 1 , based on 1 mole of cerium of the cerium oxide.7. The composite of claim 1 , wherein the composite comprises a composition represented by at least one selected from Formula 1 and Formula 2:{'br': None, 'sup': '1', 'sub': x', '2, 'MO—CeO/C\u2003\u2003Formula 1'}{'sup': '1', 'claim-text': {'br': None, 'sub': y', '1-y', '2, 'sup': '1', 'CeMO/C\u2003\u2003Formula 2'}, 'wherein in Formula 1, 1≦x≦3, Mis the first metal, and'}{'sup': '1', 'wherein in Formula 2, 0.01≦y≦0.99, Mis the first metal, and in Formulas 1 and 2, independently, the first metal is at least one metal selected from Groups 3-8, 10-14, and 16.'}8. The composite of claim 7 , wherein the first metal is manganese.9. A catalyst comprising the composite of and a second metal.10. The catalyst of claim 9 , wherein the second metal is at least one metal selected from Groups 8-11.11. The catalyst of claim 10 , wherein the second metal is at least one ...

Ce-BASED COMPOSITE OXIDE CATALYST, PREPARATION METHOD AND APPLICATION THEREOF

Disclosed is a Ce-based composite oxide catalyst for selective catalytic reducing nitrogen oxides with ammonia, which comprises Ce oxide and at least one oxide of transition metal except Ce. The Ce-based composite oxide catalyst is prepared by a simple method which uses non-toxic and harmless raw materials, and it has the following advantages: high catalytic activity, and excellent selectivity for generating nitrogen etc. The catalyst can be applied in catalytic cleaning plant for nitrogen oxides from mobile and stationary sources.

Method for the preparation of a catalysed particulate filter and catalysed particulate filter

Method for the preparation of a catalysed particulate filter and a particulate filter. The method comprises the steps of a) providing a catalyst wash coat with a first catalyst active in burning off of soot and a second catalyst active in selective catalytic reduction of nitrogen oxides; b) coating a particulate filter body with the catalyst wash coat on the dispersion side and the permeate side of the filter body and within partition walls of the filter body; and c) drying and heat treating the coated filter body to obtain the catalysed particulate filter.

METHOD OF CONDITIONING AN INTERNAL COMBUSTION ENGINE

A method of improving the efficiency of a diesel engine provided with a source of diesel fuel includes the steps of: a) adding to the diesel fuel a reverse-micellar composition having an aqueous first disperse phase that includes a free radical initiator and a first continuous phase that includes a first hydrocarbon liquid, a first surfactant, and optionally a co-surfactant, thereby producing a modified diesel fuel, and b) operating the engine, thereby combusting the modified diesel fuel. The efficiency of a diesel engine provided with a source of diesel fuel and a source of lubricating oil can also be improved by modifying the lubricating oil by the addition of a stabilized nanoparticulate composition of cerium dioxide. The efficiency of a diesel engine can also be improved by adding to the diesel fuel a reverse-micellar composition that includes an aqueous disperse phase containing boric acid or a borate salt. 1. A process of making nanoparticles , comprising:(a) forming an aqueous reaction mixture comprising cerous ion, hydroxide ion, an α-hydroxy carboxylic acid, and an oxidant; and(b) heating the reaction mixture to a temperature in the range of about 20° C. to about 100° C., thereby forming a product dispersion of cerium dioxide nanoparticles.2. The process according to claim 1 , wherein said α-hydroxy carboxylic acid is selected from the group consisting of lactic acid claim 1 , gluconic acid claim 1 , tartaric acid claim 1 , citric acid and 2-hydroxybutanoic acid.3. The process according to claim 2 , wherein said α-hydroxy carboxylic acid is lactic acid.4. The process according to claim 1 , wherein said reaction mixture further comprises a polyacid.5. The process according to claim 4 , wherein said polyacid is ethylenediaminetetraacetic acid.6. The process according to claim 5 , wherein said α-hydroxy carboxylic acid is lactic acid and said polyacid is ethylenediaminetetraacetic acid.7. The process according to claim 1 , wherein said oxidant is hydrogen ...

Neodymium-catalyzed polybutadienes

The invention relates to a high-molecular-weight, linear, neodymium-catalysed polybutadiene having a high proportion, >95%, of cis-1,4 units having a low proportion, <1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that Mooney viscosity (ML 1+4 100° C.) of the polybutadiene is from 70 to 90 and The molar-mass-polydispersity index of the polybutadiene is smaller than 10.

PROCESS FOR PREPARING PSEUDOIONONE

Use of pure lanthanum oxide which is obtained by calcination of oxygen-containing lanthanum salts at temperatures of at least 700° C. as heterogeneous catalyst in the aldol condensation of citral and acetone to give pseudoionone, and process for the preparation of pseudoionone by aldol condensation of citral and acetone in the liquid phase using pure lanthanum oxide. 1. The use of pure lanthanum oxide which is obtained by calcination of oxygen-containing lanthanum salts at temperatures of at least 700° C. as heterogeneous catalyst in the aldol condensation of citral and acetone to give pseudoionone.2. A process for the preparation of pseudoionone by aldol condensation of citral and acetone in the liquid phase , characterized in that pure lanthanum oxide which is obtained by calcination of oxygen-containing lanthanum salts at temperatures of at least 700° C. is used as heterogeneous catalyst. The present invention relates to a process for the preparation of pseudoionone and the catalysts used therein. More specifically, the present invention relates to the preparation of pseudoionone from citral (E/Z-3,7-dimethyl-2,6-octadien-1-al) and acetone in liquid phase with a heterogeneous catalyst, where the catalyst is lanthanum oxide that has been treated and/or prepared in a particular way. The invention also relates to the lanthanum oxide catalyst produced in this way.Pseudoionone (6,10-dimethyl-3,5,9-undecatrien-2-one) has juvenile hormone activity and is an important intermediate in the manufacture of vitamin A and E, carotenoids and fragrances. It is obtained primarily by the base-catalyzed aldol reaction of citral with acetone and the elimination of water, i.e. aldol condensation. The use of heterogeneous catalysts, particularly on inert supports, is advantageous since they can be easily separated off from the reaction medium and, optionally after regeneration, can be reused several times.WO 2003/047747 and WO 2003/047748 (publ. Jun. 12, 2003) describe metal oxide ...

HYDROGEN PRODUCTION CATALYST, METHOD FOR PRODUCING HYDROGEN AND HYDROGEN PRODUCTION APPARATUS USING THE SAME

A hydrogen production catalyst used for generating hydrogen by splitting water, the catalyst comprising a composite metal oxide of cerium oxide and praseodymium oxide. 1. A hydrogen production catalyst used for generating hydrogen by splitting water , the catalyst comprising a composite metal oxide of cerium oxide and praseodymium oxide.2. The hydrogen production catalyst according to claim 1 , whereina content ratio of the cerium oxide and the praseodymium oxide in the composite metal oxide is 95:5 to 5:95 in terms of an atomic ratio ([cerium]:[praseodymium]) of the metal elements.3. The hydrogen production catalyst according to claim 1 , whereinthe composite metal oxide further comprises aluminum oxide.4. The hydrogen production catalyst according to claim 3 , whereina content of the aluminum oxide is 5 to 50% by mass relative to a total amount of the cerium oxide, the praseodymium oxide, and the aluminum oxide.5. The hydrogen production catalyst according to claim 1 , whereinan average primary particle diameter of the composite metal oxide is 1 to 100 nm.6. The hydrogen production catalyst according to claim 1 , whereinafter heated in an inert gas atmosphere at 800° C. for 1 hour, the composite metal oxide has an average primary particle diameter of 15 nm or less.7. The hydrogen production catalyst according to claim 1 , whereinafter calcined in air at 1100° C. for 5 hours, the composite metal oxide satisfies the following conditions:{'sup': '3', 'a total pore volume of pores having pore diameters in a range from 1 nm to 0.1 μm measured by a nitrogen adsorption method is 0.18 cm/g or more; and'}{'sup': '3', 'a total pore volume of pores having pore diameters in a range from 0.1 μm to 10 μm measured by a mercury intrusion method is 0.2 cm/g or more.'}8. A method for producing hydrogen claim 1 , in which the hydrogen production catalyst according to is used claim 1 , the method comprising:a step (A) of thermally reducing the hydrogen production catalyst; anda step ...

METHOD AND SYSTEM FOR FORMING PLUG AND PLAY METAL COMPOUND CATALYSTS

A metal compound catalyst is formed by vaporizing a quantity of catalyst material and a quantity of carrier thereby forming a vapor cloud, exposing the vapor cloud to a co-reactant and quenching the vapor cloud. The nanoparticles are impregnated onto supports. The supports are able to be used in existing heterogeneous catalysis systems. A system for forming metal compound catalysts comprises means for vaporizing a quantity of catalyst material and a quantity of carrier, quenching the resulting vapor cloud, forming precipitate nanoparticles comprising a portion of catalyst material and a portion of carrier, and subjecting the nanoparticles to a co-reactant. The system further comprises means for impregnating the of supports with the nanoparticles. 129-. (canceled)30. A metal compound catalyst prepared by a method comprising: i. loading a quantity of catalyst material in powder form and a quantity of carrier comprising an oxide into a plasma gun in a desired ratio;', 'ii. vaporizing the quantity of catalyst material and the quantity of carrier by the plasma gun, thereby forming a vapor cloud;', 'iii. quenching the vapor cloud received from the plasma gun, thereby forming precipitate nanoparticles; and', 'iv. injecting a co-reactant into a substantially low oxygen environment such that the co-reactant will react with one of the vapor cloud, the precipitate nanoparticles, and any combination thereof,, 'a. providing a quantity of nanoparticles, comprising the stepswherein at least some of the nanoparticles comprise a first portion comprising a catalyst material bonded to a second portion comprising a carrier, wherein the carrier comprises an oxide;b. providing a quantity of supports comprising a same oxide as in the carrier loaded in the plasma gun;c. combining the supports with the nanoparticles; andd. forming a structure having the catalyst material bonded with the carrier, wherein the carrier is bonded with the support through an oxide-oxide bond.31. The metal ...

EXHAUST GAS PURIFYING CATALYST, EXHAUST GAS PURIFYING MONOLITH CATALYST, AND METHOD FOR MANUFACTURING EXHAUST GAS PURIFYING CATALYST

An exhaust gas purifying catalyst having a high purifying ability even if noble metal is not used as an essential component, an exhaust gas purifying monolith catalyst, and a method for manufacturing an exhaust gas purifying catalyst, are provided. The exhaust gas purifying catalyst includes an oxide having an oxygen storage and release capacity, and an oxide represented by the following formula (1) supported on the oxide having the oxygen storage and release capacity, 19.-. (canceled)10. An exhaust gas purifying catalyst , comprising:an oxide having an oxygen storage and release capacity; and {'br': None, 'sub': x', '1-x', '3-δ, 'LaMM′O\u2003\u2003(1)'}, 'an oxide represented by formula (1) supported on the oxide having the oxygen storage and release capacity,'}(wherein La represents lanthanum, M represents at least one element selected from the group consisting of barium (Ba), strontium (Sr) and calcium (Ca), M′ represents at least one element selected from the group consisting of iron (Fe), cobalt (Co), nickel (Ni) and manganese (Mn), δ represents an oxygen deficiency amount, and x and δ fulfill conditions represented by 0 Подробнее

Catalyst for purifying exhaust gas

Provided is a catalyst for purifying an exhaust gas, the catalyst excelling in catalytic performance and oxygen storage capacity. The catalyst for purifying an exhaust gas is a catalyst for purifying an exhaust gas which includes a ceria-zirconia composite oxide having a pyrochlore structure and a ceria-zirconia composite oxide having a cubic crystal structure, wherein at least a part of the ceria-zirconia composite oxide is composited with the ceria-zirconia composite oxide.

CARRIER FOR INTERNAL-COMBUSTION ENGINE EXHAUST GAS PURIFICATION CATALYST

An internal combustion engine exhaust gas purifying catalyst carrier has a core body formed of a CeO—ZrOsolid solution or a CeO—ZrO—LaOsolid solution, and CeOsupported on the surface of the core body, wherein the core body has a CeOcontent of 5 to 35 mass % and an LaOcontent of 0 to 10 mass %, on the basis of the mass of the carrier, and the amount of CeOsupported on the core body is 5 to 17 mass %, on the basis of the mass of the carrier. 1. An internal combustion engine exhaust gas purifying catalyst carrier comprising:{'sub': 2', '2, 'a core body formed of a CeO—ZrOsolid solution, and'}{'sub': 2', '2, 'CeOsupported on the surface of the core body, wherein the core body has a CeOcontent of 5 to 35 mass %, on the basis of the mass of the carrier, and'}{'sub': '2', 'the amount of CeOsupported on the core body is 5 to 17 mass %, on the basis of the mass of the carrier.'}2. An internal combustion engine exhaust gas purifying catalyst carrier comprising:{'sub': 2', '2', '2', '3', '2', '2', '2', '3', '2, 'a core body formed of a CeO—ZrO—LaOsolid solution, and CeOsupported on the surface of the core body, wherein the core body has a CeOcontent of 5 to 35 mass % and an LaOcontent of 1 to 10 mass %, on the basis of the mass of the carrier, and the amount of CeOsupported on the core body is 5 to 17 mass %, on the basis of the mass of the carrier.'}3. The internal combustion engine exhaust gas purifying catalyst carrier according to claim 1 , wherein the amount of CeOin the core body is 5 to 30 mass % claim 1 , on the basis of the mass of the carrier claim 1 , and the amount of CeOsupported on the core body is 5 to 15 mass % claim 1 , on the basis of the mass of the carrier.4. The internal combustion engine exhaust gas purifying catalyst carrier according to claim 2 , wherein the amount of CeOin the core body is 5 to 30 mass % claim 2 , on the basis of the mass of the carrier claim 2 , and the amount of CeOsupported on the core body is 5 to 15 mass % claim 2 , on the basis ...

COMPOSITION BASED ON OXIDES OF ZIRCONIUM, OF CERIUM, OF AT LEAST ONE RARE EARTH OTHER THAN CERIUM AND OF SILICON, PREPARATION PROCESSES AND USE IN CATALYSIS

The composition according to the invention is based on zirconium oxide, cerium oxide and at least one oxide of a rare earth other than cerium, in a proportion, by weight, of zirconium oxide of at least 5% and of cerium oxide of at most 90%, and it is characterized in that it additionally comprises silicon oxide in an amount, by weight, of between 0.1% and 2%. This composition may be used in catalysis, in particular in systems for treating the exhaust gases of internal combustion engines. 1. A composition based on zirconium oxide , cerium oxide and at least one oxide of a rare earth metal other than cerium , wherein the composition comprises: at least 5% by weight zirconium oxide , cerium oxide in an amount of less than 90% by weight , and silicon oxide in an amount between 0.1% and 2% by weight.2. The composition as claimed in claim 1 , wherein the composition comprises the silicon oxide in an amount between 0.1% and 1% by weight.3. The composition as claimed in claim 1 , wherein the composition comprises the silicon oxide in an amount between 0.1% and 0.6% by weight.4. The composition as claimed in claim 1 , wherein the composition comprises the cerium oxide in an amount between 30% and 60% by weight.5. The composition as claimed in claim 1 , wherein the composition comprises the cerium oxide in an amount between 5% and 20% by weight.6. The composition as claimed in claim 1 , wherein the composition comprises the at least one oxide of the rare earth metal other than cerium in an amount between 5% and 25% by weight.7. The composition as claimed in claim 1 , wherein the composition exhibits claim 1 , after calcination for 4 hours at 1000° C. and then calcination for 10 hours at 1200° C. claim 1 , a decrease in its oxygen storage capacity (OSC) of at least 80% claim 1 , more particularly of at least 90%.8. The composition as claimed in claim 1 , wherein the composition exhibits claim 1 , after calcination for 4 hours at 1000° C. claim 1 , an OSC of at least 0.6 ml O/g ...

CERIA-ZIRCONIA-MIXED OXIDE PARTICLES AND PROCESS FOR THEIR PRODUCTION BY PYROLYSIS

Described is a process for the production of mixed oxide particles. The process comprises providing a mixture comprising a solvent, one or more precursor compounds of ceria, one or more precursor compounds of zirconia, and one or more precursor compounds of one or more rare earth oxides other than ceria and/or one or more precursor compounds of yttria; forming an aerosol of the mixture; and pyrolyzing the aerosol of to obtain mixed oxide particles. The content of the rare earth oxides other than ceria and/or of yttria in the mixed oxide particles is comprised in the range of from 0.1 to 4.9 wt.-% based on the total weight of the rare earth oxides, yttria, and zirconia contained in the mixed oxide particles. Also describes are mixed oxide particles obtained from flame spray pyrolysis and to their use as an oxygen storage component, a catalyst, and/or as a catalyst support. 1. A process for the production of mixed oxide particles comprising:(1) providing a mixture comprising a solvent, one or more precursor compounds of ceria, one or more precursor compounds of zirconia, and one or more precursor compounds of one or more rare earth oxides other than ceria and/or one or more precursor compounds of yttria;(2) forming an aerosol of the mixture; and(3) pyrolyzing the aerosol to obtain mixed oxide particles;wherein the content of the rare earth oxides other than ceria and/or of yttria in the mixed oxide particles is in the range of from 0.1 to 4.9 wt.-% based on the total weight of the rare earth oxides, yttria, and zirconia contained in the mixed oxide particles.2. The process of claim 1 , wherein the one or more rare earth oxides other than ceria is selected from the group consisting of lanthana claim 1 , praseodymia claim 1 , neodymia claim 1 , and mixtures of two or three thereof.3. The process of claim 1 , wherein the concentration of the one or more precursor compounds of the one or more rare earth oxides other than ceria and/or of the one or more precursor compounds ...

COMPOSITION BASED ON ZIRCONIUM OXIDE AND ON AT LEAST ONE OXIDE OF A RARE EARTH OTHER THAN CERIUM, HAVING A SPECIFIC POROSITY, PROCESSES FOR PREPARING SAME AND USE THEREOF IN CATALYSIS

A composition of zirconium oxide and at least one oxide of a rare earth other than cerium is described. The zirconium oxide has a weight proportion of at least 50% and, after calcination at a temperature of 900° C. for 4 hours, the composition exhibits two populations of pores of which their respective diameters are centered. The diameter of the first pore has a value of from 20 nm to 40 nm and in the second pore has a value of from 80 nm to 200 nm. Further described is how the composition can be used for treating the exhaust gases of internal combustion engines. 1. A composition comprising zirconium oxide and at least one oxide of a rare earth other than cerium , in a weight proportion of zirconium oxide of at least 50% , wherein after calcination at a temperature of 900° C. for 4 hours , the composition exhibits , two populations of pores of which respective diameters are centered , for a first population , about a value of between 20 nm and 40 nm and , for a second population , about a value of between 80 nm and 200 nm.2. The composition as defined by claim 1 , wherein the diameter of the first population of pores is centered about a value of between 20 nm and 35 nm and the diameter of the second population of pores is centered about a value of between 80 nm and 150 nm.3. The composition as defined by claim 1 , wherein after calcination at a temperature of 900° C. for 4 hours claim 1 , it has a total pore volume of at least 1.3 ml Hg/g.4. The composition as defined by claim 1 , wherein after calcination at 1100° C. for 4 hours claim 1 , it exhibits a population of pores of which the diameter is centered about a value of between 30 nm and 70 nm.5. The composition as defined by claim 1 , wherein after calcination at 1100° C. for 4 hours claim 1 , it has a total pore volume of at least 0.9 ml Hg/g.6. The composition as defined by claim 1 , wherein the composition based on oxides of at least two rare earths other than cerium.7. The composition as defined by claim 1 , ...

INORGANIC OXIDE MATERIAL

The present teachings are directed to inorganic oxide materials that include AlO, CeO, and at least one of MgO and PrO. The present teachings are also directed to catalysts having at least one noble metal supported on these inorganic oxide materials, as well as methods for treating exhaust gases from internal combustion engines using such catalysts. 1. An inorganic oxide material , comprising:{'sub': 2', '3, '(a) from about 25 to about 90 pbw AlO;'}{'sub': '2', '(b) from about 5 to about 35 pbw CeO;'}(c)(i) from about 5 to about 35 pbw MgO, or{'sub': 6', '11, '(c)(ii) from about 2 to about 20 pbw PrO, or'}{'sub': 6', '11, '(c)(iii) from about 5 to about 35 pbw MgO, and from about 2 to about 20 pbw PrO; and'}(d) optionally up to about 10 pbw of a combined amount of oxides of one or more dopants selected from transition metals, rare earths, and mixtures thereof.2. The inorganic oxide material of claim 1 , wherein the material comprises from about 40 to about 80 pbw AlOand from about 10 to about 30 pbw CeO.3. (canceled)4. The inorganic oxide material of claim 1 , wherein the material comprises from about 10 to about 30 pbw MgO.5. The inorganic oxide material of claim 1 , wherein the material comprises from about 5 to about 15 pbw PrO.6. The inorganic oxide material of claim 1 , wherein the material comprises from about 10 to about 30 pbw MgO and from about 5 to about 15 pbw PrO.7. The inorganic oxide material of claim 1 , wherein the material comprises from about 1 to about 10 pbw of an oxide or a mixture of oxides selected from YO claim 1 , LaO claim 1 , NdOand GdO.8. The inorganic oxide material of claim 1 , wherein the material comprises from about 1 to about 4 pbw LaO.9. The inorganic oxide material of claim 1 , wherein the material comprises (a) crystallites comprising AlOand at least one oxide selected from MgO and PrO claim 1 , and (b) crystallites comprising CeO.11. The inorganic oxide material of claim 10 , wherein the material comprises from about 40 to about ...

INORGANIC COMPOSITE OXIDES AND METHODS OF MAKING THE SAME

Described herein are methods for forming inorganic composite oxides. Such methods include combining, at a substantially constant pH of between about 5 and about 6.75 over a period of at least about 5 minutes, an acidic precursor composition and a basic composition to form a precipitate composition, wherein the acidic precursor composition comprises an alumina precursor, a ceria precursor, a zirconia precursor and optionally one or more dopant precursors; stabilizing the precipitate by increasing the pH of the precipitate composition to between about 8 and about 10; and calcining the stabilized precipitate to form an inorganic composite oxide. Also described are inorganic composite oxides formed using such methods. 1. A method for forming an inorganic composite oxide , the method comprising:combining, at a substantially constant pH of between about 5 and about 6.75 over a period of at least about 5 minutes, an acidic precursor composition and a basic composition to form a precipitate composition, wherein the acidic precursor composition comprises an alumina precursor, a ceria precursor, a zirconia precursor and optionally one or more dopant precursors;stabilizing the precipitate by increasing the pH of the precipitate composition to between about 8 and about 10; andcalcining the stabilized precipitate to form an inorganic composite oxide.2. The method according to claim 1 , wherein the substantially constant pH is maintained by (a) controlling a flow rate of the acidic precursor composition claim 1 , the basic composition or both or (b) controlling a concentration of the acidic precursor composition claim 1 , the basic composition or both or (c) controlling a flow rate and a concentration of the acidic precursor composition claim 1 , the basic composition or both.34-. (canceled)5. The method according to claim 1 , wherein the acidic precursor composition and the basic composition are combined at a substantially constant pH of between about 5.5 and about 6.5 over a ...

SYNTHESIS OF OXYGEN-MOBILITY ENHANCED CEO2 AND USE THEREOF

Disclosed are catalysts capable of catalyzing the dry reforming of methane. The catalysts have a core-shell structure with the shell surrounding the core. The shell has a redox-metal oxide phase that includes a metal dopant incorporated into the lattice framework of the redox-metal oxide phase. An active metal(s) is deposited on the surface of the shell. 1. A catalyst capable of catalyzing a dry reformation of methane reaction , the catalyst comprising a core-shell structure having:a metal oxide core, a clay core, or a zeolite core;a shell surrounding the core, wherein the shell has a redox-metal oxide phase that includes a metal dopant incorporated into the lattice framework of the redox-metal oxide phase; andan active metal deposited on the surface of the shell.2. The catalyst of claim 1 , wherein the redox-metal oxide phase is cerium oxide (CeO) and the metal dopant is niobium (Nb) claim 1 , indium (In) claim 1 , or lanthanum (La) claim 1 , or any combination thereof.3. The catalyst of claim 2 , wherein the metal oxide core is an alkaline earth metal aluminate core selected from aluminate claim 2 , magnesium aluminate claim 2 , calcium aluminate claim 2 , strontium aluminate claim 2 , barium aluminate claim 2 , or any combination thereof.4. The catalyst of claim 3 , wherein the alkaline earth metal aluminate core is magnesium aluminate.5. The catalyst of claim 4 , comprising:65 wt. % to 85 wt. % magnesium aluminate;10 wt. % to 20 wt. % cerium oxide; and5 wt. % to 10 wt. % nickel.6. The catalyst of claim 5 , comprising 0.5 wt. % to 2 wt. % of niobium incorporated into the lattice framework of the cerium oxide phase.7. The catalyst of claim 5 , comprising 0.5 wt. % to 2 wt. % of indium incorporated into the lattice framework of the cerium oxide phase.8. The catalyst of claim 5 , comprising 0.5 wt. % to 2 wt. % of lanthanum incorporated into the lattice framework of the cerium oxide phase.9. The catalyst of claim 2 , wherein the metal oxide core is AlO.10. The ...

COMPLEX OXIDE, METHOD FOR PRODUCING SAME, AND EXHAUST GAS PURIFYING CATALYST

Disclosed are a composite oxide which is capable of maintaining a large volume of pores even used in a high temperature environment, and which has excellent heat resistance and catalytic activity, as well as a method for producing the composite oxide and a catalyst for exhaust gas purification employing the composite oxide. The composite oxide contains cerium and at least one element selected from aluminum, silicon, or rare earth metals other than cerium and including yttrium, at a mass ratio of 85:15 to 99:1 in terms oxides, and has a property of exhibiting a not less than 0.30 cm/g, preferably not less than 0.40 cm/g volume of pores with a diameter of not larger than 200 nm, after calcination at 900° C. for 5 hours, and is suitable for a co-catalyst in a catalyst for vehicle exhaust gas purification. 1. A composite oxide comprising (A) cerium and (B) at least one element selected from the group consisting of aluminum , silicon , and rare earth metals other than cerium ,wherein a mass ratio of (A):(B) in the composite oxide is 85:15 to 99:1 in terms oxides, and{'sup': '3', 'wherein the composite oxide has a property of exhibiting a not less than 0.30 cm/g volume of pores with a diameter of not larger than 200 nm, after calcination at 900° C. for 5 hours.'}2. The composite oxide according to claim 1 , having a property of exhibiting a not less than 0.40 cm/g volume of pores with a diameter of not larger than 200 nm claim 1 , after calcination at 900° C. for 5 hours.3. The composite oxide according to claim 1 , having a property of exhibiting a not less than 0.50 cm/g volume of pores with a diameter of not larger than 200 nm claim 1 , after calcination at 900° C. for 5 hours.4. The composite oxide according to claim 1 , having a property of exhibiting a not less than 0.32 cm/g volume of pores with a diameter of not larger than 200 nm claim 1 , after calcination at 800° C. for 5 hours.5. The composite oxide according to claim 1 , comprising at least silicon as (B) ...

GOLD-BASED CATALYST FOR THE OXIDATIVE ESTERIFICATION OF ALDEHYDES TO OBTAIN CARBOXYLIC ESTERS

Catalysts for oxidative esterification can be used, for example, fro converting (meth)acrolein to methyl (meth)acrylate. The catalysts are especially notable for high mechanical and chemical stability even over very long time periods, including activity and/or selectivity relatively in continuous operation in media having even a small water content. 1. A hydrolysis-resistant catalyst , comprising:a) 0.01 to 10 mol % of gold,b) 40 to 94 mol % of silicon,c) 3 to 40 mol % of aluminium, andd) 2 to 40 mol % of at least one element selected from the group consisting of alkali metals, alkaline earth metals, lanthanoids having atomic numbers 57 to 71, Y, Sc, Ti, Zr, Cu, Mn, Pb and Bi,wherein components b) to d) are present as oxides and the stated amounts of components a) to d) relate to 100 mol % of the composition of the catalyst without oxygen,wherein the catalyst is in the form of particles and is suitable for the oxidative esterification of aldehydes to carboxylic esters,wherein the catalyst has a shell structure comprising a core and at least one shell, where at least 80% of the total amount of component a) is part of a shell, andwherein the catalyst has a PZC value between 7 and 11.2. The catalyst according to claim 1 , which claim 1 , except for the oxygen claim 1 , consists of components a) to d).3. The catalyst according to claim 1 , wherein the catalyst comprises between 0.05 and 2 mol % of component a).4. The catalyst according to claim 1 , wherein component a) is in the form of particles having a mean diameter between 2 and 10 nm.5. The catalyst according to claim 1 , wherein the catalyst particles have an average diameter between 10 and 200 μm and a spherical shape.6. The catalyst according to claim 1 , wherein the catalyst comprises between 2 and 30 mol % of Mg claim 1 , Ce claim 1 , La claim 1 , Y claim 1 , Zr claim 1 , Mn claim 1 , Pb and/or Bi as component d).7. The catalyst according to claim 1 , wherein the catalyst has a core and two shells claim 1 , ...

OXIDATION CATALYST FOR COMPRESSED NATURAL GAS COMBUSTION SYSTEM EXHAUST GAS

The present invention provides a catalyst composition for inhibiting the inactivation of a catalyst for purification of compressed natural gas combustion system exhaust gas on which a noble metal component comprising platinum and palladium is supported. An oxidation catalyst, for a compressed natural gas vehicle or static combustion system exhaust gas, in which a first alumina impregnated with platinum, a second alumina impregnated with palladium, and a ceria component are supported on a ceramic support, has a barium cocatalyst supported on the first alumina, thereby greatly inhibiting inactivation of a CNG lean burn engine catalyst. 1. A catalyst for improving oxidation activity on an exhaust gas from a compressed natural gas vehicle or static combustion system in excess air , the catalyst being configured such that a platinum-impregnated first alumina , a palladium-impregnated second alumina and a ceria component are loaded on a ceramic support and the first alumina is further impregnated with a barium cocatalyst so as to improve oxidation activity on methane , which is an exhaust gas component from a compressed natural gas vehicle or static combustion system , in excess air.2. The catalyst of claim 1 , wherein the cocatalyst is added in an amount of 1 to 10 wt % based on an amount of platinum.3. The catalyst of claim 1 , wherein a weight ratio of platinum and palladium impregnated respectively on the first alumina and the second alumina is 1:1 to 1:10. The present invention relates to an exhaust gas oxidation catalyst for a compressed natural gas combustion system, and more particularly to an exhaust gas purification catalyst for a compressed natural gas lean-burn engine, in which a conventional exhaust gas purification catalyst for a compressed natural gas lean-burn engine, loaded with noble metal components containing platinum and palladium, is further impregnated with a specific component serving as a cocatalyst to thus prevent catalyst deactivation.The use of ...

METHOD FOR THE PREPARATION OF A CATALYSED MONOLITH

Method for the preparation of a catalysed monolithic body or a catalysed particulate filter by capillary suction of sol-solution containing catalytically active material and metal oxide catalyst carriers or precursors thereof into pores of monolithic substrate. 1. A method for the preparation of a catalysed monolith , comprising the steps ofa) providing a porous monolith substrate with a plurality of longitudinal flow channels separated by gas permeable partition walls, the monolith substrate having a first end face and at a distance to the first end face a second end face;b) in a container providing a sol solution at least in an amount corresponding to pore volume of the gas permeable partition walls, the sol solution containing a water soluble or colloidal precursor of one or more catalytically active compounds and a water soluble or colloidal precursor of one or more metal oxides catalyst carrier compounds, at least one of the one or more precursors is colloid and at least one of the one or more precursors is water soluble;c) placing the monolith substrate substantially vertically in the container with the first or second end face dipped into the sol solution;d) sucking up the sol solely by capillary forces into pores of the permeable partition walls from the end face dipped into the sol solution without applying vacuum or pressure to a predetermined distance in the permeable partition walls from the end face dipped into the sol solution;e) subsequently inverting the monolith substrate and placing the monolith substrate substantially vertically in the container with the opposite end face dipped into the sol solution;f) sucking up the sol solely by capillary forces into pores of the permeable partition walls from the opposite end face dipped into the sol solution without applying vacuum or pressure; andg) drying and calcining the thus coated monolith substrate.2. The method of claim 1 , wherein the predetermined distance is about half of the whole distance between ...

CATALYST, AND METHOD FOR DIRECT CONVERSION OF SYNGAS TO PREPARE LIGHT OLEFINS

A process for direct synthesis of light olefins uses syngas as the feed raw material. This catalytic conversion process is conducted in a fixed bed or a moving bed using a composite catalyst containing components A and B (A+B). The active ingredient of catalyst A is metal oxide; and catalyst B is an oxide supported zeolite. A carrier is one or more of AlO, SiO, TiO, ZrO, CeO, MgO and GaOhaving hierarchical pores; the zeolite is one or more of CHA and AEI structures. The loading of the zeolite is 4%-45% wt. A weight ratio of the active ingredients in the catalyst A and the catalyst B is within a range of 0.1-20, and preferably 0.3-5. The total selectivity of the light olefins comprising ethylene, propylene and butylene can reach 50-90%, while the selectivity of a methane byproduct is less than 15%. 1. A catalyst , wherein the catalyst is a composite catalyst composed of A+B; the catalyst component A and the catalyst component B are compounded by mechanical mixing method; the active ingredients of the catalyst component A are active metal oxides; the catalyst component B are supported zeolites; the carrier is at least one of porous AlO , SiO , TiO , ZrO , CeO , MgO and GaO; the zeolite is at least one of CHA and AEI structures; the loading of the zeolite is 4%-45% wt; and the active metal oxide is at least one of MnO , MnCrO , MnAlO , MnZrO , ZnO , ZnCrO , ZnAlO , CoAlOand FeAlO.2. The catalyst according to claim 1 , wherein at least one of porous AlO claim 1 , SiO claim 1 , TiO claim 1 , ZrO claim 1 , CeO claim 1 , MgO and GaOin the catalyst component B is used as the carrier; specific surface area is 30-250 m/g; pore volume is 0.25-0.80 ml/g; through calculation according to the specific surface area claim 1 , mesoporous specific surface area occupies 30-75% and macroporous specific surface area occupies 25-70%; and the zeolite is used as an active component and dispersed on the carrier by in situ growth or physical mixing mode.3. The catalyst according to claim 1 , ...

PROCESS FOR THE DEHYDRATION OF OXYGENATED COMPOUNDS

The present invention relates to a process for the dehydration of at least one oxygenated compound, preferably selected from saturated alcohols, unsaturated alcohols, diols, ethers, in the presence of at least one dehydration catalyst selected from cerium oxide (CeO), aluminium oxide (γ-AlO), aluminium silicate, silica-aluminas (SiO-AlO), aluminas, zeolites, sulfonated resins, ion-exchange resins, metal oxides (for example, lanthanum oxide, zirconium oxide, tungsten oxide, thallium oxide, magnesium oxide, zinc oxide); of at least one basic agent selected from ammonia (NH), or from inorganic or organic compounds containing nitrogen capable of developing ammonia (NH) during said dehydration process; and, optionally, of silica (SiO), or of at least one catalyst for the dissociation of ammonia (NH) selected from catalysts comprising silica (SiO), preferably of silica (SiO). 1. A process comprising dehydrating at least one oxygenated compound in the presence of{'sub': 2', '2', '3', '2', '2', '3, '(i) at least one dehydration catalyst selected from the group consisting of cerium oxide (CeO), aluminum oxide (γ-AlO), aluminum silicate, silica-alumina (SiOAlO) alumina, a zeolite, a sulfonate resin, an ion exchange resin, and a metal oxide;'}{'sub': 3', '3, '(ii) at least one basic agent selected from the group consisting of ammonia (NH) and an inorganic or organic compound comprising nitrogen capable of developing ammonia (NH) during the dehydration; and'}{'sub': '2', '(iii) optionally silica (SiO).'}2. A process comprising dehydrating at least one oxygenated compound by feeding to a reactor a mixture comprising the oxygenated compound and at least one basic agent selected from the group consisting of ammonia (NH) and an inorganic or organic compound comprising nitrogen capable of developing ammonia (NH) during the dehydration , wherein the mixture is fed to the reactor so as to pass first through a first catalytic bed and subsequently through a second catalytic bed in the ...

Dialkyl carbonate production method

Provided is a dialkyl carbonate production method that enables a dialkyl carbonate to be produced in a simple manner and in a short reaction time and enables easy processing of by-products. This dialkyl carbonate production method involves generation reaction of a carbonate ester through reaction between carbon dioxide and an alcohol represented by formula (1), wherein the generation reaction of a carbonate ester is performed in the presence of a carbodiimide compound represented by formula (2) (R1-R3 in the formula are as described in the description of the present application).[Chemical formula 1]R1—OH  (1)[Chemical formula 2]R2—N═C═N—R3  (2)

EXHAUST-GAS PURIFICATION APPARATUS AND METHOD FOR MANUFACTURING SAME

An exhaust-gas purification apparatus includes: a honeycomb base material including a plurality of exhaust-gas flow paths partitioned by a porous wall; and one or more catalyst noble metals carried by the honeycomb base material. The catalyst noble metals are selected from the group consisting of platinum, palladium, and rhodium. The honeycomb base material has a noble metal concentrated surface section in which a 50%-by-mass noble metal carry depth for a specific noble metal that is one type among one or two catalyst noble metals is less than 50% of the distance from the surface to the center of the inside of the porous wall. The 50%-by-mass noble metal carry depth is the depth at which, when the amount of the specific noble metal carried between the surface and the center of the inside of porous wall is used as a reference, 50% by mass of specific noble metal is carried. 1. An exhaust gas purification device comprising a honeycomb substrate having a plurality of exhaust gas flow paths separated by a porous wall , and one or more catalyst noble metals which are carried by the honeycomb substrate , whereinthe honeycomb substrate includes ceria-zirconia composite oxide particles as a constituent material,the catalyst noble metals are selected from the group consisting of platinum, palladium, and rhodium, 'a noble metal-enriched surface part in which a 50 mass % noble metal carrying depth of a specific noble metal, which is one of the one or more catalyst noble metals, is less than 50% of the distance from a surface of the porous wall to a center of an interior of the porous wall, and', 'the honeycomb substrate hasthe 50 mass % noble metal carrying depth is a depth in which 50 mass % of the specific noble metal is carried based on a quantity of the specific noble metal carried from the surface of the porous wall to the center of the interior of the porous wall.2. The exhaust gas purification device according to claim 1 , whereinthe specific noble metal is platinum or ...

PHOTOCATALYTIC DEGRADATION OF SUGAR

Systems having at least one photonic antenna molecule and at least one catalyst for degrading a sugar to degradation products using light energy are disclosed. Also disclosed are the devices and methods that use the systems for photocatalytically degrading a sugar into degradation products. 1. A system for photocatalytically degrading a sugar , the system comprising:at least one photonic antenna molecule; andat least one catalyst;wherein the photonic antenna molecule is capable of collecting a light energy and transferring the light energy to the catalyst; andwherein the catalyst is capable of degrading the sugar to produce at least one degradation product.2. The system of claim 1 , wherein the photonic antenna molecule is selected from the group consisting of 5-hydroxytryptamine claim 1 , an acridine claim 1 , an Alexa Fluor® dye claim 1 , an ATTO dye claim 1 , a BODIPY® dye claim 1 , Coumarin 6 claim 1 , a CY dye claim 1 , DAPI claim 1 , an ethidium compound claim 1 , a Hoechst dye claim 1 , Oregon Green claim 1 , rhodamine claim 1 , a compound comprising Ru(bpy) claim 1 , a compound comprising (Pt(pop)) claim 1 , a YOYO dye claim 1 , and a SeTau dye.3. The system of claim 1 , wherein the photonic antenna molecule is fluorescein.4. The system of claim 1 , wherein the catalyst is a metal nanoparticle.5. The system of claim 4 , wherein the metal nanoparticle comprises a metal selected from the group consisting of ruthenium claim 4 , palladium claim 4 , gold claim 4 , silver claim 4 , nickel claim 4 , tungsten claim 4 , molybdenum claim 4 , gallium claim 4 , iridium claim 4 , rhodium claim 4 , osmium claim 4 , copper claim 4 , cobalt claim 4 , iron claim 4 , and platinum claim 4 , or a mixture thereof.6. The system of claim 4 , wherein the metal nanoparticle comprises a lanthanide.7. The system of claim 4 , wherein the metal nanoparticle comprises a metal selected from the group consisting of platinum claim 4 , nickel claim 4 , and europium.8. The system of claim 5 , ...

Improved glycol acylation process with water-tolerant metal triflates

A method for acid-catalyzed acylation of an isohexide is described. The method can enable direct alcohol acylation with carboxylic acids. In particular, the method involves reacting an isohexide and an excess of carboxylic acid, in the presence of a water-tolerant Lewis acid catalyst. Water-tolerant Lewis acid catalysts can furnish relatively high diester yields (e.g., ≧55%-60%) at lower catalyst loads. This feature, among others, is highly desirable for cost savings, and can improve process economics.

Nano-sized functional binder

Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.

Catalysts for the mechanocatalytic oxidative depolymerization of polymer-containing materials and methods of making oxidized reaction products using same

The presently disclosed and/or claimed inventive concept(s) relates generally to oxidative oxidized reaction products made from the mechanocatalytic oxidative depolymerization of lignin. More particularly, but without limitation, the mechanocatalytic oxidative depolymerization of lignin is performed in a non-aqueous/non-solvent based and solvent-free process, i.e., via a solid-solid mechanocatalytic oxidative reaction methodology. In one particular embodiment, the process of making such oxidative oxidized reaction products includes, without limitation, the step of mechanocatalytically reacting an oxidation catalyst with lignin or a lignin-containing material. The oxidative reaction products obtained from the process include, for example, at least one of vanillin, and syringealdehyde, vanillic acid, and syringic acid.

Nano-sized functional binder

Described are catalytic articles comprising a substrate having a washcoat on the substrate, the washcoat containing a catalytic component having a first average (D50) particle size and a functional binder component having a second average (D50) particle size in the range of about 10 nm to about 1000 nm, wherein the ratio of the first average (D50) particle size to the second average (D50) particle size is greater than about 10:1. The catalytic articles are useful in methods and systems to purify exhaust gas streams from an engine.

GASOLINE PARTICULATE FILTER

A catalytic wall-flow monolith for use in an emission treatment system comprises a porous substrate and a three-way catalyst (TWC), wherein the TWC is distributed substantially throughout the porous substrate and wherein the TWC comprises: 2. The catalytic wall-flow monolith according to claim 1 , wherein the OSC comprises a ceria.3. The catalytic wall-flow monolith according to claim 2 , wherein the OSC comprises a mixed oxide of cerium and zirconium; a mixed oxide of cerium claim 2 , zirconium claim 2 , and neodymium; a mixed oxide of praseodymium and zirconium; a mixed oxide of cerium claim 2 , zirconium and praseodymium; or a mixed oxide of praseodymium claim 2 , cerium claim 2 , lanthanum claim 2 , yttrium claim 2 , zirconium and neodymium.4. The catalytic wall-flow monolith according to claim 3 , wherein the OSC comprises praseodymium and is present at 2-10 wt %.5. The catalytic wall-flow monolith according to claim 3 , wherein the OSC comprises praseodymium and wherein the first plurality of channels comprises an on wall TWC coating comprising the OSC comprising praseodymium.6. The catalytic wall-flow monolith according to claim 1 , wherein the ratio by weight of OSC to alumina is about 75:25.7. The catalytic wall-flow monolith according to claim 1 , wherein the one or more platinum group metals is selected from Pt claim 1 , Pd and Rh claim 1 , or combinations of two or more thereof.8. The catalytic wall-flow monolith according to claim 1 , wherein the TWC is homogenous throughout the porous substrate.9. The catalytic wall-flow monolith according to claim 1 , wherein the monolith has a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction claim 1 ,wherein the first plurality of channels is open at the first face and closed at the second face, and wherein the second plurality of channels is open at the second face and closed at the first face,and wherein ...

METHOD FOR CATALYTIC CONVERSION OF KETOACIDS AND HYDROTREAMENT TO HYDROCARBONS

Catalytic conversion of ketoacids is disclosed, including methods for increasing the molecular weight of ketoacids. An exemplary method includes providing in a reactor a feedstock having at least one ketoacid. The feedstock is then subjected to one or more C—C-coupling reaction(s) in the presence of a catalyst system having a first metal oxide and a second metal oxide. 1. A method for increasing the molecular weight of a ketoacid , the method comprising:providing in a reactor a feedstock having at least one ketoacid; andsubjecting the feedstock to one or more C—C-coupling reaction(s), wherein the C—C-coupling reaction(s) are conducted in a presence of a solid acid catalyst system having a first metal oxide and a second metal oxide, and wherein a content of the at least one ketoacid in the feedstock is at least 30 wt-%.2. The method according to claim 1 , wherein the catalyst system has a specific surface area of from 10 to 500 m/g.3. The method according to claim 1 , wherein a total amount of the acid sites of the catalyst system ranges between 30 and 500 μmol/g.4. The method according to claim 1 , wherein the at least one ketoacid is a γ-ketoacid acid.5. The method according to claim 1 , wherein the content of the at least one ketoacid in the feedstock is at least 40 wt-% claim 1 , and/or the content of water in the feedstock is less than 5.0 wt-%.6. The method according to claim 1 , wherein the first metal oxide comprises:an oxide of one of W, Be, B, Mg, Si, Ca, Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Bi, La, Ce, Th, and the second metal oxide comprises:an oxide of one of Zr, Ti, Si, Al, V, Cr or a combination of these, the first metal oxide not being same as the second metal oxide.7. The method according to claim 1 , wherein the first metal oxide is supported on a metal oxide carrier claim 1 , wherein the carrier is selected from the group consisting of zirconia claim 1 , titania claim 1 , silica claim 1 , vanadium oxide claim 1 ...

CATALYSTS FOR PETROCHEMICAL CATALYSIS

Metal oxide catalysts comprising various dopants are provided. The catalysts are useful as heterogeneous catalysts in a variety of catalytic reactions, for example, the oxidative coupling of methane to C2 hydrocarbons such as ethane and ethylene. Related methods for use and manufacture of the same are also disclosed. 185-. (canceled)86. A method for the oxidative coupling of methane , the method comprising contacting methane with a catalyst at temperatures ranging from about 550° C. to about 750° C. , wherein the method comprises a methane conversion of greater than 20% and a C2 selectivity of greater than 50% , and wherein the catalyst comprises the following formula:{'br': None, 'sub': x', 'y', 'z, 'ABO;'} A is an element from the lanthanides or group 2, 3, 4, 6 or 13;', 'B is an element from groups 4, 12 or 13 of the periodic table or Ce, Pr, Nd, Sm, Eu, Gd, Tb or Ho;', 'O is an oxygen anion; and', 'x, y and z are each independently numbers greater than 0,, 'whereinthe catalyst further comprising one or more dopants from any one of groups 2, 3 or the lanthanides, and provided that A and B are not the same.87. The method of claim 86 , wherein A is Ba claim 86 , Zr claim 86 , Sr claim 86 , Sm claim 86 , Hf claim 86 , Gd claim 86 , Er claim 86 , Y claim 86 , Ca claim 86 , La claim 86 , Mg claim 86 , W claim 86 , B claim 86 , Tb or Ce.88. The method of claim 86 , wherein B is Zn claim 86 , Hf claim 86 , Zr claim 86 , Al claim 86 , Ti claim 86 , Pr claim 86 , Nd claim 86 , Ce claim 86 , Sm claim 86 , Eu claim 86 , Gd claim 86 , Tb or Ho.89. The method of claim 86 , wherein A is from group 2 claim 86 , and B is from group 4.90. The method of claim 86 , wherein A is Ba claim 86 , Sr or Ca.91. The method of claim 86 , wherein B is Ti claim 86 , Zr or Hf.92. The method of claim 86 , wherein the catalyst has the formula ABO.93. The method of claim 86 , wherein the catalyst comprises one or more dopant from group 2.94. The method of claim 86 , wherein the catalyst comprises ...

METHOD OF MAKING PYROCHLORES

Disclosed is a method of making a pyrochlore comprising, obtaining a solution comprising a solvent and a metal precursor or salt thereof capable of forming a pyrochlore, wherein the metal precursor or salt thereof is dissolved in the solvent, subjecting the solution to a drying step to obtain a non-gelled or non-polymerized pyrochlore precursor material in powdered form, and subjecting the pyrochlore precursor material to a calcination step to obtain a pyrochlore.

EXHAUST GAS PURIFICATION CATALYST

The present disclosure provides an exhaust gas purification catalyst having improved performance for purifying an exhaust gas, in particular, an exhaust gas containing NOx. The exhaust gas purification catalyst of the present disclosure includes Rh-supporting composite oxide support particles containing Al, Zr, and Ti and Rh-supporting aluminum phosphate-based support particles. Furthermore, in the exhaust gas purification catalyst of the present disclosure, the ratio of the moles of metals constituting the aluminum phosphate-based support particles, relative to the total moles of metals constituting the composite oxide support particles and the aluminum phosphate-based support particles is 7.5% or more and 15.0% or less. 1. An exhaust gas purification catalyst comprising Rh-supporting composite oxide support particles containing Al , Zr , and Ti and Rh-supporting aluminum phosphate-based support particles ,wherein the aluminum phosphate-based support particles are support particles composed of aluminum phosphate or aluminum phosphate in which a part of Al is substituted by Zr, andwherein the percentage ratio of the moles of metals constituting the aluminum phosphate-based support particles relative to the total moles of metals constituting the composite oxide support particles and the aluminum phosphate-based support particles is 7.5% or more and 15.0% or less.2. The exhaust gas purification catalyst according to claim 1 , wherein the aluminum phosphate-based support particles are support particles composed of aluminum phosphate in which a part of Al is substituted by Zr.3. The exhaust gas purification catalyst according to claim 2 , wherein the support particles composed of aluminum phosphate in which a part of Al is substituted by Zr claim 2 , are represented by the formula: AlZrPO claim 2 , and a is 0.80 or more and less than 1.00.4. The exhaust gas purification catalyst according to claim 1 , further comprising Pt-supporting support particles.5. The exhaust gas ...

Coating for reducing nitrogen oxides

A catalyst coating for use in a hydrolysis catalyst (H-catalyst) for the reduction of nitrogen oxides, a manufacturing method for such a coating, a catalyst structure and its use are described. The H-catalyst includes alkaline compounds, which are capable of adsorbing HNCO and/or nitrogen oxides and which include alkali and alkaline earth metals, lanthanum and/or yttrium and/or hafnium and/or prasedium and/or gallium, and/or zirconium for promoting reduction, such as for promoting the hydrolysis of urea and the formation of ammonia and/or the selective reduction of nitrogen oxides.

Metal Oxide Composite and a Method of Forming Thereof

A method of forming a metal oxide composite, the method comprising mixing a metal oxide, at least two monomers and a dispersant to produce a slurry; gel casting the slurry to produce a green metal oxide composite; and sintering the green metal oxide composite to produce the metal oxide composite. A metal oxide composite formed according to the method. Use of the metal oxide composite, for catalysing hydrolysis of metal borohydride to produce hydrogen. 1. A method of forming a metal oxide composite , the method comprising:mixing a metal oxide, at least two monomers and a dispersant to produce a slurry;gel casting the slurry to produce a green metal oxide composite; andsintering the green metal oxide composite to produce the metal oxide composite.2. The method according to claim 1 , further comprising degassing the slurry prior to gel casting the slurry.3. The method according to claim 1 , wherein the metal oxide comprises at least one of: a cobalt-based metal oxide claim 1 , a yttria stabilized zirconia-based metal oxide claim 1 , a nickel-based metal oxide claim 1 , and a perovskite-based metal oxide.4. The method according to claim 1 , wherein the at least two monomers comprises an acrylamide (AM) and an N claim 1 ,N′-methylenebisacrylamide (MBAM).5. The method according to claim 1 , further comprising adding at least one of a catalyst and an initiator to the slurry prior to the gel casting.6. The method according to claim 5 , wherein the initiator is an ammonium bisulphate (APS) solution.7. The method according to claim 5 , wherein the catalyst is N claim 5 ,N claim 5 ,N′ claim 5 ,N′-tetramethylethylenediamide (TEMED).8. (canceled)9. The method according to claim 1 , wherein the mixing further comprises adding a pore former in the mixing claim 1 , the pore former configured to form pores in the metal oxide composite.10. The method according to claim 9 , wherein the pore former comprises graphite powder.11. The method according to claim 1 , wherein the mixing ...

CATALYSTS, METHODS, AND SYSTEMS FOR PREPARING CARBAMATES

Methods, systems and kits for preparing carbamates as well as catalysts for preparing the carbamates, are disclosed. The methods for preparing carbamate can include providing a catalyst comprising cerium oxide (CeO2) and at least one metal selected from the group consisting of iron (Fe), manganese (Mn), titanium (Ti), cobalt (Co), aluminum (Al), zinc (Zn), calcium (Ca), tin (Sn), indium (In), and any combination thereof; contacting the catalyst with at least one amine and at least one alcohol to form a mixture; and contacting the mixture with carbon dioxide under conditions sufficient to form the carbamate. 1. A catalyst comprising cerium oxide (CeO) and aluminum (Al); wherein the catalyst is a calcined catalyst.2. The catalyst of claim 1 , wherein the catalyst is a heterogeneous catalyst.34-. (canceled)5. The catalyst of claim 1 , wherein the catalyst comprises a formula CeAlO claim 1 , wherein x and y add up to about 1 claim 1 , and x and y are each a positive number.6. The catalyst of claim 5 , wherein x is about 0.8 to about 1 claim 5 , and y is about 0 to about 0.2.7. The catalyst of claim 5 , wherein x is 0.966 and y is 0.033.829-. (canceled)30. A method of preparing a carbamate claim 5 , the method comprising:contacting a catalyst with at least one amine and at least one alcohol to form a mixture; andcontacting the mixture with carbon dioxide under conditions sufficient to form the carbamate;{'sub': '2', 'wherein the catalyst comprises cerium oxide CeOand aluminum Al and is a calcined catalyst.'}3134-. (canceled)35. The method of claim 30 , wherein the at least one alcohol comprises methanol claim 30 , ethanol claim 30 , propanol claim 30 , butanol claim 30 , n-hexanol claim 30 , or a combination of any two or more thereof.36. The method of claim 30 , wherein the at least one amine comprises at least one aliphatic amine.37. The method of claim 36 , wherein the at least one aliphatic amine comprises methylamine claim 36 , ethylamine claim 36 , n-propylamine ...

Doped carbonaceous materials for photocatalytic removal of pollutants under visible light, making methods and applications of same

A method of synthesizing a doped carbonaceous material includes mixing a carbon precursor material with at least one dopant to form a homogeneous/heterogeneous mixture; and subjecting the mixture to pyrolysis in an inert atmosphere to obtain the doped carbonaceous material. A method of purifying water includes providing an amount of the doped carbonaceous material in the water as a photocatalyst; and illuminating the water containing the doped carbonaceous material with visible light such that under visible light illumination, the doped carbonaceous material generates excitons (electron-hole pairs) and has high electron affinity, which react with oxygen and water adsorbed on its surface forming reactive oxygen species (ROS), such as hydroxyl radicals and superoxide radicals, singlet oxygen, hydrogen peroxide, that, in turn, decompose pollutants and micropollutants.

CATALYST CARRIER MODULE FOR LARGE-CAPACITY CATALYTIC REACTOR

Provided is a catalyst carrier module for a large-capacity catalyst reactor, which can be assembled in a large-capacity structure by laminating a flat plate and a wave plate to be fixed in a can without brazing the flat plate and the wave plate constituting a cell forming body, for use in a catalytic reactor requiring a large-capacity exhaust gas treatment. The catalyst carrier module (or block) includes: a can of a rectangular tube shape having an inlet and an outlet; at least one cell forming body in which a plurality of hollow cells are formed by alternately laminating a wave plate and a flat plate which are coated with a catalyst on a surface thereof and inserted into the can; and a fixing unit installed at the inlet and the outlet of the can to prevent the at least one cell forming body from detaching from the can. 1. A catalyst carrier module comprising:a can of a rectangular tube shape having an inlet and an outlet;at least one cell forming body in which a plurality of hollow cells are formed by alternately laminating a wave plate and a flat plate which are coated with a catalyst on a surface thereof and inserted into the can; anda fixing unit installed at the inlet and the outlet of the can to prevent the at least one cell forming body from detaching from the can.2. The catalyst carrier module of claim 1 , wherein the fixing unit comprises a plurality of fixing bars installed at the inlet and the outlet of the can to prevent the at least one cell forming body from being detached from the can.3. The catalyst carrier module of claim 2 , wherein each of the plurality of fixing bars is fixed to both sides of the can using a fastening member.4. The catalyst carrier module of claim 2 , wherein each of the plurality of fixing bars is bonded to the can by one of brazing claim 2 , welding claim 2 , soldering claim 2 , and diffusion bonding.5. The catalyst carrier module of claim 1 , wherein the fixing unit comprises first to fourth fixing members both sides of which ...

GLASS CATALYST COMPOSITIONS FOR IMPROVED HYDROTHERMAL DURABILITY

A diesel soot filter includes a substrate having a surface disposed at least partially within a fluid path of the diesel soot filter. A glass catalyst is disposed on the surface of the substrate such that an exhaust gas contacts at least a portion of a surface of the glass catalyst as the exhaust gas moves within the diesel soot filter. The glass catalyst comprises a plurality of alkali metal ions disposed within the glass catalyst and releasable to the surface of the glass catalyst at a controlled rate and the alkali metal ions combust with the soot as the exhaust gas travels along the fluid path. An oxide basis of the glass catalyst comprises Silicon (Si), Potassium (K), Cesium (Ce), and Zirconium (Zr) 1. A diesel soot filter comprising:a substrate having a surface disposed at least partially within a fluid path of the diesel soot filter; and 'a plurality of alkali metal ions disposed within the glass catalyst and releasable to the surface of the glass catalyst at a controlled rate sufficiently fast to supplement the lost alkali metal ions at the surface of the glass catalyst and sufficiently slow to extend the catalytic lifespan of the filter, wherein the alkali metal ions combust with the soot as the exhaust gas travels along the fluid path, and wherein an oxide basis of the glass catalyst comprises Silicon (Si), Potassium (K), Cesium (Ce), and Zirconium (Zr).', 'a glass catalyst disposed on the surface of the substrate such that an exhaust gas contacts at least a portion of a surface of the glass catalyst as the exhaust gas moves within the diesel soot filter, the glass catalyst comprising2. A diesel soot filter as defined in claim 1 , wherein the weight percentage of the oxide basis of the glass catalyst is about 45 At % Si claim 1 , 45 At % K claim 1 , 8 At % Ce claim 1 , and 2 At % Zr.3. A diesel soot filter as defined in claim 1 , wherein the weight percentage of the oxide basis of the glass catalyst comprises approximately 0 At % Ce to approximately 10 At ...

METHOD FOR ENHANCING DEGRADATION OF ESTER VOCS WITH CERIUM OXIDE SUPPORTED PALLADIUM SINGLE ATOM CATALYST UNDER LOW-TEMPERATURE MICROWAVE

A method for enhancing degradation of ester volatile organic compounds with a cerium oxide supported palladium single atom catalyst under low-temperature microwave comprises the steps of firstly preparing a single atom catalyst Pd/CeO, adding the catalyst Pd/CeOinto a reaction cavity, initiating microwave radiation to enhance the catalysis reaction, and quickly introducing an ester compound with a concentration of 50˜5000 mg/mand a space velocity of 2000˜100000 hinto the reaction cavity from a vapor phase sampling port to react when the reaction temperature is 10˜80° C. A catalyst packed column is provided in the reaction cavity, the vapor phase sampling port is defined at the bottom of the reaction cavity, and an exhaust port is defined at the top of the cavity. The microwave method can enhance and activate active sites, prevent the aging of active sites, and enable the chemical reaction rate to be increased by more than 17.9%. 1. A method for enhancing degradation of ester volatile organic compounds (VOCs) with a cerium oxide loaded palladium single atom catalyst under low-temperature microwave , comprising the following steps:(a) preparation of a catalyst:(1) dissolving a cerium-containing compound into deionized water to form a solution; adding NaOH in the solution, until pH=8˜10, stirring, and then reacting in a water bath pot to obtain cerium oxide-containing solution;(2) adding a palladium-containing compound and sodium borohydride together into the cerium oxide-containing solution to react;(3) after the reaction is ended, centrifuging the solution on a centrifuge, and then removing the solution in a centrifuge tube to obtain a precipitation product; and{'sub': 2', '2', '2, '(4) washing the precipitation product with deionized water, drying overnight, and calcining in a muffle furnace at Natmosphere containing 3-7% of Hto obtain a single atom catalyst Pd/CeO;'}(b) microwave-assisted enhancement of degradation:{'sub': '2', 'sup': 3', '−1, 'adding the catalyst ...

CATALYSTS FOR NATURAL GAS PROCESSES

Catalysts, catalytic forms and formulations, and catalytic methods are provided. The catalysts and catalytic forms and formulations are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane. Related methods for use and manufacture of the same are also disclosed. 138-. (canceled)39. A catalytic material comprising:(a) an OCM active catalyst; and {'br': None, 'sub': a', 'b', 'x', 'y, 'Ln1Ln2O(OH)'}, '(b) a second catalyst comprising the following formulawherein:Ln1 and Ln2 are each independently different lanthanide elements;O is oxygen;OH is hydroxy;a is a number greater than 0; andb, x and y are each independently numbers of 0 or greater, provided that at least one of x or y is greater than 0, andwherein the catalytic material comprises a methane conversion of greater than 20% and a C2 selectivity of greater than 50% when the catalytic material is employed as a heterogeneous catalyst in the oxidative coupling of methane at a temperatures ranging from about 550° C. to about 750° C.40. The catalytic material of claim 39 , wherein b and x are each independently numbers greater than 0 claim 39 , and y is 0.41. The catalytic material of claim 39 , wherein the OCM active catalyst is a bulk catalyst and the second catalyst is a nanostructured catalyst.42. The catalytic material of claim 39 , wherein the OCM active catalyst is a nanostructured catalyst.43. The catalytic material of claim 42 , wherein the OCM active catalyst is a nanowire catalyst.44. The catalytic material of claim 39 , wherein the second catalyst comprises a nanostructured catalyst comprising a lanthanum/neodymium oxide claim 39 , a lanthanum/cerium oxide claim 39 , a neodymium/cerium oxide claim 39 , a lanthanum/samarium oxide claim 39 , a neodymium/samarium oxide claim 39 , a europium/neodymium oxide claim 39 , a lanthanum/erbium oxide claim 39 , a neodymium/erbium oxide claim 39 , or a europium/lanthanum oxide.45. The catalytic material of claim 39 , wherein the ...

FUNCTIONAL NANOSCALE METAL OXIDES FOR STABLE METAL SINGLE ATOM AND CLUSTER CATALYSTS

A nanocomposite catalyst includes a support, a multiplicity of nanoscale metal oxide clusters coupled to the support, and one or more metal atoms coupled to each of the nanoscale metal oxide clusters. Fabricating a nanocomposite catalyst includes forming nanoscale metal oxide clusters including a first metal on a support, and depositing one or more metal atoms including a second metal on the nanoscale metal oxide clusters. The nanocomposite catalyst is suitable for catalyzing reactions such as CO oxidation, water-gas-shift, reforming of COand methanol, and oxidation of natural gas. 1. A nanocomposite catalyst comprising:a support;a multiplicity of nanoscale metal oxide clusters coupled to the support; andone or more metal atoms coupled to each of the nanoscale metal oxide clusters.2. The catalyst of claim 1 , wherein the support comprises a refractory material having a surface area of at least 50 m/g or at least 100 m/g.3. The catalyst of claim 2 , wherein the support comprises silica claim 2 , alumina claim 2 , magnesia claim 2 , zirconia claim 2 , cordierite claim 2 , mullite claim 2 , perovskite or any combination thereof.4. The catalyst of claim 2 , wherein the support is powdered.5. The catalyst of claim 1 , wherein the nanoscale metal oxide clusters comprise CeO claim 1 , CoO claim 1 , FeOTiO claim 1 , CuO claim 1 , NiO claim 1 , MO claim 1 , NbO claim 1 , ZrOor any combination thereof.6. The catalyst of claim 5 , wherein the nanoscale metal oxide clusters comprise CeO claim 5 , COO claim 5 , FeO claim 5 , TiO claim 5 , CuO claim 5 , NiO claim 5 , MnO claim 5 , NbO claim 5 , ZrOor any combination thereof.7. The catalyst of claim 1 , wherein the one or more metal atoms independently comprise one or more transition metal atoms.8. The catalyst of claim 7 , wherein the one or more metal atoms independently comprise one or more precious metal atoms.9. The catalyst of claim 8 , wherein the one or more metal atoms comprise Pt claim 8 , Pd claim 8 , Rh claim 8 , Au ...

EXHAUST TREATMENT SYSTEM INCLUDING NICKEL-CONTAINING CATALYST

Methods and systems are provided for emissions control of a vehicle. In one example, a catalyst may include a cerium-based support material and a transition metal catalyst loaded on the support material, the transition metal catalyst including nickel and copper, wherein nickel in the transition metal catalyst is included in a monatomic layer loaded on the support material. In some examples, limiting nickel to the monatomic layer may mitigate extensive transition metal catalyst degradation ascribed to sintering of thicker nickel washcoat layers. Further, by utilizing the cerium-based support material, side reactions involving nickel in the transition metal catalyst with other support materials may be prevented. 1. A catalyst , comprising:a support material comprising one or more of cerium metal, ceria, and high-cerium cerium-zirconium oxide; anda transition metal catalyst loaded on the support material, the transition metal catalyst comprising nickel and copper;wherein nickel in the transition metal catalyst is included in a monatomic layer loaded on the support material.2. The catalyst of claim 1 , wherein a loading of nickel in the transition metal catalyst on the support material is greater than 0.001 g/mand less than 0.002 g/m.3. The catalyst of claim 1 , wherein nickel is present at about 12 wt. %.4. The catalyst of claim 1 , wherein a weight ratio of copper to nickel is about 1:49.5. The catalyst of claim 1 , wherein the high-cerium cerium-zirconium oxide is CeZrO.6. The catalyst of claim 1 , wherein alumina is present at a molar ratio of alumina to nickel of less than 0.20.7. The catalyst of claim 1 , wherein no alumina is present.8. A system for a vehicle claim 1 , comprising:a first emissions treatment device comprising a cerium-based support material and a transition metal catalyst washcoat, the transition metal catalyst washcoat comprising nickel and copper, with nickel in the transition metal catalyst washcoat included in only a monatomic layer loaded on ...

CATALYSTS AND METHODS FOR NATURAL GAS PROCESSES

Catalysts and catalytic methods are provided. The catalysts and methods are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane. 1. A catalyst comprising the following formula (IA):{'br': None, 'sub': x', 'y', 'v', 'w', 'z, 'ABCDO\u2003\u2003 (IA)'}wherein:A is a lanthanide or group 4 element;B is a group 2 element;C is a group 13 element;D is a lanthanide element;O is oxygen;v and w are independently numbers greater than 0;{'sub': x', 'y', 'v', 'w', 'z, 'x, y and z are independently numbers greater than 0, and v, w, x, y and z are selected such that ABCDOhas an overall charge of 0.'}2. The catalyst of claim 1 , wherein A is a lanthanide.3. The catalyst of claim 2 , wherein A is lanthanum claim 2 , cerium claim 2 , praseodymium or neodymium.4. The catalyst of claim 1 , wherein A is a Group 4 element.5. The catalyst of claim 4 , wherein A is titanium claim 4 , zirconium or hafnium.6. The catalyst of claim 1 , wherein B is magnesium claim 1 , calcium claim 1 , strontium or barium.7. The catalyst of claim 1 , wherein A is lanthanum and B is strontium claim 1 , A is cerium and B is barium claim 1 , A is praseodymium and B is barium claim 1 , A is cerium and B is strontium claim 1 , A is titanium and B is barium claim 1 , A is titanium and B is strontium or A is titanium and B is calcium.8. The catalyst of claim 1 , wherein C is aluminum claim 1 , gallium claim 1 , indium or thallium.9. The catalyst of claim 1 , wherein D is lanthanum claim 1 , neodymium claim 1 , gadolinium or ytterbium.10. The catalyst of claim 1 , wherein:A is titanium, zirconium or cerium;B is calcium, strontium or barium;C is aluminum, gallium or indium; andD is lanthanum, neodymium; gadolinium or ytterbium.11. The catalyst of claim 1 , comprising one of the following formulas: CeBaInNdO; TiCaInLaO; TiCaInNdO; TiCaInGdO; TiCaInYbO; ZrCaInLaO; ZrCaInNdO; ZrCaInGdO; ZrCaInYbO; CeCaInLaO; ZrCaInNdO; ZrCaInGdO; ZrCaInYbO; TiSrInLaO; TiSrInNdO; TiSrInGdO; TiSrInYbO; ...

MIXED OXIDE CATALYST FOR THE OXIDATIVE COUPLING OF METHANE

A mixed oxide catalyst for the oxidative coupling of methane can include a catalyst with the formula ABCDO, wherein: element A is selected from alkaline earth metals; elements B and C are selected from rare earth metals, and wherein elements B and C are different rare earth metals; the oxide of at least one of A, B, C, and D has basic properties; the oxide of at least one of A, B, C, and D has redox properties; and elements A, B, C, and D are selected to create a synergistic effect whereby the catalytic material provides a methane conversion of greater than or equal to 15% and a C selectivity of greater than or equal to 70%. Systems and methods can include contacting the catalyst with methane and oxygen and purifying or collecting C products. 1. A catalytic material for oxidative coupling of methane comprising:{'sub': a', 'b', 'c', 'd', 'x, 'claim-text': element A is selected from alkaline earth metals;', 'elements B and C are selected from rare earth metals, and wherein elements B and C are different rare earth metals;', 'the oxide of at least one of A, B, C, and D has basic properties;', 'the oxide of at least one of A, B, C, and D has redox properties; and', {'sub': '2', 'sup': '−', 'elements A, B, C, and D are selected to create a synergistic effect whereby the catalytic material provides a methane conversion of greater than or equal to 15% and a C selectivity of greater than or equal to 70%.'}], 'a catalyst with the formula ABCDO, wherein2. The catalytic material according to claim 1 , wherein: =1.0; claim 1 , claim 1 , and are each in the range from about 0.01 to about 10; and is a number selected to balance the oxidation state of D.3. The catalytic material according to claim 1 , wherein element A is selected from the group consisting of magnesium claim 1 , calcium claim 1 , strontium claim 1 , and barium.4. The catalytic material according to claim 1 , wherein elements B and C are selected from the group consisting of cerium claim 1 , ytterbium claim 1 , ...

METHOD OF MAGNETIC ANALYSIS TO DETERMINE THE CATALYTIC ACTIVITY OF METAL OXIDES INCLUDING NANOCERIA

A method to predict the catalytic activity of a metal oxide of formula MOwhere x is a number from 1 to 3 and y is a number from 1 to 8 is provided. The metal of the metal oxide has redox coupled oxidation states wherein the redox transformation is between oxidation states selected from the group consisting of a diamagnetic oxidation state (M) and a paramagnetic oxidation state (M), a paramagnetic oxidation state (M) and a ferromagnetic oxidation state (M), and a paramagnetic oxidation state (M) and an antiferromagnetic oxidation state (Mwhere d, p, f and a are independently numbers from 1 to 6 and one of the oxidation states (M), (M), (M), and (M) is formed by reduction by the O. The magnetic susceptibility of the metal oxide as a sample in an oxygen environment at a specified temperature is correlated with a value of (M or M or M or M)/g (Orich). Then the magnetic susceptibility of the metal oxide as a sample in an oxygen free environment at the specified temperature is measured and correlated with a value of number of (M or M or M or M)/g (Odeficient). The catalytic activity is predicted based on the difference of these two numbers. 1. A method to predict the catalytic activity of a metal oxide of formula MOwhere x is a number from 1 to 3 and y is a number from 1 to 8 , the method comprising:measuring the magnetic susceptibility of a metal oxide sample in an oxygen environment at a specified temperature;{'sup': d+', 'p+', 'f+', 'a+, 'sub': '2', 'correlating the magnetic susceptibility measured to a value of number of (M or M or M or M)/g (Orich)'}measuring the magnetic susceptibility of the metal oxide sample in an oxygen free environment at the specified temperature;{'sup': d+', 'p+', 'f+', 'a+, 'sub': '2', 'correlating the magnetic susceptibility measured to a value of number of (M or M or M or M)/g (Odeficient)'}{'sup': d+', 'p+', 'f+', 'a+, 'claim-text': {'br': None, 'sup': d+', 'p+', 'f+', 'a+', 'd+', 'p+', 'f+', 'a+', 'd+', 'p+', 'f+', 'a+', 'd+', 'p+', 'f ...

MATERIAL AND EXHAUST GAS SYSTEM AND METHOD FOR USING THE SAME

A material is described of formula NaMAlSiOwith Face Centered Cubic (fcc) lattices forming F -4 3 m cubic structure, wherein M is at least one of lithium, potassium, rubidium, caesium, vanadium, chromium, iron, cobalt, nickel, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold, and cerium; 00; 1≦a3; 1≦b≦3; and 0<δ≦32/3. An exhaust gas system comprising the material and a method are also described herein. 1. A material of formula I , having face centered cubic (FCC) lattices forming F -4 3 m cubic structure ,{'br': None, 'sub': x', 'y', 'a', 'b', '67, 'NaMAlSiO'}whereinM is at least one of lithium, potassium, rubidium, caesium, vanadium, chromium, iron, cobalt, nickel, ruthenium, rhodium, palladium, silver, osmium, iridium, platinum, gold, and cerium; {'br': None, '1≦a≦3; 1≦b≦3; and 0<δ≦32/3.'}, '00;'}2. The material of claim 1 , wherein y>0 and M is at least one of potassium claim 1 , lithium claim 1 , cerium claim 1 , and cobalt.3. The material of claim 1 , wherein M is potassium and 3.2≦x≦3.8 and 0.2≦y≦0.8.4. The material of claim 1 , wherein M is lithium and x=3.8 and y=0.2.5. The material of claim 1 , wherein M is cobalt and x=3.8 and y=0.2.6. The material of claim 1 , wherein M is cerium and 3.8≦x≦3.9996 and 0.0004≦y≦0.2.7. The material of claim 1 , being of formula: NaKAlSiO claim 1 , NaKAlSiO claim 1 , NaKAlSiO claim 1 , NaLiAlSiO claim 1 , NaCeAlSiO claim 1 , NaCeAlSiO claim 1 , NaCeAlSiO claim 1 , NaAlSiO claim 1 , NaKAlSiOor NaCoAlSiO.8. An exhaust gas system comprising the material of .9. The exhaust gas system of claim 1 , comprising a diesel particulate filter receiving diesel exhaust gas from a diesel engine and coated with the material of .10. The exhaust gas system of claim 8 , wherein y>0 and M is at least one of potassium claim 8 , lithium claim 8 , ...

CERIUM-ZIRCONIUM COMPOSITE OXIDE, PREPARATION METHOD THEREFOR, AND APPLICATION OF CATALYST

Provided are a cerium-zirconium composite oxide, a preparation method therefor and application of a catalyst. The cerium-zirconium composite oxide has a composite phase structure, and comprises a cerium oxide phase and a cerium-zirconium solid solution phase, or consists of two or more cerium-zirconium solid solution phases with different crystal structures and different chemical compositions, wherein the chemical formula of the cerium-zirconium solid solution phase is CeZrMO, where M is at least one selected from the group consisting of a rare earth element other than cerium, a transition metal element and an alkaline earth metal element, x is 15-85 mol %, and y is 0-20 mol %. 1. A cerium-zirconium composite oxide , wherein the cerium-zirconium composite oxide has a composite phase structure , and comprises a cerium oxide phase and a cerium-zirconium solid solution phase , wherein the chemical formula of the cerium-zirconium solid solution phase is CeZrMO , where M is at least one selected from the group consisting of a rare earth element other than cerium , a transition metal element and an alkaline earth metal element , x is 15˜85 mol % , and y is 0˜20 mol %.2. The cerium-zirconium composite oxide as claimed in claim 1 , wherein after the cerium-zirconium composite oxide is subjected to heat preservation at 1000° C. for 4 hours claim 1 , the cerium oxide phase has a proportion of 0.5˜30 vol % in the cerium-zirconium composite oxide claim 1 , preferably 3˜20 vol %.3. The cerium-zirconium composite oxide as claimed in claim 1 , wherein the cerium-zirconium composite oxide comprises cerium oxide needle-like particles and cerium-zirconium solid solution near-spherical particles claim 1 , and after being subjected to heat preservation at 1000° C. for 4 hours claim 1 , the cerium oxide needle-like particles have a diameter of 7˜20 nm and a length of 50˜300 nm claim 1 , the cerium-zirconium solid solution near-spherical particles have a diameter of 5˜30 nm claim 1 , and ...

Production of Xylenes From Syngas

This disclosure relates to the production of xylenes from syngas, in which the syngas is converted to an aromatic product by reaction with an isosynthesis catalyst and an aromatization catalyst. The isosynthesis catalyst and aromatization catalyst may be different catalysts or combined into a single catalyst. The aromatic product is then subjected to one of more of (i) xylene isomerization, (ii) transalkylation with at least one C+aromatic hydrocarbon, and (iii) alkylation with methanol and/or carbon monoxide and hydrogen to increase its p-xylene content. 1. A process for producing xylenes , the process comprising:(a) providing a feed comprising hydrogen and carbon monoxide, in which the molar ratio of hydrogen to carbon monoxide is from 0.5 to 6;(b) contacting the feed with (i) a first catalyst comprising at least one metal or compound containing a metal selected from the group consisting of Ce, Zn, Zr, and Th, and (ii) a second catalyst, which may be the same as or different than the first catalyst, comprising at least one medium pore size molecular sieve under conditions including a temperature of at least 350° C. and a pressure of at least 1500 kPa (absolute) effective to produce a reaction effluent containing benzene, toluene, and xylenes; and{'sub': '9', '(c) subjecting at least part of the reaction effluent to at least one of (i) contacting with a xylene isomerization catalyst, (ii) transalkylation with at least one C+ aromatic hydrocarbon, and (iii) alkylation with methanol and/or carbon monoxide and hydrogen under conditions to produce p-xylene.'}2. The process of claim 1 , wherein the feed further comprises methane.3. The process of claim 1 , wherein the first catalyst comprises CeZrO.4. The process of claim 1 , wherein the second catalyst comprises at least one molecular sieve having a Constraint Index of 1-12.5. The process of claim 1 , wherein the at least one molecular sieve of the second catalyst comprises ZSM-5.6. The process of claim 1 , wherein the ...

Exhaust Gas Purifying Catalyst

This exhaust gas purifying catalyst is provided with a substrate and a catalyst layer formed on a surface of the substrate. The catalyst layer contains zeolite particles that support a metal, and a rare earth element-containing compound that contains a rare earth element. The rare earth element-containing compound is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite is 0.001 to 0.014 in terms of oxides. 1. An exhaust gas purifying apparatus which is disposed in an exhaust pathway of an internal combustion engine and cleans exhaust gas emitted from the internal combustion engine , the apparatus comprising:an exhaust gas purifying catalyst comprising a substrate and a catalyst layer formed on a surface of the substrate, anda reducing agent supply mechanism which supplies a reducing agent for generation of ammonia to the exhaust gas at a position upstream in the exhaust pathway as compared to a position of the exhaust gas purifying catalyst, whereinthe catalyst layer contains zeolite particles that support a metal and that support a rare earth element-containing compound that contains lanthanum (La) as a rare earth element, andan amount of the rare earth element-containing compound contained is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides, whereinthe rare earth element-containing compound is disposed on a surface of the zeolite particles.2. The exhaust gas purifying apparatus according to claim 1 , wherein a relationship between an average particle diameter D1 of the zeolite particles and an average particle diameter D2 of the rare earth element-containing compound satisfies the following formula: 0.005<(D2/D1)<0.5.3. The exhaust gas purifying apparatus according to claim 1 , wherein an average particle diameter D2 of the rare earth element-containing compound is 100 nm or less.4. The exhaust gas purifying ...

Exhaust Gas Purifying Catalyst

This exhaust gas purifying catalyst is provided with a substrate and a catalyst layer formed on a surface of the substrate. The catalyst layer contains zeolite particles that support a metal, and a rare earth element-containing compound that contains a rare earth element. The rare earth element-containing compound is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite is 0.001 to 0.014 in terms of oxides. 1. A catalyst body which is used in an exhaust gas purifying catalyst , the catalyst body comprising:zeolite particles;a metal supported on the zeolite particles; anda rare earth element-containing compound disposed on a surface of the zeolite particles, whereinthe rare earth element-containing compound contains lanthanum (La) as a rare earth element, andan amount of the rare earth element-containing compound is such an amount that a molar ratio of the rare earth element relative to Si contained in the zeolite particles is 0.001 to 0.014 in terms of oxides.21221. The catalyst body according to claim 1 , wherein a relationship between an average particle diameter D of the zeolite particles and an average particle diameter D of the rare earth element-containing compound satisfies the following formula: 0.005<(D/D)<0.5.32. The catalyst body according to claim 1 , wherein an average particle diameter D of the rare earth element-containing compound is 100 nm or less.4. The catalyst body according to claim 1 , wherein when an amount of the rare earth element at a cross section of a zeolite particle is measured using an Electron Probe Micro Analyzer (EPMA) claim 1 , the amount of the rare earth element present at the surface of the zeolite particle is greater than the amount of the rare earth element present in the inner part of the zeolite particle.5. The catalyst body according to claim 1 , wherein the rare earth element-containing compound contains at least one of lanthanum oxide and lanthanum hydroxide.6. The ...

THREE-DIMENSIONALLY ORDERED MACROPOROUS OXYGEN-DEFICIENT CERIUM DIOXIDE CATALYST, AND PREPARATION METHOD AND APPLICATION THEREOF

The present application is related to a three-dimensionally ordered macroporous oxygen-deficient cerium dioxide catalyst, and a preparation method and an application thereof. The catalyst is prepared by using a polymethyl methacrylate (PMMA) colloidal crystal template method, calcining in a reducing/oxidizing atmosphere, and treating with water vapor, and the prepared catalyst shows an excellent activity and stability in photothermocatalytic purification of typical amospheric pollutants such as styrene, n-hexane, and cyclohexane. The method has the characteristics of cheap and easily available raw materials, simple preparation process, controllable oxygen vacancy, surface acid amount, and acid strength of the obtained material, and excellent photothermocatalytic performance. 1. A preparation method of a three-dimensionally ordered macroporous oxygen-deficient cerium dioxide catalyst , comprising following steps of:S1: adding cerium nitrate hexahydrate and citric acid monohydrate powder into an alcohol solution to obtain an even transparent solution A after ultrasonic treatment;S2: immersing polymethyl methacrylate microsphere powder in the solution A, carrying out ultrasonic homogenization, then removing excess liquid by suction filtration to obtain a solid B, and sequentially carrying out vacuum drying, calcination I, and calcination II on the solid B to obtain a solid C; andS3: transferring the solid C obtained in the step S2 into a fixed bed reactor, and then carrying out calcination III, water vapor treatment, and calcination IV to obtain the three-dimensionally ordered macroporous oxygen-deficient cerium dioxide catalyst;wherein the calcination III and the water vapor treatment in the step S3 are carried out at the same time, and comprise processes of: controlling a humidity in the reactor to be 10% to 90% by using a nitrogen bubbling device, and calcinating at 200° C. to 600° C. for 1 hour to 24 hours in a mixed gas atmosphere of hydrogen and nitrogen with a ...

MULTIMETALLIC CATALYSTS FOR METHANATION OF CARBON DIOXIDE AND DRY REFORMING OF METHANE

Processes for forming multimetallic catalysts by grafting nickel precusors to metal oxide supports. Dry reforming reaction catalysts having nickel and promotors grafted to metal oxides supports. Methanation reaction catalysts having nickel and promotors grafted to metal oxides supports. 1. A method of forming a multimetallic catalyst comprising:{'sub': 2', '3', '2', '2', '2, 'grafting an organometallic promotor comprising a metal selected from the group consisting of B, Cu, Co, Fe, Mn, Sn, Mg, V, and Zn and an organic ligand, onto a metal oxide support selected from the group consisting of AlO, CeO, MgO, SiO, and TiO, forming a promotor-support material;'}calcine the organometallic promotor in air to form a calcined promotor-support material;grafting an organonickel precursor grafted onto the calcined promotor-support material; andreducing the organonickel grafted promotor-support material to form an active multimetallic catalyst.2. The method of claim 1 , wherein reducing comprises reduction with 5-20% hydrogen at 200-600° C. for 2 hours and the active multimetallic catalyst is a methanation reaction catalyst.3. The method of claim 2 , wherein reducing comprises reduction with 10% hydrogen at 500° C. for 2 hours.4. The method of claim 2 , wherein the metal oxide support comprises CeO.5. The method of claim 4 , wherein the metal is selected from the group consisting of B claim 4 , Co claim 4 , Mn claim 4 , Sn claim 4 , and V.6. The method of claim 1 , wherein the wherein the oxide support comprises AlO.7. The method of claim 4 , wherein the metal is selected from the group consisting of Mg and V.8. The method of claim 1 , wherein reducing comprises reduction with 5-20% hydrogen at 700-850° C. for 2 hours and the active multimetallic catalyst is a dry reforming reaction catalyst.9. The method of claim 1 , wherein reducing comprises reduction with 10% hydrogen at 800° C. for 2 hrs.10. The method of claim 8 , wherein the wherein oxide support is selected from the group ...

Functional Platform for Rapid Capture and Removal of Nanoparticles

Device, method, and system for nanoparticle capture, tracking, and/or detection. A functional paper-based platform is modified with capture ligands to create binding sites for nanoparticles. According to an embodiment, nanoparticle binding produces visual images of the particle content and distribution on the modified sensing surface, which provides capabilities for both NP sequestration and real-time detection. According to an embodiment the system may be utilized for environmental decontamination, fabrication of personal protective equipment, field monitoring, and epidemiological studies. The availability of inexpensive and easy-to-use quantitative methods can facilitate rapid assessment and measurement of NPs concentration and the level of exposure for large scale toxicological and epidemiological testing 1. A sensor for detecting a presence of nanoparticles , the sensor comprising:a platform; anda plurality of ligand molecules attached to the platform, wherein the ligand is selected such that binding of a nanoparticle to a ligand molecule oxidizes the ligand and produces a color change;wherein the color change indicates a presence of nanoparticles.2. The sensor of claim 1 , wherein the platform is a paper-based platform.3. The sensor of claim 2 , wherein the paper-based platform is cellulose.4. The sensor of claim 1 , wherein the platform comprises one or more of silk claim 1 , cotton claim 1 , wool claim 1 , linen claim 1 , nylon claim 1 , rayon claim 1 , and polyester.5. The sensor of claim 1 , wherein the plurality of ligand molecules comprises a catechol molecule.6. The sensor of claim 1 , wherein the plurality of ligand molecules is selected from the group consisting of caffeic acid claim 1 , dopamine claim 1 , and 3 claim 1 ,4 dihydroxyphenylacetic acid.7. The sensor of claim 1 , wherein each of the plurality of ligand molecules comprises a hydroxyl functionality claim 1 , and further wherein the platform is OH-rich claim 1 , and the plurality of ligand ...

BI-REFORMING OF HYDROCARBONS TO PRODUCE SYNTHESIS GAS

Disclosed are catalysts, methods, and systems for the bi-reforming of hydrocarbons. The method includes contacting a catalyst material with a reactant feed that includes hydrogen (H), carbon monoxide (CO), carbon dioxide (CO), methane (CH), and water (HO) to produce a product stream that has a H/CO molar ratio of 1.4:1 to 2:1. The catalyst can have a metal oxide core, a redox metal oxide layer deposited on a surface of the metal oxide core, and a catalytically active metal deposited on the surface of the redox metal oxide layer. A dopant can be included in the redox metal oxide layer. The catalyst can have a corm-shell type structure. 1. A method of producing synthesis gas from methane , the method comprising contacting a reactant gas stream that includes hydrogen (H) , carbon monoxide (CO) , carbon dioxide (CO) , methane (CH) , and water (HO) with a catalyst material under conditions sufficient to produce a gaseous product stream comprising Hand CO in a H/CO molar ratio of 1.4 to 2.0 , wherein the catalyst material comprises:a chemically inactive metal oxide core;a redox metal oxide layer deposited on a surface of the metal oxide core, the redox metal oxide layer comprising a dopant; anda catalytically active metal deposited on the surface of the redox metal oxide layer.2. The method of claim 1 , wherein the reaction conditions include a temperature of 700° C. to 1000° C. claim 1 , a pressure of about 0.1 MPa to 2 MPa claim 1 , and a gas hourly space velocity of 500 hto 100 claim 1 ,000 h.3. The method of claim 1 , wherein the reactant stream comprises 25 vol. % to 40 vol. % H claim 1 , 5 vol. % to 30 vol. % CO claim 1 , 5 vol. % to 20 vol. % CO claim 1 , 10 vol. % to 30 vol. % CH claim 1 , and 10 vol. % to 30 vol. % HO.4. The method of claim 3 , wherein the reactant stream comprises 30 vol. % to 35 vol. % H claim 3 , 10 vol. % to 20 vol. % CO claim 3 , 10 vol. % to 15 vol. % CO claim 3 , 15 vol. % to 20 vol. % CH claim 3 , and 15 vol. % to 20 vol. % HO.5. The ...

HETEROGENEOUS CATALYSTS

Heterogeneous catalysts with optional dopants are provided. The catalysts are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane to C hydrocarbons. Related methods for use and manufacture of the same are also disclosed. 1. A catalyst comprising a mixed oxide base material , the mixed oxide comprising erbium (Er) and at least one further lanthanide element.2. The catalyst of claim 1 , wherein the mixed oxide comprises a physical blend of Er claim 1 , or an oxidized form thereof claim 1 , and the further lanthanide element claim 1 , or an oxidized form thereof.3. The catalyst of claim 1 , wherein the mixed oxide has the following formula (I):{'br': None, 'sub': x', 'y', 'z, 'LnErO\u2003\u2003 (I)'} Ln is the lanthanide element;', 'Er is erbium;', 'O is oxygen; and', 'x, y and z are each independently numbers greater than 0., 'wherein4. The catalyst of claim 3 , wherein x claim 3 , y and z are selected such that the overall charge of the catalyst is about 0.5. The catalyst of claim 3 , wherein x claim 3 , y and z are selected such that z is from 150% to 200% of the sum of x and y.6. The catalyst of claim 3 , wherein the mixed oxide is LnErOor LnErO.727-. (canceled)28. A bulk catalyst comprising a base material comprising an oxide of one or more lanthanide elements and a dopant combination selected from Sr/Ce claim 3 , Sr/Tb claim 3 , Sr/B and Sr/Hf/K.29. The catalyst of claim 28 , wherein the oxide has the following formula (III):{'br': None, 'sub': a', 'b', 'd', 'e', 'f', 'c, 'Ln1Ln2Ln3Ln4Ln5O\u2003\u2003 (III)'} Ln1, Ln2, Ln3, Ln4 and Ln5 are independently different lanthanide elements;', 'O is oxygen; and', 'a and c are each independently numbers greater than 0; and', 'b, d, e, and f are independently 0 or a number greater than 0., 'wherein30. The catalyst of claim 28 , wherein the dopant combination consists essentially of Sr/Ce claim 28 , Sr/Tb claim 28 , Sr/B or Sr/Hf/K.31. The catalyst of claim 28 , wherein the dopant ...

INTEGRATED CATALYST SYSTEM FOR STOICHIOMETRIC-BURN NATURAL GAS VEHICLES AND PREPARATION METHOD THEREFOR

Disclosed in the present invention is an integrated catalyst system for stoichiometric-burn natural gas vehicles, the catalyst system consisting of a three-way catalyst, a molecular sieve catalyst, and a base body, the three-way catalyst and the molecular sieve catalyst being coated on a surface of the base body. In the integrated three-way catalyst and molecular sieve catalyst system of the present invention, at the same time that pollutants such as CO, HC, and NOin the exhaust of stoichiometric-burn natural gas vehicles are processed, the produced byproduct NHcan also be processed, and the conversion rates of CO, HC, NO, and NHare high. 1. An integrated catalyst system for a stoichiometric-burn natural gas vehicle , characterized in that , the catalyst system consists of a three way catalyst , a molecular sieve catalyst and a base body , wherein the three way catalyst and the molecular sieve catalyst are coated on a surface of the base body , whereinthe three way catalyst and the molecular sieve catalyst are combined in the following way:the molecular sieve catalyst is uniformly added into a coating layer of the three way catalyst; orthe molecular sieve catalyst is coated on a surface of the three way catalyst; orthe molecular sieve catalyst is coated between two layers of the three way catalyst; orthe three way catalyst and the molecular sieve catalyst are coated in segments, wherein the three way catalyst is coated on a former segment of the base body, and the molecular sieve catalyst is coated on a latter segment of the base body.2. The integrated catalyst system according to claim 1 , characterized in that claim 1 , a combined loading amount of the three way catalyst and the molecular sieve catalyst is 150 g/L-300 g/L claim 1 , whereina loading amount ratio of the three way catalyst to the molecular sieve catalyst is (1:3)-(3:1).3. The integrated catalyst system according to claim 1 , characterized in that claim 1 , for the three way catalyst claim 1 , a ...

CATALYST ARTICLE AND THE USE THEREOF FOR FILTERING FINE PARTICLES

A catalyst article and its use in an exhaust system for internal combustion engines is disclosed. The catalyst article comprises a substrate which is a wall-flow filter, a first catalyst composition, and a second catalyst composition. The first and second catalyst compositions each independently comprise an oxygen storage component (OSC) derived from a CeZr mixed oxide sol having a D90 of less than 1.3 micron and a particulate inorganic oxide having a D90 of from 1 to 20 microns. 1. A catalyst article for treating an exhaust gas from a positive-ignition internal-combustion engine , the article comprising:a substrate which is a wall-flow filter having an inlet end and an outlet end and an axial length L therebetween, a plurality of inlet channels extending from the inlet end and a plurality of outlet channels extending from the outlet end,wherein the plurality of inlet channels comprise a first catalyst composition extending from the inlet or outlet end for at least 50% of L and the plurality of outlet channels comprise a second catalyst composition extending from the outlet or inlet end for at least 50% of L, wherein the first and second catalyst compositions overlap by at most 80% of L,wherein the first and second catalyst compositions each independently comprise an oxygen storage component (OSC) derived from a CeZr mixed oxide sol having a D90 of less than 1.3 micron and a particulate inorganic oxide having a D90 of from 1 to 20 microns.2. The catalyst article of claim 1 , wherein the CeZr mixed oxide sol has a D90 of less than 1.0 micron.3. The catalyst article of claim 1 , wherein the CeZr mixed oxide sol has a Z-average particle size of between 230 and 310 nm.4. The catalyst article of claim 1 , wherein the first and second catalyst compositions overlap by at most 20% of L.5. The catalyst article of claim 1 , wherein the first and second catalyst compositions overlap by at most 10% of L.6. The catalyst article of claim 1 , wherein the CeZr mixed oxide sol has a ...

CATALYTIC FORMS AND FORMULATIONS

Catalytic forms and formulations are provided. The catalytic forms and formulations are useful in a variety of catalytic reactions, for example, the oxidative coupling of methane. Related methods for use and manufacture of the same are also disclosed. 152-. (canceled)53. A catalytic material comprising a first and second catalyst , wherein the first and second catalysts have a different catalytic activity in the oxidative coupling of methane (OCM) reaction under the same conditions , wherein the catalytic material comprises a C2 selectivity of greater than 50% and a methane conversion of greater than 20% when the catalyst is employed as a heterogeneous catalyst in the oxidative coupling of methane at a temperature of 750° C. or less.54. The catalytic material of claim 53 , wherein the first catalyst is a nanowire catalyst.55. The catalytic material of claim 53 , wherein the second catalyst is a bulk catalyst.56. The catalytic material of claim 53 , wherein each of the first and second catalysts are nanowire catalysts.57. The catalytic material of claim 53 , wherein each of the first and second catalyst are bulk catalysts.58. The catalytic material of claim 53 , wherein the second catalyst has a lower catalytic activity than the first catalyst under the same conditions.59. The catalytic material of claim 58 , wherein the catalytic activity of the second catalyst increases with increasing temperature.6070-. (canceled)71. The catalytic material of claim 53 , wherein the catalytic material comprises a void fraction volume of about 35% to about 70%.72. The catalytic material of claim 71 , wherein the catalytic material comprises a void fraction volume of about 45% to about 65%.73. The catalytic material of claim 53 , wherein the catalytic material comprises catalyst particles having a cross sectional dimension in at least one dimension between about 1 mm and about 20 mm.74. The catalytic material of claim 73 , wherein the cross sectional dimension is between about 2 mm ...

COMPOSITE OXIDE

Provided are a composite oxide which is suitable as a co-catalyst for an exhaust gas purifying catalyst or the like, has high heat resistance, and has an excellent oxygen absorbing and desorbing capability at low temperatures and a method for producing the composite oxide. The composite oxide contains Ce and Zr, wherein the Ce content is 30 to 80 at % and the Zr content is 20 to 70 at %, based on the total of Ce and Zr being 100 at %, or further contains particular element M, wherein the Ce content is not less than 30 at % and less than 80 at %, the Zr content is not less than 20 at % and less than 70 at %, and the content of element M is more than 0 at % and not more than 15 at %, based on the total of Ce, Zr, and element M being 100 at %. 1. A method for producing a composite oxide comprising Ce and Zr , wherein a content of Ce is not less than 30 at % and not more than 80 at % and a content of Zr is not less than 20 at % and not more than 70 at % , based on a total of Ce and Zr being 100 at % , wherein said composite oxide has CaF-type structure phase or CaF-like structure phase , wherein a ratio of an actual lattice parameter in the (311) plane to theoretical lattice parameter (actual value/theoretical value) is 1.000 , and wherein said composite oxide has a property of exhibiting a total pore volume of not less than 0.30 cc/g after calcination at 1000° C. for 5 hours in atmosphere; (a) heating and holding an aqueous solution of zirconium containing zirconium ions at 90 to 100° C. for 5 to 12 hours,', '(b) mixing said aqueous solution of zirconium heated and held, with an aqueous solution of cerium not less than 90 mol % of which cerium ions are tetravalent, to obtain a mixed aqueous solution, and heating and holding said mixed aqueous solution at 90 to 100° C. for 15 to 25 hours,', '(c) mixing s aid mixed aqueous solution heated and held, with a precipitant containing a surfactant to obtain a precipitate, and', '(d) calcining said precipitate in an oxidizing ...

MICRON-SCALE CERIUM OXIDE PARTICLE HAVING MULTI-CORE SINGLE-SHELL STRUCTURE AND PREPARATION METHOD THEREFOR

The present invention involves micron-scale cerium oxide particles having a multi-cores single-shell structure, comprising: a cerium oxide shell, the shell being composed of crystalline and/or amorphous nano-scale cerium oxide particles; and a plurality of nano-scale cerium oxide grain cores aggregates located in the interior of the shell. Also involved is a preparation method for the micron-scale cerium oxide particle having a multi-cores single-shell structure. A supported catalyst with the micron-scale cerium oxide particles according to the invention as the support have good hydrothermal stability and good sulfur resistance, and the active components of the supported catalyst are not easily embedded, and the supported catalyst has a great application prospect in the field of catalytic oxidation of exhaust emissions such as CO, NO or volatile organic compounds. 1. A micro-scale cerium oxide particle having multi-cores single-shell structure , characterized in that the micro-scale cerium oxide particle comprises: a cerium oxide shell , the shell being composed of crystalline and/or amorphous nano-scale cerium oxide particles; and a plurality of nano-scale cerium oxide grain cores aggregates located in the interior of the shell.2. The micro-scale cerium oxide particle having multi-cores single-shell structure according to claim 1 , characterized in that the micro-scale cerium oxide particles are spherical or sphere-like particles claim 1 , having an average particle size of 0.5 μm to 50 μm claim 1 , and a BET specific surface area of 50 to 200 m/g; the mass of the plurality of nano-scale cerium oxide grain cores aggregates in the interior of the shell is from 85 to 99% based on the total mass of the micro-scale cerium oxide particles claim 1 , and the mass of the cerium oxide shell is from 1 to 15% based on the total mass of the micro-scale cerium oxide particles; the cerium oxide shell has a thickness ranging from 10 to 200 nm; the nano-scale cerium oxide grains ...

MULTIFUNCTIONAL CERIUM-BASED NANOMATERIALS AND METHODS FOR PRODUCING THE SAME

Embodiments relate to a cerium-containing nano-coating composition, the composition including an amorphous matrix including one or more of cerium oxide, cerium hydroxide, and cerium phosphate; and crystalline regions including one or more of crystalline cerium oxide, crystalline cerium hydroxide, and crystalline cerium phosphate. The diameter of each crystalline region is less than about 50 nanometers. 2. The method of claim 1 , further comprising preparing the substrate prior to immersion by one or more of grinding claim 1 , acid treatment claim 1 , and alkaline treatment.3. The method of claim 1 , wherein the substrate comprises one or more of aluminum or magnesium.4. The method of claim 3 , wherein the substrate comprises one of an AZ31 alloy claim 3 , an AZ61 alloy claim 3 , an AZ91 alloy claim 3 , an AM30 alloy claim 3 , an AM60 alloy claim 3 , an AA 7075-T6 alloy claim 3 , an AA 2024-T3 alloy claim 3 , and Al-clad alloys.5. The method of claim 1 , wherein the aqueous bath further comprises one or more of an accelerator and anti-bubbling agent.6. The method of claim 1 , wherein the diameter of each crystalline region of the phosphated nano-coating is less than 50 nanometers.7. The method of claim 2 , wherein preparing the substrate comprises surface grinding followed by acid treatment and then followed by alkaline immersion cleaning.8. The method of claim 2 , wherein preparing the substrate comprises acid treatment followed by alkaline immersion cleaning.9. The method of claim 2 , wherein acid treatment comprises treating using one or more of sulfuric acid claim 2 , nitric acid claim 2 , and hydrofluoric acid.10. The method of claim 1 , wherein the cerium-containing aqueous bath comprises about 0.1 wt. % to about 2.0 wt. % elemental cerium.11. The method of claim 1 , wherein the cerium-containing aqueous bath comprises one or more of CeCl3-7H2O and Ce(NO3)3-6H2O as cerium sources.12. the method of claim 1 , where the cerium-containing aqueous bath comprises one ...

OXYNITRIDE HYDRIDE, SUPPORTED METAL MATERIAL CONTAINING OXYNITRIDE HYDRIDE, AND CATALYST FOR AMMONIA SYNTHESIS

The invention provides a perovskite-type oxynitride hydride which can be easily synthesized by achieving both improvement in catalytic performance and stabilization when used as a support of a catalyst. The oxynitride hydride is represented by general formula (1a) or (1b). 1. An oxynitride hydride represented by the following general formula (1a) or (1b) ,{'br': None, 'sub': 3-x', 'y', 'z, 'ABONH\u2003\u2003(1a)'}{'br': None, 'sub': 2', '4-x', 'y', 'z, 'ABONH\u2003\u2003(1b)'}wherein, in the general formula (1a), A is at least one kind selected from the group consisting of Ba and Sr; B is Ce; x represents a number represented by 0.2≤x≤2.0; y represents a number represented by 0.1≤y≤1.0; and z represents a number represented by 0.1≤z≤1.0, andin the above general formula (1b), A is at least one kind selected from the group consisting of Ba and Sr; B is at least one kind selected from the group consisting of Ce, La and Y; x represents a number represented by 0.2≤x≤2.0; y represents a number represented by 0.1≤y≤1.0; and z represents a number represented by 0.1≤z≤1.0.2. A perovskite-type oxynitride hydride represented by the following general formula (2) ,{'br': None, 'sub': 3-x', 'y', 'z, 'BaCeONH\u2003\u2003(2)'}wherein, in the general formula (2), x represents a number represented by 0.2≤x≤2.0; y represents a number represented by 0.1≤y≤1.0; and z represents a number represented by 0.1≤z≤1.0.3. A supported metal material in which a transition metal (M) is supported on a support ,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'wherein the supported metal material is a composition comprising the oxynitride hydride according to .'}4. The supported metal material according to claim 3 , wherein a loading amount of the transition metal (M) is 0.01 parts by mass or more and 50 parts by mass or less with respect to 100 parts by mass of the support.5. The supported metal material according to claim 3 , wherein the transition metal (M) is at least one selected from the ...

FUNCTIONALIZED BORON NITRIDE CATALYSTS FOR THE PRODUCTION OF LIGHT OLEFINS FROM ALKANE FEEDS VIA OXIDATIVE DEHYDROGENATION

Disclosed is a catalyst comprising: a composition having a formula BNMOwherein B represents boron, N represents nitrogen, M comprises a metal or metalloid, and O represents oxygen, x ranges from 0 to 1, y ranges from 0.01 to 5.5; and z ranges from 0 to 16.5. The catalyst may be suitable for converting alkanes to olefins. 1. A catalyst comprising: {'br': None, 'sub': x', 'y', 'z, 'BNMO'}, 'a composition having a formula'} B represents boron, N represents nitrogen, M is platinum, silver, lanthanum, tin, cerium, zirconium, titanium, tin, strontium, magnesium, tungsten, copper, gallium, lithium, sodium, cesium, calcium, manganese, zinc, lead, barium, gallium, yttrium, ytterbium, silicon, cesium, germanium, niobium, vanadium, chromium, molybdenum, rhenium, or a combination thereof, and O represents oxygen,', 'x ranges from 0 to 1,', 'y ranges from 0.01 to 5.5; and', 'z ranges from 0 to 16.5., 'wherein'}2. The catalyst of claim 1 , wherein x ranges from 0.01 to 1.3. The catalyst of claim 1 , wherein x ranges from 0.9 to 1.4. The catalyst of claim 3 , wherein y and z range from 0.01 to 0.06.5. The catalyst of claim 4 , wherein y and z are 0.06.6. The catalyst of claim 5 , wherein x is equal to 1 and boron is present as a component of boron nitride.7. The catalyst of claim 3 , wherein y and z are equal.8. The catalyst of claim 3 , wherein M and O is speciated as magnesium oxide.9. The catalyst of claim 3 , wherein M is strontium and M and O is speciated as strontium oxide.10. The catalyst of claim 6 , wherein boron nitride is present as hexagonal boron nitride.11. The catalyst of claim 6 , wherein boron nitride is present as cubic claim 6 , wurtzitic claim 6 , or amorphous boron nitride.12. The catalyst of claim 3 , further comprising a support.13. The catalyst of claim 12 , wherein the catalyst is suitable for converting an alkane to an olefin and wherein the olefin comprises ethylene claim 12 , propylene claim 12 , butylene claim 12 , isobutene claim 12 , or a combination ...

NOx STORAGE REDUCTION CATALYST AND PRODUCTION METHOD THEREOF

An NOx storage reduction catalyst includes a catalyst support, and a catalyst metal and an NOx storage material supported thereon, wherein the catalyst metal is composed of a platinum-gold solid solution, and has a gold content of greater than 1 mol % but 20 mol % or less relative to the total molar number of platinum and gold contained in the catalyst metal. A method for producing an NOx storage reduction catalyst includes adding sodium borohydride to a mixed solution containing platinum ions and gold ions, thereby reducing the platinum ions and the gold ions to produce a catalyst metal composed of a platinum-gold solid solution; purifying the catalyst metal; and supporting the catalyst metal and an NOx storage material on a catalyst support. 1. An NOx storage reduction catalyst comprising a catalyst support , and a catalyst metal and an NOx storage material supported thereon , wherein said catalyst metal is composed of a platinum-gold solid solution , and has a gold content of greater than 1 mol % but 20 mol % or less relative to the total molar number of platinum and gold contained in said catalyst metal.2. The NOx storage reduction catalyst as claimed in claim 1 , wherein said catalyst metal has a gold content of 5 mol % or more but 10 mol % or less relative to the total molar number of platinum and gold contained in said catalyst metal.3. The NOx storage reduction catalyst as claimed in claim 1 , wherein said catalyst metal has an average primary particle diameter of greater than 0 nm but 10 nm or less.4. The NOx storage reduction catalyst as claimed in claim 3 , wherein said catalyst metal has an average primary particle diameter of greater than 0 nm but 5 nm or less.5. The NOx storage reduction catalyst as claimed in claim 1 , wherein when said catalyst metal is analyzed using a scanning transmission electron microscope equipped with an energy dispersive X-ray analyzer (STEM-EDX) under condition in which the spot size of an electron beam is 1 nm or less claim ...

POROUS HONEYCOMB STRUCTURE AND PRODUCING THE SAME

A porous honeycomb structure including multiple co-catalyst particles and multiple inorganic binder particles of smaller particle diameter than the co-catalyst particles. Each co-catalyst particle is comprised of a ceria-zirconia solid solution. The inorganic binder particles reside between the co-catalyst particles. In the honeycomb structure, an exposure fraction of the co-catalyst particles from the inorganic binder particles on a cross-section of the honeycomb structure is within a range of 3 to 10%. 1. A porous honeycomb structure comprising:multiple co-catalyst particles, each co-catalyst particle including a ceria-zirconia solid solution;multiple inorganic binder particles of smaller particle diameter than the co-catalyst particles, the inorganic binder particles residing between the co-catalyst particles,wherein an exposure fraction of the co-catalyst particles from the inorganic binder particles on a cross-section of the honeycomb structure is within a range of 3 to 10%.2. The honeycomb structure of claim 1 , wherein the exposure fraction is equal to or greater than 5%.3. The honeycomb structure of claim 1 , wherein a proportion of the inorganic binder particles is within a range of 7 to 18 parts by weight per 100 parts by weight of the co-catalyst particles.4. The honeycomb structure of claim 1 , wherein the inorganic binder particles comprise alumina.5. A method of producing the porous honeycomb structure of claim 1 , comprising:a first mixing step of mixing the co-catalyst particles and a first sol including the inorganic binder particles to produce a mixture slurry;a drying step of spray drying the mixture slurry to obtain composite particles including the co-catalyst particles and the inorganic binder particles coating the co-catalyst particles;a second mixing step of mixing the composite particles and a second sol including the inorganic binder particles to obtain kneaded clay;a forming step of forming the kneaded clay into a honeycomb shape to obtain ...

METHOD FOR PRODUCING COMPOSITE OXIDE AND COMPOSITE OXIDE CATALYST

Provided are a method for producing a composite oxide and the composite oxide. The method includes steps of: (a) preparing a Ce aqueous solution not less than 80 mol % of which Ce ions are tetravalent, and a Zr aqueous solution; (b1) mixing the Zr aqueous solution and a portion of the Ce aqueous solution to prepare a mixed aqueous solution (X1); (c1) hydrothermally processing the solution (X1); (b2) adding the remainder of the Ce aqueous solution of step (a) to a colloidal solution (Y1) of a composite salt obtained from step (c1) to prepare a colloidal solution (Y2) of a composite salt; (c2) hydrothermally processing the solution (Y2); (d) mixing a colloidal solution (Y3) of a composite salt obtained from step (c2) with an alkaline solution and a surfactant to prepare a precipitate; and (e) calcining the precipitate. 1. A composite oxide obtained by a method comprising the steps of:(a) preparing at least a cerium aqueous solution 80 to 100 mol % of which cerium ions are tetravalent, and a zirconium aqueous solution containing zirconium ions;(b1) mixing said zirconium aqueous solution and a portion of said cerium aqueous solution prepared in step (a) to prepare a mixed aqueous solution (X1);(c1) hydrothermally processing said mixed aqueous solution (X1);(b2) adding a remainder of said cerium aqueous solution prepared in step (a) to a colloidal solution (Y1) of a composite salt obtained by said hydrothermal processing in step (c1) to prepare a colloidal solution (Y2) of a composite salt;(c2) hydrothermally processing said colloidal solution (Y2) of a composite salt obtained from step (b2) ;(d) mixing a colloidal solution (Y3) of a composite salt obtained by said hydrothermal processing in step (c2) with an alkaline solution and a surfactant to prepare a precipitate; and(e) calcining said precipitate,wherein the composite oxide comprises Ce, Zr, Pr, and oxygen, andwherein the content of Zr is not less than 20 mol% and not more than 50 mol %, and the content of Pr is ...

Exhaust gas purifying catalyst and method for producing the same

Provided is an exhaust gas purifying catalyst with an excellent effect of suppressing deterioration due to aggregation of a noble metal catalyst that would occur during endurance at a high temperature. The exhaust gas purifying catalyst includes a porous support and a noble metal catalyst carried on the porous support. The porous support contains particles of an alumina-ceria-zirconia composite oxide, and the porous support has the following physical property values after subjected to baking at 900° C. for 5 hours: a pore diameter of the particles in the range of 2 to 20 nm, a specific surface area of the particles in the range of 75 to 115 m 2 /g, a crystallite size of a ceria-zirconia composite oxide that is contained in the particles in the range of 4 to 6 nm, and a bulk density of the particles in the range of 0.5 to 0.9 cm 3 /g.

Microwave absorbing carbon-metal oxides and modes of using, including water disinfection

Microwave absorbing materials are provided herein. Disclosed microwave absorbing materials include those comprising metal oxide nanocrystals hybridized to a carbon nanomaterial. Methods for making and using microwave absorbing materials are also disclosed, such as for generation of reactive oxygen species and disinfection of water.

CERIUM OXIDE PARTICLES AND METHOD FOR PRODUCTION THEREOF

The present invention relates to cerium oxide particles that have excellent heat resistance under hydrothermal conditions at high temperature. The present invention also relates to a method for preparing such cerium oxide particles and to a catalytic composition comprising said cerium oxide. 1. Cerium oxide particles exhibiting:{'sub': 2', '2', '2, 'sup': '2', 'a specific surface area (BET) after ageing at 800° C. for 16 hours, under a gaseous atmosphere containing 10% by volume of O, 10% by volume of HO and the balance of N, of at least 75 m/g; or'}{'sub': 2', '2', '2, 'sup': '2', 'a specific surface area (BET) after ageing at 700° C. for 16 hours, under a gaseous atmosphere containing 10% by volume of O, 10% by volume of HO and the balance of N, of at least 97 m/g.'}2. Cerium oxide particles according to claim 1 , exhibiting a specific surface area (BET) after ageing at 800° C. for 16 hours claim 1 , under a gaseous atmosphere containing 10% by volume of O claim 1 , 10% by volume of HO and the balance of N claim 1 , between 75 and 80 m/g.3. Cerium oxide particles according to claim 1 , exhibiting a specific surface area (BET) after ageing at 700° C. for 16 hours claim 1 , under a gaseous atmosphere containing 10% by volume of O claim 1 , 10% by volume of HO and the balance of N.4. Cerium oxide particles according to claim 1 , exhibiting a specific surface area (BET) after ageing at 700° C. for 16 hours claim 1 , under a gaseous atmosphere containing 10% by volume of O claim 1 , 10% by volume of HO and the balance of N claim 1 , between 97 and 102 m/g.5. Cerium oxide particles according to one of the preceding claims claim 1 , exhibiting a specific surface area (BET) after ageing at 900° C. for 16 hours claim 1 , under a gaseous atmosphere containing 10% by volume of O claim 1 , 10% by volume of HO and the balance of N claim 1 , of at least 39 m/g.6. Cerium oxide particles according to claim 1 , exhibiting a specific surface area (BET) after ageing at 900° C. for ...

Layered three-way conversion (twc) catalyst and method of manufacuring the catalyst

The presently claimed invention provides a layered three-way catalyst composition for purification of exhaust gases from internal combustion engines; said catalyst comprises a first layer comprising i) palladium supported on at least one alumina component and at least one oxygen storage component; and ii) barium oxide; wherein said first layer is essentially free of strontium, and a second layer comprising: i) rhodium supported on at least one zirconia component and/or alumina component; ii) strontium oxide and/or barium oxide; and iii) optionally, palladium supported on at least one alumina component. The presently claimed invention also provides a process for preparing the layered three-way catalyst composition which involves a technique such as incipient wetness impregnation technique(A); co-precipitation technique (B); or co-impregnation technique(C). The process includes preparing a first layer; preparing a second layer; and depositing the second layer on the first layer followed by calcination. The presently claimed invention further provides a a layered three-way catalytic article in which the three-way catalyst composition is deposited on a substrate in a layered fashion and its preparation.

CATALYST FOR AMMONIA DECOMPOSITION AND EXHAUST GAS TREATMENT METHOD

Provided is an ammonia decomposition catalyst that exhibits high durability while maintaining high ammonia decomposition activity and low emissions of nitrogen oxides, for example, even under an atmosphere with a steam concentration of about 10% by volume. An ammonia decomposition catalyst capable of decomposing ammonia contained in an exhaust gas, the catalyst comprising an inorganic oxide loaded with an alloy containing Pt and Pd, and a zeolite. 1. An ammonia decomposition catalyst capable of decomposing ammonia contained in an exhaust gas , the ammonia decomposition catalyst comprising:an inorganic oxide loaded with an alloy containing Pt and Pd, anda zeolite.2. The ammonia decomposition catalyst according to claim 1 , wherein the inorganic oxide is at least one selected from titania claim 1 , zirconia claim 1 , silica claim 1 , alumina claim 1 , and a ceria-zirconia composite oxide or solid solution.3. The ammonia decomposition catalyst according to claim 1 , wherein the zeolite is a β-type zeolite.4. The ammonia decomposition catalyst according to claim 1 , wherein the zeolite is a cupper ion-exchanged zeolite.5. The ammonia decomposition catalyst according to claim 1 , wherein the mass ratio of Pt and Pd (Pt/Pd) is in the range of from 0.1 to 10.6. A method for treating an exhaust gas claim 1 , the method comprising the step of bringing the ammonia decomposition catalyst according to into contact with an ammonia-containing exhaust gas to effect ammonia decomposition. The present invention relates to an ammonia decomposition catalyst and an exhaust gas treatment method.Ammonia-containing exhaust gases are typically generated in the electronic material manufacturing industry, the fertilizer production industry, or factories equipped with denitration facilities. Such exhaust gases need to be treated since they may often have a strong smell and may have an influence on the human body. The exhaust gases generated from the aforementioned emission sources generally ...

CERIA-ZIRCONIA-BASED COMPOSITE OXIDE OXYGEN STORAGE MATERIAL, EXHAUST GAS CLEANING CATALYST, AND HONEYCOMB STRUCTURE FOR EXHAUST GAS CLEANING

A ceria-zirconia-based composite oxide oxygen storage material with a fast oxygen storage rate having an OSC ability enabling fast response to changes in exhaust gas which does not greatly fluctuate in composition, but varies at a fast rate near the stoichiometric air-fuel ratio, an exhaust gas purification catalyst, and a honeycomb structure for exhaust gas purification are provided. 1. A ceria-zirconia-based composite oxide oxygen storage material , which oxygen storage material has a molar ratio of cerium and zirconium , by cerium/(cerium+zirconium) , of 0.33 to 0.90 , has an ion conductivity measured by an AC impedance method of 1×10S/cm or more at 400° C. , and contains metal ions M of a rare earth element with a coordination number of over 7.0 in an amount of 0.5 mol % to 15 mol % with respect to the total amount of cations.2. The oxygen storage material according to claim 1 , wherein said metal ions M are one or more types selected from Sm claim 1 , Eu claim 1 , Pr claim 1 , Gd claim 1 , and Dy.3. The oxygen storage material according to claim 1 , wherein an oxygen storage capacity amount (OSC amount) is 300 μmol-O/g or more.4. The oxygen storage material according to claim 1 , containing said metal ions M in an amount of 2 mol % to 6 mol % with respect to the total amount of cations.5. The oxygen storage material according to claim 1 , wherein said ceria-zirconia-based composite oxide contains metal ions having ion radii larger than Ce ions.6. An exhaust gas purification catalyst comprising an oxygen storage material according to supporting a precious metal.7. A honeycomb structure for exhaust gas purification comprised of an exhaust gas purification catalyst according to covering an inside wall of a metal or ceramic honeycomb.8. The oxygen storage material according to claim 2 , wherein an oxygen storage capacity amount (OSC amount) is 300 μmol-O/g or more.9. The oxygen storage material according to claim 2 , containing said metal ions M in an amount of 2 ...

NOx Trap Catalyst Support Material Composition

The present invention relates to a method of making a support material composition comprising an Mg/Al oxide, a cerium oxide and at least another rare earth element oxide, to a support material composition and to the use of the support material composition as a nitrogen oxide storage component within a catalyst for treating exhaust gases to reduce NOx content. 1. A method of preparing a support material composition , the composition comprising two phases:a first phase comprising a Mg/Al mixed oxide; anda second phase comprising a cerium based oxide, and rare-earth element(s) based oxide other than cerium oxide, wherein the second phase is a solid-solution; the method comprising the following steps:i) preparing an aqueous suspension of a Mg/Al mixed oxide precursor;ii) preparing an aqueous solution of a cerium salt;iii) preparing an aqueous solution of one or more rare-earth element oxides salt(s) other than cerium salts;iv) combining, in any order, at least the aqueous suspension in step i), with the aqueous solution in step ii), and the aqueous solution of step iii) to form an aqueous mixture;v) dying the aqueous mixture to form a dried particulate material; andvi) calcining the dried particulate material; the cerium salts from the aqueous solution of step ii) and', 'the rare earth element salt(s) other than cerium salts from the aqueous solution of step iii) and,, 'wherein the content of the one or more rare-earth element salt(s) other than cerium is between 5 and 50 wt. %, relative to the sum of'}wherein each of the salts are calculated as their oxides.2. The method of claim 1 , wherein the Mg/Al mixed oxide precursor is prepared by hydrolysis of a mixture of corresponding alkoxides of aluminium and magnesium that form a mixture of hydrotalcite claim 1 , boehmite claim 1 , and water.3. The method of claim 1 , wherein the cerium salt comprises one or more of cerium nitrate claim 1 , ammonium cerium nitrate claim 1 , cerium sulfate claim 1 , cerium carbonate claim ...

EXHAUST GAS PURIFICATION CATALYST

An exhaust gas purification catalyst includes a composite oxide support, and a precious metal catalyst supported on the composite oxide support. The composite oxide support includes alumina, zirconia, ceria, a first additive element oxide and a second additive element oxide. The first additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements. The second additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements. In the composite oxide support, alumina is contained in a range of 30 to 40% by mass and zirconia is contained in a range of 36 to 46% by mass. 18-. (canceled)9. An exhaust gas purification catalyst comprising:a composite oxide support including alumina, zirconia, ceria, a first additive element oxide and a second additive element oxide; anda precious metal catalyst supported on the composite oxide support,wherein alumina is contained in a range of 30 to 40% by mass in the composite oxide support;zirconia is contained in a range of 36 to 46% by mass in the composite oxide support;the first additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements; andthe second additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements;ceria is contained by 20% by mass in the composite oxide support;a rate of content of alumina and a rate of content of zirconia are defined so that a sum total of rates of content alumina, zirconia and ceria is less than 100% by mass in the composite oxide support;the first additive element oxide is lanthanum oxide;the second additive element oxide is neodymium oxide;the composite oxide support further contains yttrium oxide in the range of more than 0% by mass and 9% by ...

Treatment of quarry liquid effluent

Disclosed is a method for preparing a solid material including manganese, the method including the following steps: a. bringing into contact an aqueous effluent including manganese, for example at least 5 mg/L, typically at least 5 to 50 mg/L, and preferably 7 to 25 mg/L of manganese, with an oxidizing agent, manganese, preferably at a temperature between 10° C. and 50° C., and obtaining an oxidized aqueous solution; b. adding a base to the oxidized aqueous solution obtained at the end of step a) until a pH of between 8 and 12, preferably greater than 9, and preferably from 9 to 10.5, and obtaining a solution including a precipitate; c. filtration of the solution obtained at the end of step b); and d. obtaining a solid material including manganese, and especially manganese (IV) and/or Mn (III).

INORGANIC OXIDE

Provided is a powder inorganic oxide containing Al, Ce and Zr as constituent elements, that affords a molded product with a density of 1.0 to 1.3 g/ml by placing 4.0 g of the inorganic oxide in a cylindrical container having diameter 20 mm and performing uniaxial molding under conditions of room temperature and pressure of 29.4 MPa for 30 sec., and achieves an average shrinkage percentage of not more than 14.0% as calculated by the following formula: average shrinkage percentage (%)=100×{(1−(c)/(a))+(1−(d)/(b))}/2 wherein each symbol is as defined in the DESCRIPTION. 1. A powder inorganic oxide comprising Al , Ce and Zr as constituent elements ,that affords a molded product with a density of 1.0 to 1.3 g/ml by placing 4.0 g of the inorganic oxide in a cylindrical container having diameter 20 mm and performing uniaxial molding under conditions of room temperature and pressure of 29.4 MPa for 30 sec., and {'br': None, 'average shrinkage percentage (%)=100×{(1−(c)/(a))+(1−(d)/(b))}/2,'}, 'achieves an average shrinkage percentage of not more than 14.0% as calculated from by the following formulawherein (a) and (b) respectively represent a diameter and a height of the molded product, and (c) and (d) respectively represent a diameter and a height of a calcined product obtained by heating the molded product from room temperature to 1300° C. under an air atmosphere at a temperature-rising rate of 200° C./hr., maintaining the product at 1300° C. for 2 hr., and lowering the temperature thereof from 1300° C. to room temperature at a temperature-decreasing rate of 200° C./hr.2. The inorganic oxide according to claim 1 , wherein a content of Al in the inorganic oxide is 20 to 80 wt. % in terms of AlO.3. The inorganic oxide according to claim 1 ,{'sub': '2', 'wherein a content of Ce in the inorganic oxide is 10 to 40 wt. % in terms of CeO.'}4. The inorganic oxide according claim 1 , wherein a content of Zr in the inorganic oxide is 5 to 40 wt. % in terms of ZrO.54. The inorganic ...

METHODS OF MAKING YSZ SUPPORTED CATALYST, AND METHODS OF USING THE SAME

The present invention relates to catalysts, methods of making catalysts, and methods of using catalysts, where the catalysts include: at least one of a transition metal and a transition metal oxide supported by yttria-stabilized zirconia (YSZ), where the transition metal is promoted by at least one of an alkali metal and an alkaline-earth metal. 1. A catalyst , comprising:at least one of a transition metal and a transition metal oxide supported by yttria-stabilized zirconia (YSZ), wherein the transition metal is promoted by at least one of an alkali metal and an alkaline-earth metal.2. The catalyst of claim 1 , wherein the YSZ is a porous YSZ tube.3. The catalyst of claim 1 , wherein the at least one of the transition metal and the transition metal oxide is ruthenium (Ru).4. The catalyst of claim 3 , wherein the at least one of the alkali metal and the alkaline-earth metal is barium (Ba).5. The catalyst of claim 3 , wherein the at least one of the alkali metal and the alkaline-earth metal is cesium (Cs).6. The catalyst of claim 1 , the at least one of the transition metal and the transition metal oxide is partially reduced.7. The catalyst of claim 3 , wherein the Ru is supported on Ba-modified and potassium (K)-modified zirconium dioxide (ZrO).8. The catalyst of claim 3 , wherein the Ru is alloyed with the yttrium of the YSZ.9. The catalyst of claim 3 , wherein the YSZ is a porous tube comprising an outside diameter of about 1 cm and a wall thickness of about 0.134 cm.10. The catalyst of claim 3 , wherein the porous tube comprises about 4% yttrium oxide (YO) and about 96% zirconium dioxide (ZrO).11. The catalyst of claim 3 , wherein a (Brunauer claim 3 , Emmett and Teller) BET surface area of the YSZ is about 2.24 mg.12. A method of making a catalyst claim 3 , comprising:providing a support comprising a porous tube yttria-stabilized zirconia (YSZ);loading at least one of a transition metal and a transition metal oxide onto the support using wet impregnation; ...

PARTIAL OXIDATION PROCESS OF HYDROCARBONS

A partial oxidation process of hydrocarbons is provided, including bringing an inlet gas into contact with a catalyst, the inlet gas including a hydrocarbon raw material gas and a hydrogen chloride gas, wherein the catalyst includes a catalyst material including palladium (Pd), which catalyst material is supported on a carrier including cerium oxide (CeO) and an amount of catalyst material supported on the carrier is 2 wt % to 10 wt % based on a total weight of the catalyst. 1. A partial oxidation process of hydrocarbons , comprising:contacting inlet gas with a catalyst, said inlet gas comprising a hydrocarbon raw material gas and a hydrogen chloride gas,{'sub': '2', 'wherein the catalyst comprises a catalyst material comprising palladium (Pd), which catalyst material is supported on a carrier comprising cerium oxide (CeO), and'}an amount of catalyst material supported on the carrier is 2 wt % to 10 wt % based on a total weight of the catalyst.2. The partial oxidation process of claim 1 , wherein a ratio of volume flow rates of the hydrocarbon raw material gas to the hydrogen chloride gas is 1:1 to 10:1.3. The partial oxidation process of claim 1 , wherein the inlet gas further comprises an oxygen gas claim 1 , and a ratio of volume flow rates of the hydrocarbon raw material gas to the oxygen gas is 1:1 to 10:1.4. The partial oxidation process of claim 1 , wherein the process is performed at a process temperature of 450° C. to 600° C. and a pressure of 0.5 atm to 3 atm.5. The partial oxidation process of claim 1 , wherein a space velocity of the inlet gas is 10 claim 1 ,000 ml/(h·gcat) to 50 claim 1 ,000 ml/(h·gcat).6. The partial oxidation process of claim 1 , wherein the inlet gas further comprises at least one inert gas selected from the group consisting of nitrogen gas claim 1 , helium gas claim 1 , argon gas claim 1 , and carbon dioxide gas.7. The partial oxidation process of claim 6 , wherein a ratio of volume flow rates of the hydrocarbon raw material gas to ...

NOx TRAP

A NOx trap comprises components comprising at least one platinum group metal, at least one NOx storage material and bulk ceria or a bulk cerium-containing mixed oxide deposited uniformly in a first layer on a honeycombed substrate monolith, the components in the first layer having a first, upstream, zone having increased activity relative to a second, downstream zone for oxidising hydrocarbons and carbon monoxide, and a second, downstream, zone having increased activity to generate heat during a desulphation event, relative to the first zone, wherein the second zone comprises a dispersion of rare earth oxide, wherein the rare earth oxide loading in the second zone is greater than the loading in the first zone. An exhaust system for a lean burn internal combustion engine, a vehicle comprising a lean burn internal combustion engine and the exhaust system and methods of making the NOx trap are also disclosed. 1. A catalyst article for treating NOin an exhaust gas comprising:a. a honeycomb substrate having an inlet end and an outlet end, with the inlet and outlet ends being relative to gas flow through the substrate;b. an upstream catalyst zone and a downstream catalyst zone coated on the substrate, with the upstream and downstream zones being relative to gas flow through the substrate;wherein the first catalyst zone comprises an alkali metal and/or an alkaline earth metal, at least one of platinum and palladium, and is essentially free of rare earth metals, and wherein the second catalyst zone comprises a platinum group metal and particulate ceria and/or particulate cerium/zirconium mixed oxide.2. The catalyst article of claim 1 , wherein the first catalyst zone is a first layer and the second catalyst zone is a second layer claim 1 , and wherein the second layer overlays the first layer.3. The catalyst article of claim 1 , wherein the second catalyst zone has a lower washcoat loading relative to the first catalyst zone.4. The catalyst article of claim 1 , wherein the ...

NOx ADSORBER CATALYST, METHODS AND SYSTEMS

A lean burn engine exhaust treatment articles comprising a low temperature lean NOtrap (LT-LNT) composition and methods for their use is disclosed. A lean burn engine exhaust gas treatment system including the lean burn engine exhaust treatment articles is also disclosed. The low temperature lean NOtrap (LT-LNT) compositions can comprise a washcoat layer on a carrier substrate, the washcoat layer including a platinum group metal component impregnated on a first support material comprising at least 50% alumina. The washcoat layer may further include a low temperature NOstorage material comprising a bulk particulate reducible metal oxide. Methods of monitoring the aging state of a lean burn oxidation catalyst in a lean burn engine catalyst system are also disclosed. 1. A lean burn engine exhaust treatment article comprising:{'sub': x', 'x, 'a low temperature lean NOtrap (LT-LNT) composition including a washcoat layer on a carrier substrate, the washcoat layer including a platinum group metal component impregnated on a first support material comprising at least 50% alumina, the washcoat layer further including a low temperature NOstorage material comprising a bulk particulate reducible metal oxide.'}2. the lean burn engine exhaust treatment article of claim 1 , wherein the first support material comprises 100% alumina.3. The lean burn engine exhaust treatment article of claim 1 , wherein the first support material consists essentially of ceria and alumina.4. The lean burn engine exhaust treatment article of claim 3 , wherein the first support material comprises 20-50% by weight ceria and 50-80% by weight alumina.5. The lean burn engine exhaust treatment article of claim 3 , wherein the ceria and alumina are present in a ratio of 30:70 of ceria to alumina.6. The lean burn engine exhaust treatment article of claim 3 , wherein the ceria and alumina are present in a ratio of 50:50 of ceria to alumina.7. The lean burn engine exhaust treatment article of claim 1 , wherein ...

LEAN NOx TRAP WITH ENHANCED HIGH AND LOW TEMPERATURE PERFORMANCE

A lean NOtrap composition for the treatment of exhaust gas emissions, such as the oxidation of unburned hydrocarbons (HC), and carbon monoxide (CO), and the trapping and reduction of nitrogen oxides (NO) is disclosed. The lean NOtrap composition can have a washcoat layer on a carrier substrate including a first support material comprising greater than 50% by weight of a reducible metal oxide; 10 to 30% by weight of alkaline earth metal supported on a second support material comprising a refractory metal oxide and 50% or less by weight of a reducible metal oxide and; and a platinum group metal component supported on at least one of the first support material and/or the second support material. A portion of the first support material may further include 0.5% to 10% by weight of an alkaline earth metal. 1. A lean NOtrap composition comprising:a washcoat layer on a carrier substrate including:a first support material comprising greater than 50% by weight of a reducible metal oxide;10 to 30% by weight of alkaline earth metal supported on a second support material comprising a refractory metal oxide and 50% or less by weight of a reducible metal oxide; anda platinum group metal component supported on at least one of the first support material and the second support material.2. The lean NOtrap composition of claim 1 , wherein 0.5% to 10% by weight of alkaline earth metal is supported on a portion of the first support material.3. The lean NOtrap composition of claim 2 , wherein 3% to 6% by weight of alkaline earth metal supported on a portion of the first support material.4. The lean NOtrap composition of claim 1 , wherein the reducible metal oxide is one or more selected from the group consisting of CeO claim 1 , MnO claim 1 , MnO claim 1 , FeO claim 1 , CuO claim 1 , and CoO.5. The lean NOtrap composition of claim 1 , wherein the first support material further comprises alumina.6. The lean NOtrap composition of claim 1 , wherein the first support material further ...