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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 4184. Отображено 100.
15-03-2012 дата публикации

Exhaust gas-purifying catalyst

Номер: US20120065058A1
Автор: Akimasa Hirai, Kenichi Taki, Satoshi Matsueda, Yuji Yabuzaki
Принадлежит: Cataler Corp

An exhaust gas-purifying catalyst according to the present invention includes a substrate, a first catalytic layer facing the substrate and includes at least one precious metal selected from the group consisting of palladium and platinum, and alumina doped with an alkaline-earth metal element, and a second catalytic layer facing the substrate with the first catalytic layer interposed therebetween or intervening between the substrate and the first catalytic layer, the second catalytic layer includes rhodium and alumina doped with the alkaline-earth metal element.

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Номер записи: 1
17-05-2012 дата публикации

Exhaust gas-purifying catalyst

Номер: US20120122672A1
Автор: Akimasa Hirai, Asuka Hori, Keiichi Narita, Kenichi Taki, Masahiro Kusaka, Satoshi Matsueda
Принадлежит: Cataler Corp

An exhaust gas-purifying catalyst includes first particles of oxygen storage material, second particles of one or more rare-earth elements other than cerium and/or compounds thereof interposed between the first particles, and third particles of one or more precious metal elements interposed between the first particles, wherein a spectrum of a characteristic X-ray intensity for one of the rare-earth element(s) and a spectrum of a characteristic X-ray intensity for one of the precious metal element(s) that are obtained by performing a line analysis using energy-dispersive X-ray spectrometry along a length of 500 nm have a correlation coefficient of 0.68 or more.

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Номер записи: 2
06-01-2022 дата публикации

CATALYTIC COMPOSITION WITH ADDED COPPER TRAPPING COMPONENT FOR NOx ABATEMENT

Номер: US20220001371A1
Автор: Yuejin Li
Принадлежит: BASF Corp

The present disclosure provides catalyst compositions for NOx conversion and wall-flow filter substrates comprising such catalyst compositions. Certain catalyst compositions include a zeolite with sufficient Cu exchanged into cation sites thereof to give a Cu/Al ratio of 0.1 to 0.5 and a CuO loading of 1 to 15 wt. %; and a copper trapping component (e.g., alumina) including a plurality of particles having a D90 particle size of about 0.5 to 20 microns in a concentration of about 1 to 20 wt. %. The zeolite and copper trapping component can be in the same washcoat layer or can be in different washcoat layers (such that the copper trapping component serves as a “pre-coating” on the wall-flow filter substrate).

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Номер записи: 3
07-01-2021 дата публикации

EXHAUST GAS PURIFICATION DEVICE

Номер: US20210001315A1
Автор: AKITA Shingo, ENDO Yoshinori, KURIHARA Hiroki, NABEMOTO Takeshi, NAGAI Yusuke, SAKURADA Yu
Принадлежит:

A substrate () includes an inflow-side cell (), an outflow-side cell (), and a porous, gas-permeable partition wall () that separates the inflow-side cell () and the outflow-side cell () from each other, and also includes a first catalyst portion () that is provided on a side of the partition wall () that faces the inflow-side cell () at least at a portion in upstream side in an exhaust gas flow direction, and a second catalyst portion () that is provided on a side of the partition wall that faces the outflow-side cell at least at a portion in downstream side. With respect to a pore volume of pores with a pore size of 10 to 18 μm, when a measured value of the pore volume in the first catalyst portion () and the partition wall () within a region where the first catalyst portion () is provided is defined as a first pore volume, and a measured value of the pore volume in the second catalyst portion () and the partition wall () within a region where the second catalyst portion () is provided is defined as a second pore volume, the first pore volume is greater than the second pore volume. A catalytically active component contained in the first catalyst portion () and a catalytically active component contained in the second catalyst portion () are of different types. 1. An exhaust gas purification catalyst comprising:a substrate; anda catalyst portion provided in the substrate, an inflow-side cell including a space whose inflow-side in an exhaust gas flow direction is open and whose outflow-side is closed;', 'an outflow-side cell including a space whose inflow-side in the exhaust gas flow direction is closed and whose outflow-side is open; and', 'a porous partition wall that separates the inflow-side cell and the outflow-side cell from each other, and, 'the substrate including a first catalyst portion that is provided at least on a portion of a side of the partition wall that faces the inflow-side cell, the portion being located on an upstream side in the flow direction; ...

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Номер записи: 4
02-01-2020 дата публикации

CATALYST COMBINING PLATINUM GROUP METAL WITH COPPER-ALUMINA SPINEL

Номер: US20200001280A1
Автор: Hoke Jeffrey B., Ilinich Oleg
Принадлежит:

An oxidation catalyst composition is provided, the composition including at least one platinum group metal impregnated onto a porous alumina material, wherein the porous alumina material comprises a copper-alumina spinel phase. At least a portion of the copper-alumina spinel phase can be proximal to, or in direct contact with, at least one platinum group metal crystallite, such as a crystallite having a size of about 1 nm or greater. The close proximity of the copper-alumina spinel phase to the platinum group metal crystallite is believed to provide synergistic enhancement of carbon monoxide oxidation. Methods of making and using the catalyst composition are also provided, as well as emission treatment systems comprising a catalyst article coated with the catalyst composition. 1. An oxidation catalyst composition , the composition comprising at least one platinum group metal impregnated onto a porous alumina material , wherein the porous alumina material comprises a copper-alumina spinel phase.2. The oxidation catalyst composition of claim 1 , wherein at least one portion of the copper-alumina spinel phase is proximal to claim 1 , or in direct contact with claim 1 , at least one platinum group metal crystallite.3. The oxidation catalyst composition of claim 2 , wherein at least one portion of the copper-alumina spinel phase is proximal to claim 2 , or in direct contact with claim 2 , at least one platinum group metal crystallite having a crystallite size of about 1 nm or greater.4. The oxidation catalyst composition of claim 3 , wherein at least one portion of the copper-alumina spinel phase is proximal to claim 3 , or in direct contact with claim 3 , at least one platinum group metal crystallite having a crystallite size of about 50 nm or greater.5. The oxidation catalyst composition of claim 2 , wherein the at least one portion of the copper-alumina spinel phase is within about 50 nm of the at least one platinum group metal crystallite.6. The oxidation catalyst ...

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Номер записи: 5
05-01-2017 дата публикации

CATALYST FOR PURIFYING COMBUSTION EXHAUST GAS, AND METHOD FOR PURIFYING COMBUSTION EXHAUST GAS

Номер: US20170001181A1
Автор: Hikazudani Susumu, Shimizu Kana, Shono Emi, YOSHIDA Satoshi
Принадлежит:

To provide a catalyst for purifying a combustion exhaust gas and a method for purifying a combustion exhaust gas. The denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto, contains zeolite as a support having supported thereon a catalyst metal, in a powder X-ray diffraction (XRD) measurement of the denitration catalyst a ratio (relative peak intensity ratio) r=I/J of a height I of a diffraction peak at a diffraction angle (2θ) of from 7.8 to 10.0° and a height J of a diffraction peak at a diffraction angle (2θ) of from 28.0 to 31.0° being in a range of from 3.0 to 5.0. 1. A denitration catalyst used in a method for purifying a combustion exhaust gas of removing a nitrogen oxide in the exhaust gas by making the catalyst into contact with the combustion exhaust gas having an alcohol as a reducing agent added thereto , the denitration catalyst comprising zeolite as a support having supported thereon cobalt (Co) as a catalyst metal , in a powder X-ray diffraction measurement of the denitration catalyst a ratio r=I/J of a height I of a diffraction peak at a diffraction angle (2θ) of from 7.8 to 10.0° and a height J of a diffraction peak at a diffraction angle (2θ) of from 28.0 to 31.0° being in a range of from 3.0 to 5.0.2. The catalyst for purifying a combustion exhaust gas according to claim 1 , wherein the zeolite as a support contains zeolite that has been baked in an inert gas atmosphere in advance.3. (canceled)4. (canceled)5. The catalyst for purifying a combustion exhaust gas according to claim 1 , wherein the alcohol as a reducing agent is methanol or ethanol.6. A method for purifying a combustion exhaust gas claim 1 , comprising making a combustion exhaust gas having an alcohol as a reducing agent added thereto claim 1 , into contact with a denitration catalyst containing a ...

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Номер записи: 6
03-01-2019 дата публикации

METHOD FOR THE PREPARATION OF A CATALYSED MONOLITH

Номер: US20190001305A1
Автор: Johansen Keld
Принадлежит: Haldor Topsoe A/S

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 ...

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Номер записи: 7
03-01-2019 дата публикации

METHOD FOR THE PREPARATION OF A ZONE COATED CATALYSED MONOLITH

Номер: US20190001318A1
Автор: Johansen Keld
Принадлежит: Haldor Topsoe A/S

Method for zone coating of monolithic substrates by using different sol-solution containing different catalyst carrier precursors and metal catalyst precursors and suction of one of the sol-solution up into pores in the walls of the zone to be coated, solely by capillary forces and another different sol-solution into the walls of another zone to be coated by capillary forces. 1. A method for the preparation of a catalysed monolith zone coated with different catalysts , 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) providing a first sol solution in an amount corresponding to at least the pore volume in a first catalyst zone of the gas permeable partition walls to be coated with the first sol solution, the first sol solution containing water soluble or suspended precursors of one or more catalytically active compounds and water soluble or suspended precursors or oxides of one or metal oxides catalyst carrier compounds, at least one of the one or more precursors or oxides is suspended and at least one of the one or more precursors is dissolved in the sol solution;c) providing a second sol solution in an amount corresponding to at least the pore volume in a second catalyst zone of the gas permeable partition walls to be coated with the second sol solution, the second sol solution containing water soluble or suspended precursors of one or more catalytically active compounds different to the catalytically active compounds in the first sol solution and water soluble or suspended precursors or oxides of one or more metal oxides catalyst carrier compounds, at least one of the one or more precursors or oxides is suspended and at least one of the one or more precursors is dissolved in the second sol solution;d) placing the porous monolith substrate substantially ...

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Номер записи: 8
02-01-2020 дата публикации

AERODYNAMIC CATALYTIC CONVERTER

Номер: US20200003100A1
Автор: JAN JONATHAN, Snaper Alvin A.
Принадлежит:

An improved catalytic converter includes a Coanda chamber assembly connected upstream of a catalytic reaction chamber, where the exhaust pipe is to be connected to the Coanda chamber assembly. The Coanda chamber assembly forms a Coanda chamber that has at least one narrower section and at least one wider section immediately downstream of the narrower section, with openings formed at the narrowest point of a narrower section. In operation, when engine exhaust gas is fed into the Coanda chamber, the gas pressure increases at the narrower section, and drops when the gas enters the wider section. As a result, air is sucked into the Coanda chamber via the openings and mixes with the exhaust gas. This lowers the exhaust temperature and enhances the efficiency of the catalytic reactions in the catalytic reaction chamber. 1. A catalytic converter comprising:a catalytic reaction chamber, which includes a catalytic reactor housing and a catalytic reactor core disposed inside the catalytic reactor housing; anda Coanda chamber assembly, having a downstream end connected to the catalytic reaction chamber and an upstream end adapted to be connected to an exhaust pipe, the Coanda chamber assembly including an interior housing which defines an interior space, wherein the interior space extends in a longitudinal direction and has varying diameters along the longitudinal direction defining a plurality of sections, including at least a first narrower section and a first wider section immediately downstream of the first narrow section, wherein a lateral dimension of a widest point of the first wider section is 2 to 3 times a lateral dimension of a narrowest point of the first narrower section, the interior housing further including one or more openings located at the narrowest point of the first narrower section or between the narrowest point of the first narrower section and the widest point of the first wider section.2. The catalytic converter of claim 1 , wherein the catalytic ...

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Номер записи: 9
11-01-2018 дата публикации

Catalyzed ceramic candle filter and method of cleaning process off- or exhaust gases

Номер: US20180008963A1
Автор: Francesco Castellino, Lars Storm PEDERSEN
Принадлежит: Haldor Topsoe AS

Ceramic candle filter and use of the filter in the removal of particulate matter in form of soot, ash, metals and met-al compounds, together with hydrocarbons and nitrogen oxides being present in process off-gas or engine exhaust gas, the filter includes a combined SCR and oxidation catalyst being arranged on the dispersion side and within wall of the filter; and a palladium including catalyst arranged on the permeation side and within wall of the filter facing the permeation side.

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Номер записи: 10
11-01-2018 дата публикации

CATALYZED CERAMIC CANDLE FILTER AND METHOD FOR CLEANING OF OFF- OR EXHAUST GASES

Номер: US20180008964A1
Автор: Castellino Francesco, PEDERSEN Lars Storm
Принадлежит: Haldor Topsoe A/S

Ceramic candle filter and use of the filter in the removal of particulate matter in form of soot, ash, metals and metal compounds, together with hydrocarbons and nitrogen oxides being present in process off-gas or engine exhaust gas, the filter comprises a combined SCR and oxidation catalyst arranged at least on the dispersion side and/or within wall of the filter, the combined SCR and oxidation catalyst comprises palladium, a vanadium oxide and titania. 1. A ceramic candle filter suitable for the removal of particulate matter in form of soot , ash , metals and metal compounds , together with hydrocarbons and nitrogen oxides being present in process off-gas or engine exhaust gas , the filter comprises a combined SCR and oxidation catalyst arranged at least on the dispersion side and/or within wall of the filter , the combined SCR and oxidation catalyst comprises palladium , a vanadium oxide and titania.2. The ceramic candle filter of claim 1 , wherein the catalyst contains palladium in an amount of between 20 and 1000 ppm/weight of the filter.3. The ceramic candle filter according to claim 1 , wherein the ceramic material of the filter is selected from the group of silica-aluminate claim 1 , calcium-magnesium-silicates claim 1 , calcium-silicates fibers claim 1 , or a mixture thereof.4. The ceramic candle filter according to claim 1 , wherein the ceramic material of the filter consists of bio-soluble fibres selected from the group of calcium-magnesium-silicates.5. A method for the removal of particulate matter in form of soot claim 1 , ash claim 1 , metals and metal compounds claim 1 , together with hydrocarbons and nitrogen oxides being present in process off-gas or engine exhaust gas claim 1 , comprising the steps ofproviding a process off-gas or engine exhaust gas containing a nitrogenous reductant or adding the nitrogenous reductant to the off- or exhaust gas;passing the off-gas or the exhaust through a ceramic candle filter and capturing the particulate matter; ...

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Номер записи: 11
11-01-2018 дата публикации

CATALYZED CERAMIC CANDLE FILTER AND METHOD OF CLEANING PROCESS OFF- OR EXHAUST GASES

Номер: US20180008965A1
Автор: Castellino Francesco, PEDERSEN Lars Storm, Thøgersen Joakim Reimer
Принадлежит: Haldor Topsoe A/S

Ceramic candle filter and use of the filter in the removal of particulate matter in form of soot, ash, metals and metal compounds, together with hydrocarbons and optionally nitrogen oxides being present in process off-gas or engine exhaust gas, wherein a noble metal comprising catalyst is arranged on the permeation side of the filter and/or on the dispersion side of the filter and/or within wall of the filter, said noble metal comprising catalyst contains a noble metal in an amount of between 20 and 1000 ppm/weight of the filter. 1. A ceramic candle filter , wherein a noble metal comprising catalyst is arranged on the permeation side of the filter and/or on the dispersion side of the filter and/or within wall of the filter , said noble metal comprising catalyst contains a noble metal in a total amount of between 20 and 1000 ppm/weight of the filter.2. The ceramic candle filter of claim 1 , wherein the noble metal is palladium and/or platinum.3. The ceramic candle filter of claim 1 , wherein the noble metal comprising catalyst further comprises a vanadium oxide and titania.4. The ceramic candle filter according to claim 1 , wherein the ceramic material of the filter is selected from the group of silica-aluminate claim 1 , calcium-magnesium-silicates claim 1 , calcium-silicates fibers claim 1 , or a mixture thereof.5. The ceramic candle filter according to claim 4 , wherein the ceramic material of the filter consists of bio-soluble fibres selected from the group of calcium-magnesium-silicates.6. A method for the removal of particulate matter in form of soot claim 4 , ash claim 4 , metals and metal compounds claim 4 , together with hydrocarbons and carbon monoxide being present in process off-gas or engine exhaust gas claim 4 , comprising the steps ofpassing the off-gas or the exhaust gas through a ceramic candle filter and capturing the particulate matter;reducing amounts of soot in the particulate matter captured on dispersion side of the filter and reducing amounts ...

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Номер записи: 12
14-01-2021 дата публикации

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Номер: US20210008531A1
Автор: Dettling Joseph C., Patchett Joseph A., Przybylski Elizabeth A.
Принадлежит:

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 1. A catalyst article consisting essentially of a wall flow monolith and a catalytic material , wherein the wall flow monolith has a plurality of longitudinally extending passages fatined by longitudinally extending walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , the wall flow monolith has a porosity of from 50% to 60% and an average pore size of from 10 to 25 microns , and the wall flow monolith contains the catalytic material;{'sup': '3', 'wherein the catalytic material comprises an SCR catalyst composition including a slurry-loaded washcoat of a zeolite and base metal selected from one or more of a copper and iron component, the washcoat permeating the walls at a loading up to 2.4 g/in, the wall flow monolith having integrated, NOx and particulate removal efficiency in which presence of the catalytic material in the wall flow monolith catalyzes the oxidation of soot.'}2. The catalyst article of claim 1 , wherein the SCR catalyst composition permeates the walls of the monolith at a concentration of at least 1.3 g/in.3. The catalyst article of claim 2 , wherein there is from 1.6 to 2.4 g/inof SCR catalyst composition disposed on the wall flow monolith.4. The catalyst article of claim 1 , wherein the SCR catalyst composition is effective to catalyze the reduction of NOx at a temperature below about 600° C. and is able to aid in regeneration of the wall flow monolith by lowering the temperature at which soot captured by the wall flow monolith is combusted.5. The catalyst article of ...

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Номер записи: 13
08-01-2015 дата публикации

Catalyzed SCR Filter and Emission Treatment System

Номер: US20150011377A1
Автор: Dettling Joseph C., Patchett Joseph A., Przybylski Elizabeth A.
Принадлежит:

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 1. A catalyst article consisting essentially of a wall flow monolith and a catalytic material ,wherein the wall flow monolith has a plurality of longitudinally extending passages formed by longitudinally extending walls bounding and defining said passages, wherein the passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end, the wall flow monolith has a porosity of from 50% to 60% and an average pore size of from 10 to 25 microns, and the wall flow monolith contains the catalytic material;{'sup': '3', 'wherein the catalytic material comprises an SCR catalyst composition including a slurry-loaded washcoat of a zeolite and base metal selected from copper, the washcoat permeating the walls at a loading up to 2.4 g/in, the wall flow monolith having integrated, NOx and particulate removal efficiency in which presence of the catalytic material in the wall flow monolith catalyzes the oxidation of soot.'}2. The catalyst article of claim 1 , wherein the SCR catalyst composition permeates the walls of the monolith at a concentration of at least 1.3 g/in.3. The catalyst article of claim 2 , wherein there is from 1.6 to 2.4 g/inof SCR catalyst composition disposed on the wall flow monolith.4. The catalyst article of claim 1 , wherein the SCR catalyst composition is effective to catalyze the reduction of NOx at a temperature below about 600° C. and is able to aid in regeneration of the wall flow monolith by lowering the temperature at which soot captured by the wall flow monolith is combusted.5. The catalyst article of claim 1 , wherein the SCR catalyst ...

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Номер записи: 14
11-01-2018 дата публикации

EXHAUST GAS TREATMENT DEVICE HAVING INTEGRATED GAS SAMPLING SENSOR

Номер: US20180010507A1
Автор: Ardanese Raffaello, Brown David B., Di Perna Luciano Nunziato, Li Jianwen, Mital Rahul
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An exhaust gas treatment device includes a housing having a wall. The wall of the housing defines an interior chamber. A substrate is supported by the housing within the interior chamber of the housing. The substrate extends along a longitudinal axis. The substrate includes a flow through structure that allows the flow of exhaust gas to flow through the substrate. The substrate includes a catalytic composition disposed thereon for reacting with the flow of exhaust gas. The substrate includes a cavity, extending along a cavity axis, which is transverse to the longitudinal axis of the substrate. A sensor is attached to the housing. The sensor includes a probe that at least partially extends into the cavity of the substrate, for sensing a gaseous component in the flow of exhaust gas. The cavity mixes the flow of exhaust gas and directs the exhaust gas toward the probe of the sensor. 1. An exhaust gas treatment device comprising:a housing defining an interior chamber;a substrate having a flow through structure and supported by the housing within the interior chamber of the housing;a catalytic composition disposed on the substrate for reacting with a flow of exhaust gas;wherein the substrate includes a cavity; anda sensor attached to the housing and including a probe at least partially extending into the cavity of the substrate.2. The exhaust gas treatment device set forth in claim 1 , wherein the sensor is one of a NOsensor claim 1 , an oxygen sensor claim 1 , a particulate matter sensor claim 1 , or an ammonia sensor.3. The exhaust gas treatment device set forth in claim 1 , wherein the catalytic composition includes at least one of: platinum claim 1 , palladium claim 1 , rhodium claim 1 , cerium claim 1 , iron claim 1 , manganese claim 1 , nickel claim 1 , copper claim 1 , or aluminum oxide.4. The exhaust gas treatment device set forth in claim 1 , wherein the housing includes an inlet for receiving the flow of exhaust gas claim 1 , and an outlet for discharging the ...

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Номер записи: 15
19-01-2017 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20170014804A1
Автор: Inatomi Yusaku, Sakano Mitsuru
Принадлежит:

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 ...

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Номер записи: 16
18-01-2018 дата публикации

OXIDATION CATALYST FOR A STOICHIOMETRIC NATURAL GAS ENGINE

Номер: US20180015446A1
Автор: Chen Hai-Ying, FEDEYKO Joseph, Lu Jing, REINING Arthur
Принадлежит:

An oxidation catalyst for treating an exhaust gas produced by a stoichiometric natural gas (NG) engine comprising a substrate and a catalytic material for oxidising hydrocarbon (HC), wherein the catalytic material for oxidising hydrocarbon (HC) comprises a molecular sieve and a platinum group metal (PGM) supported on the molecular sieve, wherein the molecular sieve has a framework comprising silicon, oxygen and optionally germanium. 1. An oxidation catalyst for treating an exhaust gas produced by a stoichiometric natural gas (NG) engine comprising:a substrate having an inlet end and an outlet end;{'sub': '3); and', 'a first region comprising a catalytic material for oxidising ammonia (NH'}a second region comprising a catalytic material for oxidising hydrocarbon (HC);wherein the catalytic material for oxidising hydrocarbon (HC) comprises a molecular sieve and a platinum group metal (PGM) supported on the molecular sieve, wherein the molecular sieve has a framework comprising silicon and oxygen or a framework comprising silicon, oxygen and germanium; andthe second region is arranged to contact the exhaust gas at the outlet end of the substrate and after contact of the exhaust gas with the first region.2. An oxidation catalyst according to claim 1 , wherein the catalytic material for oxidising ammonia (NH) comprises a molecular sieve and optionally a transition metal claim 1 , which is supported on the molecular sieve.3. An oxidation catalyst according to claim 2 , wherein the molecular sieve is a small pore molecular sieve.4. An oxidation catalyst according to claim 2 , wherein the molecular sieve is an aluminosilicate molecular sieve or a silico-aluminophosphate (SAPO) molecular sieve.5. An oxidation catalyst according to claim 2 , wherein the molecular sieve has a framework type selected from CHA claim 2 , LEV claim 2 , ERI claim 2 , DDR claim 2 , KFI claim 2 , EAB claim 2 , PAU claim 2 , MER claim 2 , AEI claim 2 , GOO claim 2 , YUG claim 2 , GIS claim 2 , VNI and ...

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Номер записи: 17
17-01-2019 дата публикации

EXHAUST GAS PURIFICATION DEVICE

Номер: US20190015820A1
Автор: HOSHINO Sho, KASUYA Chihiro, Matsueda Satoshi, Taki Kenichi
Принадлежит: CATALER CORPORATION

An exhaust gas purification device which has improved exhaust gas purification performance. An exhaust gas purification device which includes a first catalyst layer that contains: a Pd-supporting catalyst which is obtained by having alumina carrier particles support Pd; a first Rh-supporting catalyst which is obtained by having first ceria-zirconia carrier particles support Rh; and second ceria-zirconia carrier particles. This exhaust gas purification device is configured such that: the ceria concentration in the first ceria-zirconia carrier particles is 30 wt % or less; and the amount of ceria in the second ceria-zirconia carrier particles is larger than the amount of ceria in the first ceria-zirconia carrier particles. 1. An exhaust gas purification device , having a first catalyst layer containing a Pd-supporting catalyst supporting Pd on an alumina carrier particle , a first Rh-supporting catalyst supporting Rh on a first ceria-zirconia carrier particle , and a second ceria-zirconia carrier particle; wherein ,the ceria concentration in the first ceria-zirconia carrier particle is 30% by weight or less and the amount of ceria in the second ceria-zirconia carrier particle is larger than the amount of ceria in the first ceria-zirconia carrier particle.2. The exhaust gas purification device according to claim 1 , wherein the ceria concentration in the second ceria-zirconia carrier particle is greater than 30% by weight.3. The exhaust gas purification device according to claim 1 , wherein the first catalyst layer further contains barium sulfate.4. The exhaust gas purification device according to claim 1 , having a second catalyst layer on the lower side of the first catalyst layer.5. The exhaust gas purification device according to claim 4 , wherein the second catalyst layer contains barium sulfate.6. The exhaust gas purification device according to claim 4 , wherein the second catalyst layer contains a second Rh-supporting catalyst supporting Rh on the first ceria- ...

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Номер записи: 18
21-01-2021 дата публикации

EXHAUST TREATMENT SYSTEM INCLUDING NICKEL-CONTAINING CATALYST

Номер: US20210016257A1
Автор: Cavataio Giovanni, Harrington Rachael Jean, Hepburn Jeffrey Scott, Jen Hungwen, Thanasiu Eva
Принадлежит:

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 ...

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Номер записи: 19
21-01-2021 дата публикации

EXHAUST SYSTEM INCLUDING SCRF CATALYST WITH OXIDATION ZONE

Номер: US20210017889A1
Автор: BERGEAL David, BROWN GAVIN, HOUEL Valerie, WALTON MARK, WIJEMANNE Thilanka
Принадлежит:

Systems and methods of the present invention related to an exhaust gas purification system comprising: (a) a first injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas; (b) a diesel particulate filter including an inlet and an outlet, wherein the filter includes a selective catalyst reduction (SCR) catalyst and an oxidation catalyst; (c) a second injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, located downstream of the filter; and (d) a downstream catalyst comprising a selective catalytic reduction catalyst, located downstream of the second injector. 1. An exhaust gas purification system comprising:a. a first injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas;b. a diesel particulate filter including an inlet and an outlet, wherein the filter includes a selective catalyst reduction (SCR) catalyst and an oxidation catalyst;c. a second injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, located downstream of the filter; andd. a downstream catalyst comprising a selective catalytic reduction catalyst, located downstream of the second injector.2. The exhaust gas purification system of claim 1 , wherein the oxidation catalyst is coated on the outlet of the filter.3. The exhaust gas purification system of claim 1 , wherein the oxidation catalyst comprises one or more platinum group metals.4. The exhaust gas purification system of claim 1 , wherein the oxidation catalyst comprises platinum claim 1 , palladium claim 1 , or combinations thereof.5. The exhaust gas purification system of claim 1 , wherein the selective catalytic reduction catalyst comprises a metal oxide based SCR catalyst formulation claim 1 , a molecular sieve based SCR catalyst formulation claim 1 , or mixtures thereof.6. The exhaust gas purification system of claim 1 , wherein the downstream catalyst further comprises an ammonia oxidation catalyst.7. ...

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Номер записи: 20
25-01-2018 дата публикации

CATALYST BINDERS FOR FILTER SUBSTRATES

Номер: US20180021768A1
Автор: CHANDLER Guy, Flanagan Keith, Green Alexander, MARVELL David, Phillips Paul
Принадлежит:

Provided is a catalyst washcoat comprising (i) a molecular sieve loaded with about 1 to about 10 weight percent of at least non-aluminum promoter metal (wherein the promoter metal weight percent is based on the weight of the molecular sieve); and (ii) about 1 to about 30 weight percent of a binder having a d90 particle size of less than 10 microns (wherein the binder weight percent is based on the total weight of the washcoat). In another aspect of the invention, the catalyst washcoat is applied to a wall-flow filter to form a catalyst article. In another aspect of the invention the catalyst article is part of an exhaust gas treatment system. And in yet another aspect of the invention, provided is a method for treating exhaust gas using the catalyst article. 1. A catalytic article:a. a honeycomb wall-flow filter having porous walls;b. a catalyst washcoat disposed on and/or within at least a portion of the porous walls, wherein the catalyst washcoat comprises (i) a molecular sieve having about 1 to about 10 weight percent of at least one non-aluminum promoter metal, based on the total weight of the molecular sieve; and (ii) about 1 to about 30 weight percent of a binder having a d90 particle size of less than 10 microns, based on the total weight of the washcoat.2. The catalyst article of claim 1 , wherein the d90 particle size is less than 5 microns.3. The catalyst article of claim 1 , wherein the d90 particle size is greater than 1 micron.4. The catalyst article of claim 1 , wherein the binder is selected from the group consisting alumina claim 1 , silica claim 1 , ceria claim 1 , titania claim 1 , zirconia claim 1 , or combinations of two or more of these.5. The catalyst article of claim 1 , wherein the binder is alumina.6. The catalyst article of claim 5 , wherein the alumina is selected from gamma-alumina and theta alumina.7. The catalyst article of claim 1 , wherein the honeycomb wall-flow filter is a ceramic monolith.8. The catalyst article of claim 1 , ...

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Номер записи: 21
25-01-2018 дата публикации

Exhaust gas purification device for internal combustion engine

Номер: US20180023436A1
Автор: Koichi Inaba, Masafumi Sakota, Michitaka Yamaguchi, Nobuhiro Komatsu, Ryosaku Takahara, Takahiro Kogawa
Принадлежит: Honda Motor Co Ltd, Mitsui Mining and Smelting Co Ltd

An exhaust gas purification device is equipped with: an NOx purification unit disposed in exhaust gas piping of an engine supporting an NOx storage catalyst (NSC); a catalyzed soot filter (CSF) disposed downstream of the NOx purification unit supporting a particulate combustion catalyst causing captured particulates to combust; and an electronic control unit (ECU) which controls exhaust gas flowing into the NSC to be rich and which, by raising the temperature of the NSC, acts as a regeneration device that causes sulfur components captured in the NSC to be desorbed. The particulate combustion catalyst is provided where Ag and Pd have been alloyed on an Al 2 O 3 carrier; the quantity of Ag supported by the Al 2 O 3 carrier is 1.2-2.5 g/L; the quantity of Pd supported by the Al 2 O 3 carrier is 0.7 g/L or less; and the ratio Ag/Pd of the Ag support quantity to the Pd support quantity is 1.7-8.3.

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Номер записи: 22
10-02-2022 дата публикации

MUFFLER INCLUDING AN INTERNAL PHOTOCATALYST AND A LIGHT SOURCE

Номер: US20220042440A1
Автор: Young Roger K.
Принадлежит: Pure-Light Technologies, Inc.

A muffler includes a muffler housing having an exhaust gas inlet port adapted for securing to an exhaust pipe of an automobile so that exhaust gases from an internal combustion engine of the automobile are directed through the muffler housing from the exhaust gas inlet to an exhaust gas outlet. The muffler housing includes a plurality of rigid surfaces that form an exhaust gas pathway including a plurality of turns and lead from the exhaust gas inlet port to the exhaust gas outlet port. A photocatalyst coating is secured to an area of the rigid surfaces, and a light source is secured to the muffler housing and positioned to direct light onto the photocatalyst coating. The exhaust gases come into contact with the photocatalyst coating and reactive species generated by the photocatalyst coating decompose one or more pollutants in the exhaust gas. 1. A muffler , comprising:a muffler housing having an exhaust gas inlet port adapted for securing to an exhaust pipe of an automobile so that exhaust gases from an internal combustion engine of the automobile are directed through the muffler housing from the exhaust gas inlet to an exhaust gas outlet;a plurality of rigid surfaces within the muffler housing, wherein the plurality of rigid surfaces form an exhaust gas pathway including a plurality of turns and leading from the exhaust gas inlet port to the exhaust gas outlet port;a photocatalyst coating secured to an area of the rigid surfaces; anda light source secured to the muffler housing and positioned to direct light onto the photocatalyst coating, wherein the exhaust gases come into contact with the photocatalyst coating and reactive species generated by the photocatalyst coating decompose one or more pollutants in the exhaust gas.2. The muffler of claim 1 , wherein the photocatalyst coating includes:a binder layer secured to the surface of the transparent substrate; anda transparent semiconductor photocatalyst layer secured to the transparent binder layer.3. The muffler ...

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Номер записи: 23
28-01-2021 дата публикации

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

Номер: US20210023542A1
Автор: CHEN Qizhang, CHENG Yongxiang, DU Hongyi, Li Yun, Wang Yun, WU Dongdong, WU Ganxue, Yan Yi, ZHOU Xueqing, ZU Guangfa
Принадлежит:

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 ...

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Номер записи: 24
23-01-2020 дата публикации

DIESEL OXIDATION CATALYST CONTAINING MANGANESE

Номер: US20200025051A1
Автор: Hengst Christoph, KATO Naohiro
Принадлежит: UMICORE AG & CO. KG

The present invention relates to a diesel oxidation catalyst, which comprises a carrier body having a length L extending between a first end face a and a second end face b and a catalytically active material zone A arranged on the carrier body, wherein the material zone A contains palladium and platinum on a manganese-containing carrier oxide, wherein the carrier oxide consists of a carrier oxide component A and a carrier oxide component B and the carrier oxide component B consists of manganese and/or a manganese compound and is present in an amount of 5 to 15 wt. %, calculated as MnOand based on the total weight of the manganese-containing carrier oxide. 1. A diesel oxidation catalyst , which comprises a carrier body having a length L extending between a first end face a and a second end face b and a catalytically active material zone A arranged on the carrier body , wherein the material zone A contains palladium and platinum supported on a manganese-containing carrier oxide , wherein the manganese-containing carrier oxide consists of carrier oxide component A and a carrier oxide component B and the carrier oxide component B consists of manganese and/or a manganese compound and is present in an amount of 5 to 15 wt. % , calculated as MnOand based on the total weight of the manganese-containing carrier oxide.2. Diesel oxidation catalyst according to claim 1 , wherein the carrier oxide component A is selected from the series consisting of aluminum oxide claim 1 , doped aluminum oxide claim 1 , silicon oxide claim 1 , titanium dioxide and mixed oxides containing one or more of said oxides.3. Diesel oxidation catalyst according to claim 1 , wherein the carrier oxide component A is doped aluminum oxide.4. Diesel oxidation catalyst according to claim 1 , wherein the carrier oxide component A is a mixed oxide comprising aluminum oxide and silicon oxide or a silicon-oxide-doped aluminum oxide.5. Diesel oxidation catalyst according to claim 1 , wherein claim 1 , the carrier ...

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Номер записи: 25
04-02-2016 дата публикации

Exhaust After-treatment System Having Low Temperature SCR Catalyst

Номер: US20160032803A1
Автор: Ettireddy Padmanabha Reddy, Kotrba Adam J., Smirniotis Panagiotis, Spinks Thomas, Thirupathi Boningari
Принадлежит:

An aftertreatment system for treating exhaust gas discharged from a combustion engine, the aftertreatment system comprising a low temperature selective-catalytic-reduction catalyst, wherein the low-temperature selective-catalytic-reduction catalyst is a mixture of catalytic metals provided on a beta-zeolite support material, the mixture of catalytic metals being at least one mixture selected from Cu and Ce, Mn and Ce, Mn and Fe, Cu and W, Mn and W, and Ce and W. 1. An aftertreatment system for treating exhaust gas discharged from a combustion engine , the aftertreatment system comprising a low temperature selective-catalytic-reduction catalyst , wherein the low-temperature selective-catalytic-reduction catalyst is a mixture of catalytic metals provided on a beta-zeolite support material , the mixture of catalytic metals being at least one mixture selected from Cu and Ce , Mn and Ce , Mn and Fe , Cu and W , Mn and W , and Ce and W.2. The aftertreatment system according to claim 1 , wherein a loading of each metal in each mixture is in the range of 0.5 to 20 wt % claim 1 , with the balance comprising the beta-zeolite support material.3. The aftertreatment system according to claim 1 , wherein a mass ratio of an amount of a first catalytic metal relative to an amount of a second catalytic metal in each mixture is in the range of 1.5 to 40.4. The aftertreatment system according to claim 1 , wherein a mass ratio of an amount of a first catalytic metal relative to an amount of a second catalytic metal in each mixture is in the range of 3 to 25.5. The aftertreatment system according to claim 1 , wherein a mass ratio of an amount of a first catalytic metal relative to an amount of a second catalytic metal in each mixture is in the range of 5 to 20.6. The aftertreatment system according to claim 1 , wherein the mixtures of catalytic metal are formed by at least one method selected from the group consisting of cation exchange claim 1 , deposition precipitation claim 1 , ...

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Номер записи: 26
05-02-2015 дата публикации

HONEYCOMB FILTER

Номер: US20150033690A1
Автор: MIWA Yuki, SHIBATA Toshiaki
Принадлежит: IBIDEN CO., LTD.

A honeycomb filter includes a silicon carbide honeycomb fired body, an end face, and porous cell walls. The silicon carbide honeycomb fired body includes a plurality of cells through which exhaust gas is to flow and which include exhaust gas introduction cells and exhaust gas emission cells. The silicon carbide honeycomb fired body includes silicon carbide grains having a silicon-containing oxide layer with a thickness of 0.1 to 2 μm on surfaces of the silicon carbide grains. The end face has an aperture ratio of not less than 20% at the exhaust gas emission side. The porous cell walls define rims of the plurality of cells. The plugged portions of the exhaust gas introduction cells are arranged in vertical and horizontal lines with the porous cell walls residing between the plugged portions in the end face at the exhaust gas emission side. 1. A honeycomb filter comprising:a silicon carbide honeycomb fired body comprising a plurality of cells through which exhaust gas is to flow and which include exhaust gas introduction cells and exhaust gas emission cells, the exhaust gas introduction cells each having an open end at an exhaust gas introduction side and a plugged end at an exhaust gas emission side, the exhaust gas emission cells each having an open end at the exhaust gas emission side and a plugged end at the exhaust gas introduction side, the silicon carbide honeycomb fired body including silicon carbide grains having a silicon-containing oxide layer with a thickness of 0.1 to 2 μm on surfaces of the silicon carbide grains, the exhaust gas introduction cells and the exhaust as emission cells each having a uniform cross sectional shape except for a plugged portion in a cross section perpendicular to a longitudinal direction of the plurality of cells thoroughly from the exhaust gas introduction side to the exhaust gas emission side;an end face with an aperture ratio of not less than 20% at the exhaust gas emission side; andporous cell walls defining rims of the ...

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Номер записи: 27
05-02-2015 дата публикации

HONEYCOMB FILTER

Номер: US20150033691A1
Автор: MIWA Yuki, SHIBATA Toshiaki
Принадлежит: IBIDEN CO., LTD.

A honeycomb filter includes a plurality of cells and porous cell walls. The plurality of cells include exhaust gas introduction cells and exhaust gas emission cells. Each of the exhaust gas emission cells is adjacently surrounded fully by the exhaust gas introduction cells across the porous cell walls. The exhaust gas introduction cells include first exhaust gas introduction cells and second exhaust gas introduction cells. Each of the first exhaust gas introduction cells has the cross sectional area equal to or smaller than 0.7 mmin the cross section perpendicular to the longitudinal direction of the plurality of cells. 1. A honeycomb filter comprising:a plurality of cells through which exhaust gas is to flow and which include exhaust gas introduction cells and exhaust gas emission cells, the exhaust gas introduction cells each having an open end at an exhaust gas introduction side and a plugged end at an exhaust gas emission side, the exhaust gas emission cells each having an open end at the exhaust gas emission side and a plugged end at the exhaust gas introduction side, the exhaust gas introduction cells and the exhaust gas emission cells each having a uniform cross sectional shape except for a plugged portion in a cross section perpendicular to the longitudinal direction of the plurality of cells thoroughly from the end at the exhaust gas introduction side to the end at the exhaust gas emission side;porous cell walls defining rims of the plurality of cells, each of the exhaust gas emission cells being adjacently surrounded fully by the exhaust gas introduction cells across the porous cell walls;the exhaust gas introduction cells including first exhaust gas introduction cells and second exhaust gas introduction cells, each of the second exhaust gas introduction cells having a cross sectional area larger than a cross sectional area of each of the first exhaust gas introduction cells in the cross section perpendicular to the longitudinal direction of the plurality ...

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Номер записи: 28
05-02-2015 дата публикации

Temperature gradient correction of ammonia storage model

Номер: US20150033704A1
Автор: James M. Perrin, Justin Adam Shetney, Paul Jasinkiewicz, Raffaello Ardanese
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An exhaust gas treatment system includes a SCR device that stores a reductant that reacts with the NOx emissions and a reductant supply system to inject the reductant according to a reductant load model. At least one temperature sensor or model generates a temperature signal indicating an SCR temperature of the SCR device. The exhaust gas treatment system further includes a control module in electrical communication with the reductant supply system. The control module is configured to determine an amount of reductant that slips from the SCR device based on the at least one temperature signal and the rate of change of the SCR temperature. The control module further determines a correction factor based on the amount of slipped reductant to modify the reductant load model.

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Номер записи: 29
30-01-2020 дата публикации

TWC CATALYSTS CONTAINING HIGH DOPANT SUPPORT

Номер: US20200030776A1
Автор: JING Yuan, NAGAOKA Shuhei, SHIMIZU Ken-ichi, TOYAO Takashi
Принадлежит:

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate; and a first catalytic region on the substrate; wherein the first catalytic region comprises a first PGM component and a first inorganic oxide, wherein the IR intensity ratio of bridge CO to atop CO on the PGM component is less than 3:1 under standard CO adsorption procedure. 1. A catalyst composition comprising a platinum group metal (PGM) component and an inorganic oxide , wherein the Infrared (IR) intensity ratio of bridge CO to atop CO on the PGM component is less than 3:1 under standard CO adsorption procedure.2. The catalyst composition of claim 1 , wherein the inorganic oxide is alumina.3. The catalyst composition of claim 1 , wherein the inorganic oxide is doped with a dopant.4. The catalyst composition of claim 3 , wherein the dopant is selected from the group consisting of La claim 3 , Sr claim 3 , Si claim 3 , Ba claim 3 , Y claim 3 , Pr claim 3 , Nd claim 3 , and Ce.5. The catalyst composition of claim 3 , wherein the dopant content in the inorganic oxide is 10%-30 wt. %.6. The catalyst composition of claim 4 , wherein the dopant is La.7. The catalyst composition of claim 1 , wherein the PGM is Pd.8. (canceled)9. (canceled)10. A catalyst composition comprising a platinum group metal (PGM) component and an inorganic oxide claim 1 , wherein the Infrared (IR) intensity ratio of gem-dicarbonyl CO to atop CO on the PGM component is less than 5:1 under standard CO adsorption procedure.11. The catalyst composition of claim 10 , wherein the inorganic oxide is alumina.12. The catalyst composition of claim 10 , wherein the inorganic oxide is doped with a dopant.13. The catalyst composition of claim 12 , wherein the dopant is selected from the group consisting of La claim 12 , Sr claim 12 , Si claim 12 , Ba claim 12 , Y claim 12 , Pr claim 12 , Nd claim 12 , and Ce.14. The catalyst ...

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Номер записи: 30
04-02-2021 дата публикации

A FAST BATCH PROCESS FOR PREPARING A ZEOLITIC MATERIAL HAVING FRAMEWORK TYPE CHA

Номер: US20210031175A1
Автор: CHAIKITTISILP Watcharop, Iyoki Kenta, Mueller Ulrich, Parvulescu Andrei-Nicolae, WAKIHARA Torn
Принадлежит:

A batch process for preparing a zeolitic material having framework type CHA and a framework structure comprising Si, Al, O, and H, comprising (i) providing a seeding material comprising a zeolitic material having framework type CHA and a framework structure comprising Si, Al, O, and H; (ii) preparing a mixture comprising a source of Si, a source of Al, a seeding material provided in (i), a CHA framework structure directing agent comprising a cycloalkylammonium compound, and water, wherein the cycloalkylammonium compound is a compound comprising a cation RRRRN wherein R, R, Rare, independently from one another, an alkyl residue having from 1 to 6 carbon atoms, and Ris a 5- to 8-membered cycloalkyl residue, wherein in mixture, the molar ratio of water relative to Si comprised in the source of Si and in the seeding material, calculated as SiO, is in the range of from 5:1 to 15:1, wherein the mixture, the molar ratio of sodium, calculated as NaO, relative to Si comprised in the source of Si and in the seeding material, calculated as SiO, is in the range of from 0:1 to 0.1:1; (iii) heating the mixture prepared in (ii) in its liquid state to a temperature of the mixture in the range of from 50 to 90° C. and keeping the liquid mixture at a temperature in this range for 5 to 100 h; (iv) heating the heated mixture of (iii) to a temperature of the mixture in the range of from 190 to 230° C. in a crystallization vessel and keeping the mixture at a temperature in this range under autogenous pressure in the crystallization vessel for 0.5 to 10 h, obtaining a solid material comprising a zeolitic material having framework type CHA and a framework structure comprising Si, Al, O, and H, suspended in its mother liquor. 1. A process for preparing a zeolitic material having a framework type CHA and a framework structure comprising Si , Al , O , and H , the process comprising:providing a seeding material comprising a zeolitic material having a framework type CHA and a framework ...

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Номер записи: 31
31-01-2019 дата публикации

Exhaust gas treatment systems utilizing a single electrically heated catalyst

Номер: US20190032533A1
Автор: Charles Solbrig, Yong Miao
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Exhaust gas systems include an oxidation catalyst (OC) capable of receiving exhaust gas and oxidizing one or more of combustable hydrocarbons (HC) and one or more nitrogen oxide (NOx) species, a selective catalytic reduction device (SCR) disposed downstream from and in fluid communication with the OC via a conduit, and an electrically heated catalyst (EHC) disposed at least partially within the conduit downstream from the OC and upstream from the SCR. The EHC comprises a heating element having an outer surface including one or more second oxidation catalyst materials capable of oxidizing CO, HC, and one or more NOx species. The OC includes one or more storage materials individually or collectively capable of storing NOx and/or HC species. Exhaust gas can be supplied by an internal combustion engine which can optionally power a vehicle.

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Номер записи: 32
30-01-2020 дата публикации

INTEGRATED EMISSIONS CONTROL SYSTEM

Номер: US20200032686A1
Автор: Neubauer Torsten, Patwardhan Pushkaraj, Sung Shiang
Принадлежит:

The disclosure provides a monolithic wall-flow filter catalytic article including a substrate having an aspect ratio of from about 1 to about 20, and having a functional coating composition disposed on the substrate, the functional coating composition including a first sorbent composition, an oxidation catalyst composition, and optionally, a second sorbent composition. The monolithic wall-flow filter catalytic article may be in a close-coupled position close to the engine. The disclosure further provides an integrated exhaust gas treatment system including the monolithic wall-flow filter catalytic article and may additionally include a flow-through monolith catalytic article. The flow-through monolith catalytic article includes a substrate having a selective catalytic reduction (SCR) coating composition disposed thereon. The integrated exhaust gas treatment system simplifies the traditional four-article system into a two-article Catalyzed Soot Filter (CSF) plus Selective Catalytic Reduction (SCR) CSF+SCR arrangement. 1. A monolithic wall-flow filter catalytic article comprising:a substrate having an axial length L, a diameter D, and a volume, wherein the substrate comprises a front, upstream end and a rear, downstream end defining the axial length, an aspect ratio defined by L/D of from about 1 to about 20; anda functional coating composition disposed on the substrate, the functional coating composition comprising a first sorbent composition, an oxidation catalyst composition, and optionally, a second sorbent composition.2. The monolithic wall-flow filter catalytic article of claim 1 , wherein the first sorbent composition comprises one or more of alkaline earth metal oxides claim 1 , alkaline earth metal carbonates claim 1 , rare earth oxides claim 1 , or molecular sieves.3. The monolithic wall-flow filter catalytic article of claim 1 , wherein the first sorbent composition comprises a zeolite selected from the group consisting of faujasite claim 1 , chabazite ...

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Номер записи: 33
30-01-2020 дата публикации

MULTI-LAYER NITROGEN OXIDE STORAGE CATALYST WITH MANGANESE

Номер: US20200032687A1
Автор: Hoyer Ruediger, Mueller Elena, UTSCHIG Thomas
Принадлежит: UMICORE AG & CO. KG

The Invention relates to a nitrogen oxide storage catalyst composed of at least two catalytically-active washcoat layers on a support body, wherein a lower washcoat layer A comprises cerium oxide, an alkaline earth metal compound and/or an alkali compound, platinum and palladium, and manganese oxide, and an upper washcoat layer B disposed on the washcoat layer A comprises cerium oxide, platinum and palladium and does not contain any alkali and alkaline-earth compounds, and to a method for converting NOin exhaust gases from motor vehicles which are operated with lean-burn engines. 1. Nitrogen oxide storage catalyst composed of at least two catalytically-active washcoat layers on a support body , whereina lower washcoat layer A contains cerium oxide, an alkaline earth compound and/or an alkali compound, platinum and palladium, as well as manganese oxide; andan upper washcoat layer B arranged above washcoat layer A contains cerium oxide, as well as platinum and palladium, and is free of alkali compounds and alkaline earth compounds.2. Nitrogen oxide storage catalyst according to claim 1 , characterized in that washcoat layer A contains cerium oxide in a quantity of 110 to 160 g/L.3. Nitrogen oxide storage catalyst according to claim 1 , characterized in that washcoat layer B contains cerium oxide in a quantity of 22 to 120 g/L.4. Nitrogen oxide storage catalyst according to claim 1 , characterized in that the alkaline earth compound in washcoat layer A is an oxide claim 1 , carbonate claim 1 , and/or hydroxide of magnesium claim 1 , strontium claim 1 , and/or barium.5. Nitrogen oxide storage catalyst according to one claim 1 , characterized in that the alkaline earth compound in washcoat layer A is magnesium oxide claim 1 , barium oxide claim 1 , and/or strontium oxide.6. Nitrogen oxide storage catalyst according to claim 1 , characterized in that the alkali compound in washcoat layer A is an oxide claim 1 , carbonate claim 1 , and/or hydroxide of lithium claim 1 , ...

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Номер записи: 34
09-02-2017 дата публикации

PARTICULATE FILTER PROVIDED WITH CATALYST AND METHOD FOR MANUFACTURING SAID FILTER

Номер: US20170036153A1
Автор: Baba Takashi, HARADA Koichiro, TAKIZAWA Tomoya
Принадлежит: MAZDA MOTOR CORPORATION

A catalyst provided for a filter body for combusting PM contains activated aluminas and , active-oxygen-release materials and , catalytic metal , and alkali earth metal . The alkali earth metal is loaded on each of the activated aluminas and , and the active-oxygen-release materials and . A percentage by mass of the alkali earth metal , loaded on the active-oxygen-release materials and , to the active-oxygen-release material is smaller than a percentage by mass of the alkali earth metal , loaded on the activated aluminas and , to the activated alumina. 1. A particulate filter comprising:a filter body configured to collect particulates included in exhaust gas;an exhaust gas pathway wall included in the filter body; anda catalyst provided for the exhaust gas pathway, and configured to combust the particulates, whereinthe catalyst contains activated alumina, an active-oxygen-release material, catalytic metal, and alkali earth metal, the active-oxygen-release material including one, or two or more kinds of oxide taking in oxygen included in the exhaust gas and releasing the oxygen taken in as active oxygen,the alkali earth metal is loaded on each of the activated alumina and the active-oxygen-release material, anda percentage by mass of the alkali earth metal, loaded on the active-oxygen-release material, to the active-oxygen-release material is 1% by mass or smaller, and smaller than a percentage by mass of the alkali earth metal, loaded on the activated alumina, to the activated alumina.2. The particulate filter of claim 1 , whereinthe active-oxygen-release material includes a Ce-containing composite oxide and a Ce-free Zr-based composite oxide,an amount of the alkali earth metal loaded on the activated alumina is greater than a total amount of the alkali earth metal loaded on the Ce-containing composite oxide and the Ce-free Zr-based composite oxide.3. The particulate filter of whereina percentage by mass of the alkali earth metal, loaded on the activated alumina, to ...

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Номер записи: 35
08-02-2018 дата публикации

EXHAUST GAS TREATMENT SYSTEM

Номер: US20180038252A1
Автор: Hochmuth John K., Li Yuejin, Schladt Matthew J., XUE Wen-Mei, YANG Xiaofan
Принадлежит: BASF CORPORATION

Described are exhaust gas treatment systems for treatment of a gasoline engine exhaust gas stream containing NOx, particulate matter, and sulfur. The exhaust gas treatment system comprises: one or more catalytic articles selected from a three-way conversion catalyst (TWC), a lean NOx trap (LNT), and an integrated LNT-TWC; a platinum-containing catalytic article downstream from the one or more catalytic articles; and one or more selective catalytic reduction (SCR) catalytic articles immediately downstream from the platinum-containing catalytic article, the one or more SCR catalytic articles including a molecular sieve. The system stabilizes the SCR catalytic article from poisoning by sulfur. 1. An exhaust gas system for treatment of a gasoline engine exhaust gas stream containing NO , particulate matter , and sulfur , the system comprising:{'sub': 'x', 'at least one catalytic article selected from a three-way conversion (TWC) catalyst, a lean NOtrap (LNT), and an integrated LNT-TWC;'}a platinum-containing catalytic article downstream from the at least one catalytic article; anda selective catalytic reduction (SCR) catalytic article immediately downstream from the platinum-containing catalytic article, the SCR catalytic article including a molecular sieve.2. The exhaust gas system of claim 1 , wherein the at least one catalytic article consists of a TWC catalyst.3. The exhaust gas system of claim 1 , wherein the at least one catalytic article consists of an LNT.4. The exhaust gas system of claim 1 , wherein the at least one catalytic article includes a TWC catalyst and an LNT.5. The exhaust gas system of claim 4 , wherein the LNT and TWC catalyst are integrated on a single substrate.6. The exhaust gas system of claim 1 , wherein the at least one catalytic article and the platinum-containing catalytic article are on a single substrate.7. The exhaust gas system of claim 1 , wherein the platinum-containing catalyst is on a particulate filter.8. The exhaust gas system of ...

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Номер записи: 36
24-02-2022 дата публикации

A method for production of vanadium catalysts

Номер: US20220055018A1
Автор: FENG Yang, Feng Zhao, Jia Di Zhang, LIANG Chen
Принадлежит: BASF Corp

A method for production of vanadium catalysts, including steps of 1) providing a mixture comprising a TiO2-based support and a composite oxide containing vanadium and antimony; 2) preparing a slurry containing the mixture obtained from step 1), and additive comprising at least one species selected from the group consisting of Si, Al, Zr, Ti, W and Mo, and a solvent; and 3) applying the slurry onto a substrate or processing the slurry into shaped bodies. The vanadium catalysts obtained/obtainable from the method, and use thereof for abatement of nitrogen oxides (NOx).

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Номер записи: 37
24-02-2022 дата публикации

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

Номер: US20220055021A1
Автор: Fudong Liu, Ke-Bin LOW, Michel Deeba
Принадлежит: BASF Corp

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.

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Номер записи: 38
06-02-2020 дата публикации

NOx Trap Catalyst Support Material Composition

Номер: US20200038841A1
Автор: Fibikar Sandra, Harmening Thomas, Niemeyer Dirk, Schöneborn Marcos
Принадлежит:

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 ...

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Номер записи: 39
06-02-2020 дата публикации

Composite material

Номер: US20200038850A1
Автор: AMEEN Shahid, Joerg Werner Muench, Juergen Bauer, Ralf Dotzel, Ralitsa PUROVA, Thangaraj Selvam, Wilhelm Schwieger
Принадлежит: Johnson Matthey Catalysts Germany GmbH

A composite material comprises a macroporous silicate-based material at least partially substituted with at least one microporous zeolite, wherein the microporous zeolite is functionalised with either copper, iron or both copper and iron, and wherein the composite material is in the form of particles. The composite material can be obtained using a method comprising the steps of: (i) providing a mixture comprising a silicate-containing scaffold having a macroporous structure, an aluminium source and an organic template; (ii) hydrothermally treating the mixture to form a microporous zeolite-containing structure substantially retaining the macroporous structure of the silicate-containing scaffold; (iii) incorporating copper, iron or both copper and iron into the zeolite. The cate-containing scaffold can be a diatomaceous earth.

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Номер записи: 40
07-02-2019 дата публикации

METHODS FOR MONITORING AND REGENERATING SELECTIVE CATALYTIC REDUCTION FILTER DEVICES

Номер: US20190040783A1
Автор: Li Jianwen, Mital Rahul
Принадлежит:

Methods for monitoring and/or regenerating a selective catalytic reduction particulate filter (SCRF) are provided. The SCRF comprises a porous filter substrate and a catalytic composition capable of reducing NOx applied thereto. Methods include determining a SCRF pressure differential (dP) and determining the SCRF soot loading using a 1st SCRF dP map if the SCRF has not been degreened, or a 2nd SCRF dP map if the SCRF has been degreened. The SCRF has been degreened if one or more of a degreening cumulative time and temperature threshold has been achieved and a filter regeneration count threshold has been achieved. The 1st and 2nd SCRF dP maps correlate SCRF dP and one or more of SCRF temperature, exhaust mass flow, and exhaust volumetric flow to a SCRF soot loading. The method can optionally further include initiating a filter regeneration if the determined SCRF soot loading is above a soot loading threshold. 1. A method for determining soot loading in a selective catalytic reduction particulate filter device (SCRF) utilized by an internal combustion engine (ICE) exhaust gas treatment system , wherein the exhaust gas treatment system includes an ICE configured to communicate exhaust gas to the SCRF , and the SCRF comprises a porous filter substrate and a catalytic composition capable of reducing NOx species applied thereto , the method comprising:determining a SCRF pressure differential (dP); and [{'sup': 'st', 'a 1SCRF dP map if a filter regeneration count threshold is not achieved and a degreening cumulative time and temperature threshold is not achieved; or'}, {'sup': 'nd', 'a 2SCRF dP map if at least one of a filter regeneration count threshold or the degreening cumulative time and temperature threshold is achieved.'}], 'determining a SCRF soot loading using2. The method of claim 1 , wherein SCRF soot loading is determined using the 2SCRF dP map if both the filter regeneration count threshold and the filter regeneration cumulative time and temperature threshold ...

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Номер записи: 41
18-02-2021 дата публикации

INORGANIC OXIDE

Номер: US20210046454A1
Автор: Ando Hiroyuki, KAWAKAMI Yoshitaka
Принадлежит: Sumitomo Chemical Company, Limited

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 ...

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Номер записи: 42
18-02-2021 дата публикации

Exhaust gas purification catalyst

Номер: US20210046457A1
Автор: Hiroki NIHASHI
Принадлежит: Cataler Corp

An exhaust gas purification catalyst including particles of a catalyst metal supported on secondary particles of an inorganic oxide, wherein when scanning transmission electron microscope-energy dispersive X-ray line analysis is performed from a surface of the secondary particles toward a center thereof, a support density of the catalyst metal on a surface side of the secondary particles is greater than the support density of the catalyst metal in a center part of the secondary particles.

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Номер записи: 43
15-02-2018 дата публикации

NOx ADSORBER CATALYST, METHODS AND SYSTEMS

Номер: US20180043335A1
Автор: Grubert Gerd, Hilgendorff Marcus, Li Yuejin, Neubauer Torsten, Punke Alfred
Принадлежит: BASF CORPORATION

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 ...

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Номер записи: 44
03-03-2022 дата публикации

CATALYST FOR EXHAUST GAS PURIFICATION, METHOD FOR PRODUCING SAME, AND EXHAUST GAS PURIFICATION METHOD USING SAME

Номер: US20220062869A1
Автор: KUNO Hirotaka, NAKASHIMA Masashi, OGINO Yuji
Принадлежит: UMICORE SHOKUBAI JAPAN CO., LTD.

An exhaust gas purification catalyst including at least two layers, a lower catalyst layer and upper catalyst layer, on a refractory three-dimensional structure, wherein the lower catalyst layer and upper catalyst layer independently include a precious metal, alumina, and cerium-zirconium composite oxide, and at least a portion of the upper catalyst layer is formed using a manufacturing method including: applying a slurry for forming the upper catalyst layer onto the lower catalyst layer, the slurry containing a pore connecting agent with a combustion decomposition temperature of 150° C. or more to 400° C. or less, a precious metal precursor, alumina, and cerium-zirconium composite oxide, the content ratio of the pore connecting agent being less than 20 mass % of the total solid content when heated to 1000° C.; and holding the workpiece in an oxygen containing gas at a temperature above −150° C. and +50° C. or lower, relative to the combustion decomposition temperature.

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Номер записи: 45
03-03-2022 дата публикации

EXHAUST GAS PURIFICATION DEVICE

Номер: US20220062884A1
Автор: Chinzei Isao, FUJITA Naoto, HOSHINO Sho, Ito Minoru, SHIRAKAWA Shogo, TOJO Takumi
Принадлежит:

An exhaust gas purification device includes a substrate including an upstream end and a downstream end and having a length Ls; a first containing Pd particles, extending between the upstream end and a first position, and being in contact with the substrate; a second containing Rh particles, extending between the downstream end and a second position, and being in contact with the substrate; and a third catalyst layer containing Rh particles, extending between the upstream end and a third position, and being in contact with at least the first catalyst layer, wherein an average of a Rh particle size distribution is from 1.0 to 2.0 nm, and a standard deviation of the Rh particle size distribution is 0.8 nm or less in each of the second catalyst layer and the third catalyst layer.

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Номер записи: 46
03-03-2022 дата публикации

NANOCRYSTAL-SIZED CERIUM-ZIRCONIUM-ALUMINUM OXIDE MATERIAL AND METHOD OF MAKING THE SAME

Номер: US20220064017A1
Автор: Bortun Anatoly, Bortun Mila, Cho Jin, Li Yunkui, Shepard David
Принадлежит:

A nanocrystal-sized cerium-zirconium-aluminum mixed oxide material includes at least 20% by mass zirconium oxide; between 5% to 55% by mass cerium oxide; between 5% to 60% by mass aluminum oxide; and a total of 25% or less by mass of at least one oxide of a rare earth metal selected from the group of lanthanum, neodymium, praseodymium, or yttrium. The nanocrystal-sized cerium-zirconium-aluminum mixed oxide exhibits hierarchically ordered aggregates having a dso particle size less than 1.5 μm, and retains at least 80% of surface area and pore volume after ageing at temperature higher than 1000° C. for at least 6 hours. The nanocrystal-sized cerium-zirconium-aluminum mixed oxide material is prepared using a co-precipitation method followed by milling the dried and calcined oxide material. The nanocrystal-sized cerium-zirconium-aluminum mixed oxide material forms a particulate filter that may be used in an exhaust system arising from a gas or diesel engine

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Номер записи: 47
03-03-2022 дата публикации

EXHAUST GAS PURIFICATION SYSTEM WITH AIR INJECTION

Номер: US20220065149A1
Автор: CHEN CHUN YU, CHEN Shau Lin
Принадлежит:

The present invention relates to an exhaust gas purification system comprising two catalytic sub-systems, wherein the first catalytic sub-system is for conversion of NOx, HC, CO and optionally particulate matter, and the second sub-system is for conversion of CO. The second sub-system locates at the downstream of the first catalytic sub-system. An air injection is positioned between the first catalytic sub-system and second catalytic sub-system.

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Номер записи: 48
13-02-2020 дата публикации

Exhaust gas purifying catalyst

Номер: US20200047119A1
Автор: Daisuke SUGIOKA, Eriko Tanaka, Keigo Hori, Mai Huong Tran, Norihiko Aono, Shu MIYASAKA
Принадлежит: Cataler Corp

This exhaust gas purifying catalyst is provided with a substrate 10 and a catalyst layer 20 formed on a surface of the substrate 10 . The catalyst layer 20 contains zeolite particles 22 that support a metal, and a rare earth element-containing compound 24 that contains a rare earth element. The rare earth element-containing compound 24 is added in such an amount that the molar ratio of the rare earth element relative to Si contained in the zeolite 22 is 0.001 to 0.014 in terms of oxides.

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Номер записи: 49
13-02-2020 дата публикации

TRANSITION METAL-CARRYING ZEOLITE AND PRODUCTION METHOD THEREFOR, AND NITROGEN OXIDE PURIFICATION CATALYST AND METHOD FOR USING SAME

Номер: US20200047168A1
Автор: HOTTA Yuusuke, MATSUO Takeshi, Takewaki Takahiko, TANAKA Manabu
Принадлежит: MITSUBISHI CHEMICAL CORPORATION

This transition metal-loaded zeolite is configured such that an absorption intensity ratio in a specific region of the transition metal-loaded zeolite observed by ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR) and an intensity ratio of a maximum peak in a different temperature range of the transition metal-loaded zeolite measured by ammonia temperature-programmed desorption, respectively fall within specific ranges. 1. A transition metal-loaded zeolite , comprisingzeolite having a structure designated as AEI or AFX according to a code system defined by International Zeolite Association (IZA), and comprising at least a silicon atom and an aluminum atom in a framework structure thereof, anda transition metal M loaded thereon,wherein the transition metal-loaded zeolite satisfies (1) and (2): {'br': None, 'sup': −1', '−1, 'Intensity (32,500 cm)/Intensity (12,500 cm)\u2003\u2003(I) and'}, '(1) a ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR), which is obtained according to expression (I), is less than 0.4;'}{'sub': 3', '3', '200-400', '3', '450-600, '(2) a peak intensity obtained according to ammonia temperature-programmed desorption (NH-TPD) exists in at least each of a range of 200° C. to 400° C. and a range of 450° C. to 600° C. and a ratio of a maximum peak intensity in the range of 200° C. to 400° C. to a maximum peak intensity in the range of 450° C. to 600° C. (NH-TPD/NH-TPD) is 1.0 or more and 2.0 or less.'}2. The transition metal-loaded zeolite according to claim 1 , further satisfying (3):(3) a molar ratio M/Al is 0.1 or more and 0.35 or less.3. The transition metal-loaded zeolite according to claim 1 , wherein the ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR) is less than 0.3.4. The transition metal-loaded zeolite according to claim 1 , wherein the ratio of absorption intensity based on ultraviolet-visible-near infrared spectroscopy (UV-Vis-NIR ...

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Номер записи: 50
13-02-2020 дата публикации

Exhaust gas purification catalyst and exhaust gas purification method using the same

Номер: US20200049041A1
Автор: Hirotaka KUNO, Kazuyoshi Komata, Kenji Ashikari, Masashi Nakashima, Shigekazu MINAMI, Yuji Ogino
Принадлежит: Umicore Shokubai Japan Co Ltd

In order to provide an exhaust gas purification catalyst capable of purifying hydrocarbons, carbon monoxide, and nitrogen oxides in exhaust gas at low temperatures, the exhaust gas purification catalyst according to the present invention includes: a region ( 2 ) containing palladium on a three-dimensional structure ( 1 ), and a first region ( 3 ) and a second region ( 4 ) provided on the region ( 2 ) in order from an inflow side of exhaust gas to an outflow side of exhaust gas. The concentration of neodymium contained in the first region ( 3 ) is higher than the concentration of neodymium contained in the second region ( 4 ).

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Номер записи: 51
13-02-2020 дата публикации

EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFICATION METHOD USING THE SAME

Номер: US20200049042A1
Автор: Ikeda Masanori, IKEGAMI Takahiro, KUNO Hirotaka, Mikita Kosuke, MINAMI Shigekazu, NAKASHIMA Masashi
Принадлежит: UMICORE SHOKUBAI JAPAN CO., LTD.

In order to provide an exhaust gas purification catalyst capable of purifying hydrocarbons, carbon monoxide, and nitrogen oxides in exhaust gas at low temperatures, the exhaust gas purification catalyst according to the present invention includes: a region () containing palladium and yttrium on a three-dimensional structure (), and a first region () and a second region () provided on the region () in order from an inflow side of exhaust gas to an outflow side of exhaust gas. The concentration of yttrium contained in the first region () and/or the second region () is higher than the concentration of yttrium contained in the region (). 1. An exhaust gas purification catalyst comprising:a region containing palladium and yttrium, the region being provided on a three-dimensional structure; anda first region and a second region being provided on the region containing palladium and yttrium in order from an inflow side of exhaust gas to an outflow side of exhaust gas, whereinthe concentration of yttrium contained in either the first region and/or the second region is higher than the concentration of yttrium contained in the region containing palladium and yttrium.2. The exhaust gas purification catalyst according to claim 1 , wherein the concentration of yttrium contained in the second region is from 2 mass % to 15 mass % in terms of YO claim 1 , and{'sub': 2', '3, 'the concentration of yttrium contained in the region containing palladium and yttrium is from 0.01 mass % to 0.9 mass % in terms of YO.'}3. The exhaust gas purification catalyst according to or claim 1 , wherein the amount of yttrium contained in the second region is larger than the amount of yttrium contained in the first region.4. The exhaust gas purification catalyst according to any one of to claim 1 , wherein the amount of yttrium contained in the second region is from 2.1 g/L to 10 g/L in terms of YOrelative to 1 liter of the three-dimensional structure claim 1 , and{'sub': 2', '3, 'the amount of yttrium ...

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Номер записи: 52
10-03-2022 дата публикации

TWC CATALYSTS CONTAINING HIGH DOPANT SUPPORT

Номер: US20220072515A1
Автор: JING Yuan, NAGAOKA Shuhei, SHIMIZU Ken-ichi, TOYAO Takashi
Принадлежит:

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate; and a first catalytic region on the substrate; wherein the first catalytic region comprises a first PGM component and a first inorganic oxide, wherein the IR intensity ratio of bridge CO to atop CO on the PGM component is less than 3:1 under standard CO adsorption procedure. 1. A catalyst article for treating exhaust gas comprising:a substrate;a first catalytic region on the substrate, wherein the first catalytic region comprises a first PGM component, and a first inorganic oxide; anda second catalytic region on the substrate, wherein the second catalytic region comprises a second PGM component, and a second inorganic oxide;wherein at least one of the first inorganic oxide and the second inorganic oxide is doped with 10-30% dopant.2. The catalyst article of claim 1 , wherein the dopant for the first inorganic oxide and/or the second inorganic oxide is each independently selected from the group consisting of La claim 1 , Sr claim 1 , Si claim 1 , Ba claim 1 , Y claim 1 , Pr claim 1 , Nd claim 1 , and Ce.3. The catalyst article of claim 1 , wherein the first inorganic oxide is alumina.4. The catalyst article of claim 3 , wherein the dopant for the first inorganic oxide is La.5. The catalyst article of claim 1 , wherein the first PGM component is Pd.6. The catalyst article of claim 1 , wherein the IR intensity ratio of bridge CO to atop CO on the first PGM component is less than 3:1 under standard CO adsorption procedure.7. The catalyst article of claim 1 , wherein the second inorganic oxide is alumina.8. The catalyst article of claim 1 , wherein the dopant for the second inorganic oxide is La.9. The catalyst article of claim 1 , wherein the second PGM component is Rh.10. The catalyst article of claim 1 , wherein the IR intensity ratio of gem-dicarbonyl CO to atop CO on the second PGM ...

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Номер записи: 53
01-03-2018 дата публикации

OXIDATION CATALYST FOR A DIESEL ENGINE EXHAUST

Номер: US20180056239A1
Автор: Feaviour Mark Robert, Thompsett David
Принадлежит:

An oxidation catalyst is described for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate, wherein the catalytic region comprises a catalytic material comprising: antimony (Sb) or an oxide thereof; a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); and a support material, which is a refractory oxide; wherein the platinum group metal (PGM) and the antimony (Sb) or an oxide thereof is each supported on the support material. 1. An oxidation catalyst for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate , wherein the catalytic region comprises a catalytic material comprising:antimony (Sb) or an oxide thereof;a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); anda support material, which is a refractory oxide;wherein the platinum group metal (PGM) and the antimony (Sb) or an oxide thereof is each supported on the support material.2. An oxidation catalyst according to claim 1 , wherein the refractory oxide is a particulate refractory oxide claim 1 , and the antimony or an oxide thereof is dispersed over a surface of the particulate refractory oxide.3. An oxidation catalyst according to claim 1 , wherein the refractory oxide comprises alumina claim 1 , silica or a mixed or composite oxide of silica and alumina claim 1 , preferably the refractory oxide is a mixed or composite oxide of silica-alumina comprising 0.5 to 45% by weight of silica.4. An oxidation catalyst according to claim 1 , wherein the refractory oxide comprises alumina doped with silica.5. An oxidation catalyst according to claim 1 , wherein the platinum group metal (PGM) is platinum (Pt).6. An oxidation catalyst according to claim 1 , wherein the platinum group metal (PGM) is palladium (Pd).7. An oxidation catalyst ...

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Номер записи: 54
01-03-2018 дата публикации

CATALYTIC CONVERTERS WITH AGE-SUPPRESSING CATALYSTS

Номер: US20180056276A1
Автор: Day Ryan J., Qi Gongshin, Xiao Xingcheng, Yang Ming
Принадлежит:

A catalytic converter includes a catalyst. The catalyst includes a support, platinum group metal (PGM) particles dispersed on the support, and metal oxide nanoparticles formed on the support. The metal oxide nanoparticles are dispersed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles. 1. A catalytic converter , comprising: a support;', 'platinum group metal (PGM) particles dispersed on the support; and', 'metal oxide nanoparticles formed on the support, the metal oxide nanoparticles dispersed between a first set of the PGM particles and a second set of the PGM particles to suppress aging of the PGM particles., 'a catalyst including2. The catalytic converter as defined in claim 1 , wherein the support and the metal oxide nanoparticles are independently selected from the group consisting of AlO claim 1 , CeO claim 1 , ZrO claim 1 , CeO—ZrO claim 1 , SiO claim 1 , TiO claim 1 , MgO claim 1 , ZnO claim 1 , BaO claim 1 , KO claim 1 , NaO claim 1 , CaO claim 1 , and combinations thereof.3. The catalytic converter as defined in wherein the support is pre-sintered.4. The catalytic converter as defined in wherein each of the first set of the PGM particles and the second set of the PGM particles has at least one dimension up to 10 nm.5. The catalytic converter as defined in wherein the metal oxide nanoparticles are stacked to a height ranging from about 0.05× to about 10× claim 1 , where X is a dimension of at least one of the first and second sets of the PGM particles.6. The catalytic converter as defined in wherein the metal oxide nanoparticles make up from about 5 wt % to about 20 wt % of the catalyst.7. The catalytic converter as defined in wherein the metal oxide nanoparticles do not extend onto any of the PGM particles.8. The catalytic converter as defined in wherein the metal oxide nanoparticles are formed around each of the first and second sets of the PGM particles.9. The catalytic converter as ...

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Номер записи: 55
01-03-2018 дата публикации

HYDROCARBON AND NITROGEN OXIDES CATALYST TRAP

Номер: US20180056282A1
Автор: Cavataio Giovanni, Guo Gang, Hepburn Jeffrey Scott, Ura Justin Anthony, XU LIFENG
Принадлежит:

A hydrocarbon and NOx catalyst trap includes a three-way catalyst, and a zeolite layer adjacent to the three-way catalyst and including alumina and silica arranged to form a repeating skeletal frame that defines cavities including active metal active sites for hydrocarbon and NOx trapping such that individual atoms of the active metal are bound to the frame within the cavities via oxygen atoms. 1. A hydrocarbon and NOx catalyst trap comprising:a three-way catalyst; anda zeolite layer adjacent to the three-way catalyst and including alumina and silica arranged to form a repeating skeletal frame that defines cavities including active metal active sites for hydrocarbon and NOx trapping such that individual atoms of the active metal are bound to the frame within the cavities via oxygen atoms.2. The trap of claim 1 , wherein the zeolite layer comprises BEA claim 1 , ZSM5 claim 1 , Y claim 1 , chabazite claim 1 , or a combination thereof claim 1 , with silica to alumina ratio of 10 to 100.3. The trap of claim 1 , wherein the zeolite layer claim 1 , with the active metal loading of about 0.4 wt. % active metal claim 1 , is configured to store up to about 20.5×10mole of ethylene per 0.5 g thereof.4. The trap of claim 1 , wherein the zeolite layer claim 1 , with the active metal loading of about 0.4 wt. % active metal claim 1 , is configured to store up to 7.7×10mole of NOx per 0.5 g thereof.5. The trap of claim 1 , wherein the active metal is palladium claim 1 , platinum claim 1 , ruthenium claim 1 , rhodium claim 1 , or a combination thereof.6. The trap of claim 1 , wherein the zeolite layer is configured to hold trapped NOx up to a temperature of about 250° C.7. The trap of claim 1 , wherein the active metal loading is about 0.1 to 1 wt. %.8. The trap of claim 1 , wherein the active metal is ion-exchanged.9. The trap of claim 1 , wherein the active metal is incorporated via a zeolite in-situ active metal powder addition.10. A method of producing a hydrocarbon and NOx ...

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Номер записи: 56
21-02-2019 дата публикации

DENITRATION CATALYST AND METHOD FOR PRODUCING THE SAME

Номер: US20190054448A1
Автор: HARUTA Masatake, HIKINO Kenji, KIYONAGA Eiji, MINO Makoto, MORITA Keiichiro, Murayama Toru
Принадлежит:

There is provided a catalyst that exhibits a high denitration efficiency at a relatively low temperature and does not cause oxidation of SOin a selective catalytic reduction reaction that uses ammonia as a reducing agent. A denitration catalyst is obtained by coating a substrate with a catalyst component. The catalyst component contains 43 wt % or more of vanadium pentoxide and has a BET specific surface area of 30 m/g or more. The denitration catalyst is used for denitration at 200° C. or lower. 1. A denitration catalyst obtained by coating a substrate with a catalyst component , wherein the catalyst component contains 43 wt % or more of vanadium pentoxide and has a BET specific surface area of 30 m2/g or more , and the denitration catalyst is used for denitration at 200° C. or lower.2. The denitration catalyst according to claim 1 , wherein in the catalyst component claim 1 , an amount of NH3 desorbed by NH3-TPD (TPD: temperature programed desorption) is 10.0 μmol/g or more.3. A method for producing the denitration catalyst according to claim 1 , the method comprising a step of impregnating the substrate with a chelate compound solution in which vanadium pentoxide is dissolved and then performing firing.4. A method for producing the denitration catalyst according to claim 1 , the method comprising a step of spraying a chelate compound solution in which vanadium pentoxide is dissolved onto the substrate and then performing firing. The present invention relates to a denitration catalyst and a method for producing the denitration catalyst. More specifically, the present invention relates to a denitration catalyst used when exhaust gas generated through fuel combustion is cleaned up and a method for producing the denitration catalyst.One of pollutants emitted to the air through fuel combustion is nitrogen oxide (NO, NO, NO, NO, NO, NO, or NO). Nitrogen oxide causes, for example, acid rain, ozone depletion, and photochemical smog and seriously affects the environment ...

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Номер записи: 57
04-03-2021 дата публикации

EXHAUST GAS PURIFICATION CATALYST BODY

Номер: US20210060487A1
Автор: MIURA Taku, Onoe Ryota, TODA Yosuke
Принадлежит: CATALER CORPORATION

Provided is an exhaust gas purification catalyst body that can improve exhaust gas purification performance while maintaining favorable PM collection performance. The exhaust gas purification catalyst body includes a base of a wall flow structure having an inlet side cell, an outlet side cell, and porous partition wall, and a catalyst layer that is formed in the partition wall that is in contact with the inlet side cell or the outlet side cell. The catalyst layer is formed in a region of at least 50% of the thickness of the partition wall from a surface of the partition wall, and held on the surface of internal pores in the partition wall in the region. 1. An exhaust gas purification catalyst body which is disposed in an exhaust passage of an internal combustion engine and purifies exhaust gas discharged from the internal combustion engine , comprising:a base of a wall flow structure having an inlet side cell in which an end on the exhaust gas inflow side is open, an outlet side cell which is adjacent to the inlet side cell and in which an end on the exhaust gas outflow side is open, and a porous partition wall that partitions the inlet side cell and the outlet side cell; anda catalyst layer that is formed in the partition wall, whereinthe catalyst layer is formed in a region of at least 50% of the thickness of the partition wall from a surface of the partition wall that faces at least one cell of the inlet side cell and the outlet side cell, and held on the surface of internal pores in the partition wall in the region, and, [{'br': None, 'A Подробнее

Номер записи: 58
01-03-2018 дата публикации

Reduced Sulfation Impact on Cu-SCRs

Номер: US20180058293A1
Автор: Marsh Per, NEWMAN Andrew, Smith Christopher
Принадлежит:

Systems and methods related to an exhaust gas purification system comprising: an injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, positioned downstream of an engine; a Cu-SCR catalyst positioned downstream of the injector, wherein no oxidation catalysts exist between the Cu-SCR catalyst and the engine; wherein the exhaust gas entering the Cu-SCR catalyst comprises an NH/NOx ratio of less than 1.2. 1. An exhaust gas purification system comprising:a. an injector for injecting ammonia or a compound decomposable to ammonia into the exhaust gas, positioned downstream of an engine; 'wherein the Cu-SCR catalyst comprises Cu exchanged SAPO-34, Cu exchanged CHA zeolite, Cu exchanged AEI zeolites, or combinations thereof.', 'b. a Cu-SCR catalyst positioned downstream of the urea/ammonia injector, wherein no oxidation catalysts exist between the Cu-SCR catalyst and the engine;'}2. The exhaust gas purification system of claim 1 , further comprising a downstream system comprising one or more of a reductant injector claim 1 , an SCR catalyst claim 1 , an SCRF catalyst claim 1 , a lean NOx trap claim 1 , an ASC claim 1 , a filter claim 1 , an oxidation catalyst claim 1 , SCRT and combinations thereof.3. The exhaust gas purification system of claim 2 , wherein the downstream system comprises two or more SCR catalysts.4. The exhaust gas purification system of claim 1 , further comprising an additional SCR catalyst upstream of the Cu-SCR catalyst.5. The exhaust gas purification system of claim 1 , wherein the exhaust gas entering the Cu-SCR catalyst comprises an NH/NOx ratio of less than 1.2.6. The exhaust gas purification system of claim 1 , wherein the exhaust gas entering the Cu-SCR catalyst comprises an NH/NOx ratio of about 0.4 to about 1.1.7. A method of purifying exhaust gas claim 1 , comprising:a. adding ammonia or a compound decomposable into ammonia into the exhaust gas by an injector located downstream of an engine; {'sub': '3', ' ...

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Номер записи: 59
05-03-2015 дата публикации

Co slip catalyst and method of using

Номер: US20150064085A1
Автор: Erich Conlan Weigert, Hai-Ying Chen, Jeffery Scott Rieck, Julian Peter Cox, Shadab Sharif Mulla, Todd Howard Ballinger
Принадлежит: JOHNSON MATTHEY PLC

A CO slip catalyst, for treating an exhaust gas from a lean burn internal combustion engine, is disclosed. The CO slip catalyst comprises palladium and a ceria-containing material. The invention also includes a method for oxidizing excess CO in an exhaust gas, wherein the excess CO results from the periodic contact of an upstream catalyst under rich exhaust conditions. The method comprises contacting the excess CO in the exhaust gas with a CO slip catalyst at a temperature in the range of 100 to 700° C.

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Номер записи: 60
28-02-2019 дата публикации

Zoned configuration for oxidation catalyst combinations

Номер: US20190060833A1
Автор: Jeffrey B. Hoke
Принадлежит: BASF Corp

The present disclosure generally provides an emission treatment system for at least partial conversion of gaseous CO emissions. The exhaust gas treatment system includes various components such as a first catalyst component selected from a LNT or an oxidation catalyst for the abatement of HC and CO, which contains a catalyst composition such as a platinum group metal component impregnated into a refractory oxide material. Another component in the exhaust gas treatment system is an SCR catalyst for the abatement of NOx, which contains a catalyst composition such as a metal ion-exchanged molecular sieve and can be optionally absent when the first catalyst component is an LNT. A second oxidation catalyst for further abatement of CO is also part of the emission treatment system and includes a third catalyst composition selected from a platinum group metal component, a base metal oxide component, or combinations thereof disposed onto a carrier substrate.

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Номер записи: 61
27-02-2020 дата публикации

Low-silica chabazite zeolites with high acidity

Номер: US20200061594A1
Автор: Anton Petushkov, Bjorn Moden, Hong-Xin Li, Lifeng Wang
Принадлежит: PQ Corp

A microporous crystalline material having a molar silica to alumina ratio (SAR) ranging from 10 to 15 and a fraction of Al in the zeolite framework of 0.63 or greater is disclosed. A method of selective catalytic reduction of nitrogen oxides in exhaust gas that comprises contacting exhaust gases, typically in the presence of ammonia, urea, an ammonia generating compound, or a hydrocarbon compound, with an article comprising the disclosed microporous crystalline is also disclosed. Further, a method of making the disclosed microporous crystalline material is disclosed.

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Номер записи: 62
08-03-2018 дата публикации

Diesel oxidation catalyst with nox adsorber activity

Номер: US20180065083A1
Автор: Andrew Chiffey, François Moreau, Matthew O'Brien, Yannick BIDAL
Принадлежит: JOHNSON MATTHEY PLC

An oxidation catalyst for treating an exhaust gas from a diesel engine and an exhaust system comprising the oxidation catalyst are described. The oxidation catalyst comprises a washcoat region disposed on a substrate, wherein the washcoat region comprises: palladium (Pd), gold (Au) and a support material, wherein the palladium (Pd) and gold (Au) are supported on the support material; and a molecular sieve catalyst, wherein the molecular sieve catalyst comprises a noble metal and a molecular sieve.

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Номер записи: 63
08-03-2018 дата публикации

DIESEL OXIDATION CATALYST AND EXHAUST SYSTEM

Номер: US20180065084A1
Автор: CHIFFEY ANDREW FRANCIS, GOODWIN John Benjamin, LEELAND James, Moreau François
Принадлежит:

An oxidation catalyst for treating an exhaust gas from a diesel engine and an exhaust system comprising the oxidation catalyst are described. The oxidation catalyst comprises: a first washcoat region for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material; a second washcoat region for oxidising nitric oxide (NO), wherein the second washcoat region comprises platinum (Pt), manganese (Mn) and a second support material; and a substrate having an inlet end and an outlet end; wherein the second washcoat region is arranged to contact the exhaust gas at the outlet end of the substrate and after contact of the exhaust gas with the first washcoat region. 1. An exhaust system for a diesel engine , which comprises an oxidation catalyst for treating an exhaust gas from the diesel engine and an emissions control device , wherein the oxidation catalyst comprises:a first washcoat zone for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material;a second washcoat zone for oxidising nitric oxide (NO), wherein the second washcoat zone comprises platinum (Pt) and manganese (Mn) disposed or supported on a second support material, wherein the second support material comprises a refractory metal oxide; anda substrate, andwherein the second washcoat zone is disposed at an outlet end of the substrate, and the first washcoat zone disposed at an inlet end of the substrate.2. An exhaust system according to claim 1 , wherein the second washcoat zone comprises platinum (Pt) as the only platinum group metal.3. An exhaust system according to claim 1 , wherein the second support material comprises a refractory metal oxide selected from the group consisting of alumina claim 1 , silica claim 1 , titania claim 1 , zirconia claim 1 , ceria and a mixed or composite oxide of two or more ...

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Номер записи: 64
08-03-2018 дата публикации

DIESEL OXIDATION CATALYST AND EXHAUST SYSTEM

Номер: US20180065085A1
Автор: CHIFFEY ANDREW FRANCIS, GOODWIN John Benjamin, LEELAND James, Moreau François
Принадлежит:

An oxidation catalyst for treating an exhaust gas from a diesel engine and an exhaust system comprising the oxidation catalyst are described. The oxidation catalyst comprises: a first washcoat region for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material; a second washcoat region for oxidising nitric oxide (NO), wherein the second washcoat region comprises platinum (Pt), manganese (Mn) and a second support material; and a substrate having an inlet end and an outlet end; wherein the second washcoat region is arranged to contact the exhaust gas at the outlet end of the substrate and after contact of the exhaust gas with the first washcoat region. 1. An oxidation catalyst for treating an exhaust gas from a diesel engine , which comprises:a first washcoat layer for oxidising carbon monoxide (CO) and hydrocarbons (HCs), wherein the first washcoat layer comprises a first platinum group metal (PGM) and a first support material;a second washcoat layer for oxidising nitric oxide (NO), wherein the second washcoat layer comprises platinum (Pt) and manganese (Mn) disposed or supported on a second support material, wherein the second support material comprises a refractory metal oxide; anda substrate having an inlet end and an outlet end, andwherein the second washcoat layer is disposed on the first washcoat layer.2. An oxidation catalyst according to claim 1 , wherein the second washcoat layer comprises platinum (Pt) as the only platinum group metal.3. An oxidation catalyst according to claim 1 , wherein the second support material comprises a refractory metal oxide selected from the group consisting of alumina claim 1 , silica claim 1 , titania claim 1 , zirconia claim 1 , ceria and a mixed or composite oxide of two or more thereof.4. An oxidation catalyst according to claim 3 , wherein the second support material comprises alumina doped with silica.5. An oxidation ...

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Номер записи: 65
08-03-2018 дата публикации

Scr catalyst

Номер: US20180065087A1
Автор: Tomoyuki Mizuno
Принадлежит: Toyota Motor Corp

A highly practical SCR catalyst excellent in NO x purification performance is provided. The SCR catalyst includes a blend of an aluminosilicate molecular sieve that has supported thereon copper as an extra-framework metal and that has a CHA framework, and a silicoaluminophosphate molecular sieve that has a CHA framework, and is adapted to perform selective catalytic reduction of NO x . In the SCR catalyst, the silicoaluminophosphate molecular sieve and the aluminosilicate molecular sieve contain silicoaluminophosphate and aluminosilicate, respectively, in a molar ratio of silicoaluminophosphate:aluminosilicate of 0.1:1.0 to 0.4:1.0.

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Номер записи: 66
28-02-2019 дата публикации

EXHAUST SYSTEM WITH A MODIFIED LEAN NOx TRAP

Номер: US20190063287A1
Автор: SWALLOW DANIEL
Принадлежит:

An exhaust system for treating an exhaust gas from an internal combustion engine is disclosed. The system comprises a modified lean NOtrap (LNT), a urea injection system, and an ammonia-selective catalytic reduction (NH-SCR) catalyst. The modified LNT comprises platinum, palladium, barium, and a ceria-containing material, and has a platinum:palladium molar ratio of at least 3:1. The modified LNT stores NOat temperatures below about 200° C. and releases the stored NOat temperatures above about 200° C. The urea injection system injects urea at temperatures above about 180° C. 1. An exhaust system for treating an exhaust gas from an internal combustion engine , comprising:{'sub': 'x', '(a) a lean NOtrap (LNT), wherein the LNT comprises platinum, palladium, barium, and a ceria-containing material and the LNT has a platinum:palladium molar ratio of at least 3:1;'}(b) a urea injection system; and{'sub': '3', '(c) an ammonia-selective catalytic reduction (NH-SCR) catalyst,'}{'sub': '3', 'wherein there is no intervening catalysts between the LNT and the NH-SCR catalyst.'}2. (canceled)3. The exhaust system of wherein the LNT has a platinum:palladium molar ratio of at least 4:1.4. The exhaust system of wherein the LNT has a barium loading of greater than 150 g/ft.5. The method of wherein the LNT has a barium loading of greater than 400 g/ft.6. The exhaust system of wherein the NH-SCR catalyst is selected from the group consisting of a vanadia-titania catalyst claim 1 , a vanadia-tungsta-titania catalyst claim 1 , and a metal/zeolite.7. The exhaust system of wherein the metal/zeolite comprises a metal selected from the group consisting of iron or copper and a zeolite selected from the group consisting of a beta zeolite claim 6 , a faujasite claim 6 , an L-zeolite claim 6 , a ZSM zeolite claim 6 , an SSZ-zeolite claim 6 , a ferrierite claim 6 , a mordenite claim 6 , a chabazite claim 6 , an offretite claim 6 , an erionite claim 6 , a clinoptilolite claim 6 , a silicalite claim ...

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Номер записи: 67
09-03-2017 дата публикации

CATALYZED SCR FILTER AND EMISSION TREATMENT SYSTEM

Номер: US20170065967A1
Автор: Dettling Joseph C., Patchett Joseph A., Przybylski Elizabeth A.
Принадлежит:

Provided is a catalyst article for simultaneously remediating the nitrogen oxides (NOx), particulate matter, and gaseous hydrocarbons present in diesel engine exhaust streams. The catalyst article has a soot filter coated with a material effective in the Selective Catalytic Reduction (SCR) of NOx by a reductant, e.g., ammonia. 127-. (canceled)28. A method for disposing a selective catalytic reduction (SCR) catalyst composition on a wall flow monolith , wherein the wall flow monolith has a plurality of longitudinally extending passages formed by longitudinally extending walls bounding and defining said passages , wherein the passages comprise inlet passages having an open inlet end and a closed outlet end , and outlet passages having a closed inlet end and an open outlet end , the method comprising:receiving an aqueous slurry comprising the SCR catalyst composition, the SCR catalyst composition comprising a zeolite and a base metal component;immersing the wall flow monolith in the aqueous slurry from a first direction to deposit the SCR catalyst composition on the inlet passages;removing excess aqueous slurry from the inlet passages;immersing the wall flow monolith in the aqueous slurry from a second direction, opposite the first direction, to deposit the SCR catalyst composition on the outlet passages and form a coated wall flow monolith;removing excess aqueous slurry from the outlet passages; and{'sup': '3', 'drying and calcining the coated wall flow monolith to form an integrated soot filter and SCR catalyst, wherein the SCR catalyst composition is present on the coated wall flow monolith at a concentration of at least 1.3 g/in.'}29. The method of claim 28 , wherein the SCR catalyst composition permeates the walls.30. The method of claim 28 , wherein the SCR catalyst composition is present on the coated wall flow monolith at a concentration of 1.6 to 2.4 g/in.31. The method of claim 28 , wherein the calcining step comprises calcining at a temperature in the range ...

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Номер записи: 68
11-03-2021 дата публикации

Single-layer 3-way catalytic converter

Номер: US20210069678A1
Автор: Jan Schoenhaber, Joerg-Michael Richter, Martin Roesch
Принадлежит: Umicore AG and Co KG

The invention relates to a catalytic converter for removing carbon monoxide, hydrocarbons and nitrogen oxides from the exhaust gas of internal combustion engines operated with stoichiometric air-fuel mixture, which catalytic converter comprises a substrate of the length L and a catalytic coating, characterized in that the coating is located on the walls of the substrate and extends, proceeding from one end of the substrate, over a length corresponding to at least 50% of L and comprises active aluminum oxide, two cerium/zirconium/rare-earth-metal mixed oxides different from each other, and at least one platinum group metal.

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Номер записи: 69
11-03-2021 дата публикации

CATALYST COMPRISING CERIA-ZIRCONIA-OXYGEN STORAGE MATERIAL AND PROCESS FOR ITS PRODUCTION

Номер: US20210069680A1
Автор: Bortun Anatoly, Bortun Mila, Cho Jin, Lachapelle Jeffery, Li Yunkui, Shepard David, Wu Wei
Принадлежит:

An oxygen storage material (OSM) that exhibits enhanced redox properties, developed mesoporosity, and a resistance to sintering. The oxygen storage material (OSM) has a high oxygen storage capacity (i.e., OSC>1.5 mmol H/g) and enhanced reducibility (i.e., bimodal TPR-Hprofile with two Tin the temperature range from 150° C. to 550° C.). The OSM is suitable for use as a catalyst and a catalyst support. The method of making the oxygen storage material comprises the preparation of a solution containing zirconium, cerium, rare earth and transition metal salts, followed by the co-precipitation of all constituent metal hydroxides with a base. 1. An Oxygen Storage Material (OSM) consisting of oxides of zirconium , cerium , at least one rare earth metal other than cerium , and at least one transition metal;wherein the OSM has a zirconium oxide content that is not less than 30% by weight and transition metal oxide content not higher than 8% by weight relative to the overall weight of the OSM;{'sub': 2', '2, 'wherein the OSM exhibits 100% CeO2 reducibility and an oxygen storage capacity (OSC) after ageing at 1100° C. for 4 hours that is at least 1.5 mmol H/g with bimodal TPR-Hprofile.'}2. The Oxygen Storage Material according to claim 1 , wherein the OSM has zirconium oxide content from 30% to 80% by weight relative to the overall weight of the OSM.3. The Oxygen Storage Material according to claim 1 , wherein the OSM has cerium oxide content from 5% to 50% by weight relative to the overall weight of the OSM.4. The Oxygen Storage Material according to claim 1 , wherein the rare earth metals are selected from the group lanthanum claim 1 , neodymium claim 1 , praseodymium claim 1 , yttrium or combination of thereof.5. The Oxygen Storage Material according to claim 1 , wherein the rare earth metal oxides content is from 0% up to 15% by weight relative to the overall weight of the OSM.6. The Oxygen Storage Material according to claim 1 , wherein the transition metals are selected ...

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Номер записи: 70
11-03-2021 дата публикации

CATALYTIC ARTICLE AND EXHAUST GAS TREATMENT SYSTEMS

Номер: US20210069688A1
Автор: BEARD Kevin, DORNER Robert, Hallstrom Kevin A., HUENNEKES Edgar Viktor, KALWEI Martin, Patchett Joseph A., Voss Kenneth E., Wille Ansgar
Принадлежит: BASF CORPORATION

The present invention relates to a catalytic article comprising a substrate having a catalyst composition disposed thereon, wherein the catalyst composition comprises a platinum group metal impregnated onto a porous support and a selective catalytic reduction catalyst, wherein the catalyst composition is substantially free of platinum; and wherein the catalytic article is effective in the abatement of nitrogen oxides (NOx) and hydrocarbons (HCs). The present invention further relates to exhaust gas treatment systems for treating an exhaust gas stream exiting a diesel engine. 1. 1.A catalytic article comprising:a substrate having a catalyst composition disposed thereon, wherein the catalyst composition comprises a platinum group metal impregnated onto a porous support and a selective catalytic reduction catalyst;wherein the catalyst composition is substantially free of platinum; and{'sub': 'x', 'wherein the catalytic article is effective in the abatement of nitrogen oxides (NO) and hydrocarbons (HCs).'}2. The catalytic article of claim 1 , wherein the selective catalytic reduction catalyst comprises a mixed metal oxide component claim 1 , wherein the mixed metal oxide component is selected from FeTiO claim 1 , FeAlO claim 1 , MgTiO claim 1 , MgAlO claim 1 , MnO/TiO claim 1 , CuTiO claim 1 , CeZrO claim 1 , TiZrO claim 1 , VO/TiO claim 1 , and mixtures thereof.3. The catalytic article of claim 1 , wherein the platinum group metal impregnated onto a porous support is palladium impregnated onto zirconia and the selective catalytic reduction catalyst comprises one or more of a mixed metal oxide and a zeolite comprising one or more of Cu and Fe.4. The catalytic article of claim 3 , wherein the selective catalytic reduction catalyst comprises a zeolite comprising Cu claim 3 , preferably a zeolite having a framework structure type CHA.5. The catalytic article of claim 1 , wherein the catalyst composition comprises a first layer and a second layer claim 1 , wherein the first ...

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Номер записи: 71
11-03-2021 дата публикации

Nox-trapping catalyst having non-platinum-group-metal nox-trapping layer

Номер: US20210069690A1
Автор: Jin-Woo Song, Narayana Rao Komateedi
Принадлежит: Heesung Catalysts Corp

Disclosed is a NOx-trapping catalyst having a non-platinum-group-metal NOx-trapping layer, which contains a transition metal, particularly manganese, able to maintain NOx-trapping performance while decreasing the amount of expensive platinum-group metal.

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Номер записи: 72
11-03-2021 дата публикации

ULTRASOUND-ASSISTED METHOD FOR PRODUCING AN SCR CATALYTIC CONVERTER

Номер: US20210069691A1
Автор: Barth Benjamin, FOERSTER Martin, SCHONERT Morten
Принадлежит: UMICORE AG & CO. KG

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results in a smaller particle size of the catalytically active material used. 1. Method for producing a catalytic converter containing zeolites or zeotypes for the aftertreatment of exhaust gases of a car engine ,characterized in thatprior to coating onto and/or into a support, the zeolite or zeotype is treated by means of ultrasound in such a way that the particle size thereof is largely reduced to less than 20 μm (d50).2. Method according to claim 1 ,characterized in thatthe zeolites or zeotypes are those derived from structure types selected from the group consisting of the CHA, LEV, AEI, AFX, AFI, or KFI framework, or a mixture thereof.3. Method according to claim 1 ,characterized in thatthe zeolite or zeotype is exchanged with iron and/or copper ions.4. Method according to claim 1 ,characterized in thatthe coating comprises a binder selected from the group consisting of aluminum oxide, titanium dioxide, zirconium dioxide, silicon dioxide, or mixtures thereof.5. Method according to claim 1 ,characterized in thatthe support is a wall-flow filter.6. Method according to claim 1 ,characterized in thatthe particle size (d99) is lowered to below 7 μm.7. Method according to claim 1 ,characterized in thatthe ultrasound is used with an amplitude of 5 to 100 μm.8. Method according to claim 1 ,characterized in thatthe ultrasound has a frequency of 5 to 30 kHz.9. Method according to claim 1 ,characterized in thatthe ultrasound has a power of 500 to 50000 watts.10. Method according to claim 1 ,characterized in thatthe coating suspension is supplied to a pre-drying step after the coating of the support.11. Catalytic converter for the aftertreatment of exhaust gases of a car engine claim 1 , produced according to .12. Catalytic converter according to claim 11 , ...

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Номер записи: 73
27-02-2020 дата публикации

DEF DOSING USING MULTIPLE DOSING LOCATIONS WHILE MAINTAINING HIGH PASSIVE SOOT OXIDATION

Номер: US20200063625A1
Автор: Adelman Bradley Jay, Khanna Umang, Singh Navtej
Принадлежит:

Diesel Exhaust Fluid is metered into an engine exhaust gas aftertreatment system having a close coupled SCR catalyst and a main SCR catalyst. The DEF is injected into two injector locations, one upstream of the close coupled SCR catalyst and another upstream of the main SCR catalyst, the quantity of DEF in each injector being based on primarily the temperature at the main SCR catalyst and the mass flow of the NOx through the aftertreatment system. This method of injection enables a relatively better fuel economy outcome while meeting the regulated tailpipe NOemission levels and the NO formation limits. 2. The internal combustion engine of wherein a quantity of DEF to be injected through the first injector is additionally based on temperature of the diesel particulate filter.3. The internal combustion engine of where in the first injector is upstream of the close coupled SCR catalyst and the second injector is upstream of the main SCR catalyst and downstream of the diesel particulate filter.4. The internal combustion engine of wherein the close coupled SCR is a vanadium-based formulation.5. The internal combustion engine of wherein the main SCR is a Cu Zeolite formulation.6. The internal combustion engine of wherein temperature of the main SCR is measured using a temperature probe in the main SCR and the mass flow of the NOx is measured using a flow sensor placed in the exhaust manifold.7. A control system of an internal combustion engine claim 1 , the control system comprising:a controller;a first data source providing data defining a first value of a main SCR temperature;a second data source providing a mass flow of NOx;a first pre-determined map determining a desired total DEF dosing quantity based on the main SCR temperature and the mass flow of NOx;a second pre-determined map determining a desired first fraction of the desired total DEF dosing quantity through a first injector; whereinthe controller calculates DEF dosing quantity through the first injector based ...

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Номер записи: 74
27-02-2020 дата публикации

INTEGRATED SCR CATALYST AND LNT FOR NOX ABATEMENT

Номер: US20200063628A1
Автор: Shah Sandip
Принадлежит: BASF CORPORATION

Certain catalytic articles, systems or methods provide for excellent NOx conversion and are especially suitable for low temperature NOx conversion. The articles, systems and methods are suitable for instance for the treatment of exhaust gas of diesel engines. Certain articles or systems contain an upstream SCR composition and a downstream LNT composition. The substrate(s) may advantageously be electrically heated. 1. An exhaust gas treatment system comprisinga SCR catalyst composition; anda LNT composition,wherein the LNT article is in fluid communication with and downstream of the SCR catalyst composition.2. The exhaust gas treatment system of claim 1 , wherein the SCR catalyst composition is disposed on a first substrate and the LNT composition is disposed on a second substrate.3. The exhaust gas treatment system of claim 1 , wherein the SCR catalyst composition and the LNT composition are disposed on the same substrate.4. The exhaust gas treatment system of claim 3 , wherein the SCR catalyst composition extends an entire length of the substrate and the LNT composition overlays a portion of the SCR catalyst composition or the SCR catalyst composition overlays the LNT composition.5. The exhaust gas treatment system of claim 3 , wherein the LNT composition extends an entire length of the substrate and the SCR catalyst composition overlays a portion of the LNT composition or the LNT composition overlays the SCR catalyst composition.6. The exhaust gas treatment system of claim 3 , wherein the SCR catalyst composition and the LNT composition do not overlay each other.7. The exhaust gas treatment system of claim 1 , further comprising one or more of a diesel oxidation catalyst claim 1 , a soot filter claim 1 , and an ammonia oxidation catalyst.8. The exhaust gas treatment system of claim 1 , wherein the SCR catalyst composition is close-coupled claim 1 , and wherein the LNT composition is downstream of the SCR catalyst composition claim 1 , further comprising a ...

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Номер записи: 75
11-03-2021 дата публикации

Stable Small-Pore Zeolites

Номер: US20210070619A1
Автор: De Prins Michiel, Hoffmann Andreas Jan, Martens Johan Adriaan, Schuetze Frank-Walter, Smet Sam, Sree Sreeprasanth Pulinthanathu, Van Tendeloo Leen, Verheyen Elke Jane June
Принадлежит:

The present invention provides crystalline aluminosilicate zeolites having a maximum pore size of eight tetrahedral atoms, wherein the zeolite has a total proton content of less than 2 mmol per gram. The zeolite may comprise 0.1 to 10 wt.-% of at least one transition metal, calculated as the respective oxide and based on the total weight of the zeolite. It may furthermore comprise at least one alkali or alkaline earth metal in a concentration of 0 to 2 wt.-%, calculated as the respective metal and based on the total weight of the zeolite. The zeolites may be used for the removal of NOx from automotive combustion exhaust gases. 120-. (canceled)21. A crystalline aluminosilicate zeolite having a maximum pore size of eight tetrahedral atoms , wherein the zeolite has a total proton content of less than 2 mmol per gram , and wherein the zeolite framework type material is chosen from AEI , CHA , LEV , ETL , ESV , and DDR.22. The crystalline aluminosilicate zeolite according to claim 21 , wherein the SAR is between 5 and 50.23. The crystalline aluminosilicate zeolite according to claim 21 , wherein the zeolite comprises at least one transition metal in a concentration of 0.1 to 10 wt.-% claim 21 , calculated as the respective oxides and based on the total weight of the zeolite.24. The crystalline aluminosilicate zeolite according to claim 23 , wherein the at least one transition metal is chosen from copper claim 23 , iron claim 23 , and mixtures thereof.25. The crystalline aluminosilicate zeolite according to claim 23 , wherein the at least one transition metal is introduced into the zeolite during the synthesis of said zeolite by an organic structure-directing agent comprising said at least one transition metal.26. The crystalline aluminosilicate zeolite according to claim 21 , wherein the zeolite comprises at least one alkali and/or alkaline earth metal in a concentration of 0 to 2 wt.-% claim 21 , calculated as the respective metals and based on the total weight of the ...

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Номер записи: 76
11-03-2021 дата публикации

METHOD FOR PRODUCING AN SCR CATALYTIC CONVERTER BY WAY OF PRE-DRYING

Номер: US20210071561A1
Автор: Barth Benjamin, FOERSTER Martin
Принадлежит: UMICORE AG & CO. KG

The present invention relates to a method for producing automobile exhaust gas catalytic converters, to the catalytic converters as such and to the use thereof. In particular, the method comprises a step which results, independently of the actual drying process, in the catalytically active material used being dried. The invention is especially used in the coating of wall-flow filters. 1. Method for producing a catalyst containing zeolites or zeotypes for the aftertreatment of exhaust gases of an internal combustion engine ,characterized in thatthe zeolite or the zeotype is a metal ion-exchanged zeolite or zeotype and, after it is coated onto and/or into a support, is pre-dried in such a way that a gas stream is guided through the support for a sufficient period of time and with a sufficient intensity, so that the solids content in the applied washcoat layer is set to 45%-60% before the support is completely dried and/or calcined.2. Method according to claim 1 ,characterized in thatzeolites or zeotypes are those derived from structure types selected from the group consisting of CHA, LEV, AEI, AFX, AFI or KFI framework or a mixture thereof.3. Method according to claim 1 ,characterized in thatthe zeolite or zeotype is exchanged with iron and/or copper ions.4. Method according to claim 1 ,characterized in thatthe coating has a binder selected from the group consisting of aluminum oxide, titanium dioxide, zirconium dioxide, silicon dioxide or mixtures thereof.5. Method according to claim 1 ,characterized in thatthe support is a wall-flow filter.6. Method according to claim 1 ,characterized in thatthe gas stream lasts for a period of time of 10 to 120 seconds.7. Method according to claim 1 ,characterized in that the moisture of the gas stream is reduced to values of less than 5 g of water per kilogram of gas.8. Method according to claim 1 ,characterized in thatthe gas stream does not exceed a temperature of 60° C.9. Method according to claim 1 ,characterized in thatthe ...

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Номер записи: 77
19-03-2015 дата публикации

EXHAUST SYSTEM WITH A MODIFIED LEAN NOx TRAP

Номер: US20150075140A1
Автор: Daniel Swallow
Принадлежит: JOHNSON MATTHEY PLC

An exhaust system for treating an exhaust gas from an internal combustion engine is disclosed. The system comprises a modified lean NO x trap (LNT), a urea injection system, and an ammonia-selective catalytic reduction (NH 3 -SCR) catalyst. The modified LNT comprises platinum, palladium, barium, and a ceria-containing material, and has a platinum:palladium molar ratio of at least 3:1. The modified LNT stores NO x at temperatures below about 200° C. and releases the stored NO x at temperatures above about 200° C. The urea injection system injects urea at temperatures above about 180° C.

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Номер записи: 78
15-03-2018 дата публикации

EXHAUST GAS PURIFYING CATALYST AND METHOD FOR PRODUCING THE SAME

Номер: US20180071718A1
Автор: ABE Motoya, CHIBA Akiya, HAGA Shunsuke, Kanazawa Takaaki, NAITO Isao
Принадлежит:

An exhaust gas purifying catalyst with an excellent effect of suppressing deterioration due to aggregation of a noble metal catalyst during endurance at high temperature, and a production method therefor. The method for producing the exhaust gas purifying catalyst that has a porous carrier and a noble metal catalyst supported thereon includes: preparing the porous carrier that contains alumina-ceria-zirconia composite oxide particles and has physical property values, after subjected to baking at 900° C. for 5 hours, of 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/g, a crystallite size of a ceria-zirconia composite oxide 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/g, and bringing a noble metal chemical solution having an aggregate of platinum or the like with a grain size adjusted to less than or equal to 1 nm with the use of a platinum nitric acid solution or the like, into contact with the porous carrier, so that the noble metal catalyst is supported on the porous carrier. 1. A method for producing an exhaust gas purifying catalyst including a porous carrier and a noble metal catalyst supported on the porous carrier , the porous carrier containing particles of an alumina-ceria-zirconia composite oxide , the method comprising:{'sup': 2', '3, 'preparing the porous carrier having physical property values, after subjected to baking at 900° C. for 5 hours, of a pore diameter of the particles in a range of 2 to 20 nm, a specific surface area of the particles in a range of 75 to 115 m/g, a crystallite size of a ceria-zirconia composite oxide that is contained in the particles in a range of 4 to 6 nm, and a bulk density of the particles in a range of 0.5 to 0.9 cm/g; and'}bringing a noble metal chemical solution into contact with the porous carrier, the noble metal chemical solution having an aggregate of one of ...

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Номер записи: 79
24-03-2022 дата публикации

CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS AND THEIR NOVEL SYNTHESES

Номер: US20220088575A1
Автор: HAYASHI Daijiro, KURASHIGE Wataru, MURESAN Nicoleta, NAGAOKA Shuhei, ZHANG Xiaorui
Принадлежит:

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first palladium (Pd) component and a first Pd support material, wherein the substrate is substantially free of the first Pd component. 1. A catalytic article for treating exhaust gas comprising:a substrate comprising an inlet end and an outlet end with an axial length L;a first catalytic region comprising a first palladium (Pd) component and a first Pd support material, wherein the substrate is substantially free of the first Pd component.2. The catalytic article of claim 1 , wherein the first catalytic region further comprises a first platinum (Pt) component claim 1 , wherein the first Pt component is at least partially supported on the first Pd support material claim 1 , and wherein the substrate is substantially free of the first Pt component.3. The catalytic article of claim 1 , wherein the first Pd support material is a first oxygen storage capacity (OSC) material claim 1 , a first inorganic oxide claim 1 , or a combination thereof.4. The catalytic article of claim 1 , wherein the substrate is essentially free of the first Pd component.5. The catalytic article of claim 2 , wherein the substrate is essentially free of the first Pt component.6. The catalytic article of claim 1 , wherein the first catalytic region further comprises a first alkaline earth metal.7. The catalytic article of claim 6 , wherein the first alkaline earth metal is barium claim 6 , or strontium claim 6 , and mixed oxides or composite oxides thereof.8. The catalytic article of claim 6 , wherein the first alkaline earth metal is present as carbonate or sulfate.9. The catalytic article of claim 8 , wherein the first alkaline earth metal is present as sulfate.10. The catalytic article of claim 9 , wherein the first ...

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Номер записи: 80
07-03-2019 дата публикации

POWDER FOR CATALYSTS AND CATALYST FOR EXHAUST GAS PURIFICATION

Номер: US20190070590A1
Автор: MASAKI Takanori, Nagao Yuki, Nakahara Yunosuke
Принадлежит:

A catalyst powder according to the present invention is a catalyst powder that includes: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and contains ceria and zirconia. The ratio (M/M) is 0.30 or more and 0.95 or less, the ratio (M/M) being the ratio of a mole fraction M(mol %) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M(mol %) of cerium in the entire powder. It is preferable that the ratio (M/M) between Mand Mis 1.1 or more and 5.0 or less, wherein M(=M/M) represents the ratio between a mole fraction M(mol %) of zirconium in the entire powder and a mole fraction M(mol %) of cerium in the entirety of the powder, and M(=M/M) represents the ratio between a mole fraction M(mol %) of zirconium measured using X-ray photoelectron spectroscopy and a mole fraction M(mol %) of cerium measured using X-ray photoelectron spectroscopy. 1. A catalyst powder comprising: a core portion that contains ceria and zirconia; and a surface layer portion that is located on the core portion and that contains ceria and zirconia ,{'sub': 2', '1', '2', '1', '2', '1, 'wherein a ratio (M/M) is 0.30 or more and 0.95 or less, the ratio (M/M) being a ratio of a mole fraction M(mol %) of cerium in the surface layer portion measured using X-ray photoelectron spectroscopy to a mole fraction M(mol %) of cerium in the entire powder.'}2. The catalyst powder according to claim 1 , comprising: a core particle that contains ceria and zirconia; and a supported metal oxide that is supported on a surface of the core particle and that contains ceria and zirconia claim 1 ,wherein the surface layer portion constitutes at least a portion of the supported metal oxide.3. The catalyst powder according to claim 1 ,{'sub': 4/2', '4', '2', '4', '2, 'wherein M(=M/M) that is a ratio of Mand Mis greater than 1,'}{'sub': 4', '2, 'wherein M(mol %) represents a mole fraction of zirconium in the ...

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Номер записи: 81
07-03-2019 дата публикации

CATALYST COMPOSITION COMPRISING MAGNETIC MATERIAL ADAPTED FOR INDUCTIVE HEATING

Номер: US20190070596A1
Автор: Caudle Matthew Tyler, YANG Xiaofan
Принадлежит:

The invention provides a catalyst composition, including a mixture of catalytically active particles and a magnetic material, such as superparamagnetic iron oxide nanoparticles, capable of inductive heating in response to an applied alternating electromagnetic field. The catalytically active particles will typically include a base metal, platinum group metal, oxide of base metal or platinum group metal, or combination thereof, and will be adapted for use in various catalytic systems, such as diesel oxidation catalysts, catalyzed soot filters, lean NOx traps, selective catalytic reduction catalysts, ammonia oxidation catalysts, or three-way catalysts. The invention also includes a system and method for heating a catalyst material, which includes a catalyst article that includes the catalyst composition and a conductor for receiving current and generating an alternating electromagnetic field in response thereto, the conductor positioned such that the generated alternating electromagnetic field is applied to at least a portion of the magnetic material. 1. A catalyst composition , comprising a mixture of catalytically active particles and a magnetic material capable of inductive heating in response to an applied alternating electromagnetic field.2. The catalyst composition of claim 1 , wherein the magnetic material is superparamagnetic.3. The catalyst composition of claim 1 , wherein the magnetic material is in particulate form.4. The catalyst composition of claim 3 , wherein the magnetic material is in nanoparticle form.5. The catalyst composition of claim 1 , wherein the magnetic material comprises a transition metal or a rare earth metal.6. The catalyst composition of claim 1 , wherein the magnetic material comprises superparamagnetic iron oxide nanoparticles.7. The catalyst composition of claim 1 , wherein the magnetic material comprises a rare earth containing particulate material comprising neodymium-iron-boron or samarium-cobalt particles.8. The catalyst ...

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Номер записи: 82
05-03-2020 дата публикации

Exhaust gas-purifying catalyst composition and method for producing the same, and automobile exhaust gas-purifying catalyst

Номер: US20200070126A1
Автор: Hiroki Nakayama, Hiroyuki Hara, Makoto Nagata
Принадлежит: NE Chemcat Corp

There are provided an exhaust gas-purifying catalyst composition that can purify hydrocarbons, carbon monoxide, nitrogen oxides, and the like discharged from an internal combustion engine or the like, and can maintain excellent purification performance particularly under a wide range of conditions from low temperature to high temperature, and a method for producing the same, and an automobile exhaust gas-purifying catalyst. The present invention provides an exhaust gas-purifying catalyst composition for purifying carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), and the like in exhaust gas, comprising at least Rh; a complex oxide that is a particular Ce-containing component (A) and/or a particular Zr-containing component (B); and alumina, wherein Rh is supported on alumina together with the complex oxide, an amount of Rh supported is 0.01 to 5 wt % based on a total amount of Rh, the complex oxide, and alumina, and a content of the complex oxide is 0.1 to 30 wt % in total based on the total amount of Rh, the complex oxide, and alumina, and the like.

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Номер записи: 83
22-03-2018 дата публикации

Oxidation catalyst for hydrocarbons produced by an internal combustion engine

Номер: US20180078898A1
Автор: Hai-Ying Chen, Joseph Fedeyko, Kevin Doura, Paul Andersen
Принадлежит: JOHNSON MATTHEY PLC

An oxidation catalyst is described for treating hydrocarbons in an exhaust gas produced by an internal combustion engine, wherein the oxidation catalyst comprises a region disposed on a substrate, wherein the region comprises ruthenium (Ru) supported on a support material comprising a refractory oxide.

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Номер записи: 84
22-03-2018 дата публикации

STAINLESS STEEL SHEET FOR EXHAUST SYSTEM PART USE EXCELLENT IN INTERMITTENT OXIDATION CHARACTERISTIC AND EXHAUST SYSTEM PART

Номер: US20180080106A1
Автор: HAMADA Junichi, INOUE Yoshiharu, TERAOKA Shinichi, YAKAWA Atsuhisa
Принадлежит: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION

A stainless steel sheet free of surface flaws, having an enhanced high temperature strength and corrosion resistance, not becoming brittle at a high temperature, and further exhibiting a high oxidation resistance enabling it to be suitably used as an inside pipe of a double pipe of an exhaust manifold, a turbocharger part, and other automobile exhaust system parts, which stainless steel sheet has a predetermined composition of chemical components and satisfies Cr+20Mo≧24.0%, and Si+20C+15N≧5.8%. Further, an automobile exhaust system part, excellent in both the oxidation resistances of the base material and weld zone using the above stainless steel sheet, having a gradient of change of sheet thickness between the weld metal and the base material of the above stainless steel sheet of 15 degrees or less. 1. A stainless steel sheet for exhaust system part use excellent in intermittent oxidation characteristic comprising , by mass % ,C: 0.05 to 0.15%,Si: 1.0% to 4.0%,Mn: 0.5 to 3.5%,P: 0.010 to 0.040%,S: 0.0001 to 0.010%,Cr: 20 to 30%,Ni: 8 to 25%,Mo: 0.01 to 1.5%,Al: 0.001 to 0.10%, andN: 0.13 to 0.50%,having a balance of Fe and unavoidable impurities, and [{'br': None, 'Cr+20Mo≧24.0% and'}, {'br': None, 'Si+20C+15N≧5.8%.'}], 'having contents of Cr, Mo, Si, C, and N satisfying'}2. The stainless steel sheet for exhaust system part use excellent in intermittent oxidation characteristic according to claim 1 , further comprising claim 1 , by mass % claim 1 , one or more ofCu: 0.1 to 3.0%,V: 0.03 to 0.5%,Ti: 0.001 to 0.3%,Nb: 0.001 to 0.3%,B: 0.0001 to 0.0050%, andCa: 0.001 to 0.010%.3. The stainless steel sheet for exhaust system part use excellent in intermittent oxidation characteristic according to claim 1 , further comprising claim 1 , by mass % claim 1 , one or more ofW: 0.01 to 3.00%,Zr: 0.05 to 0.30%,Sn: 0.01 to 0.10%,Co: 0.01 to 0.30%, andMg: 0.0002% to 0.010%.4. An exhaust system part having a welded structure using a stainless steel sheet according to as a base ...

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Номер записи: 85
31-03-2022 дата публикации

CATALYTIC CONVERTER

Номер: US20220097026A1
Автор: James Alexander, Li Hu, Plane John Maurice Campbell
Принадлежит: UNIVERSITY OF LEEDS

A catalytic converter including a catalyst, the catalyst comprising a material of olivine composition, an engine comprising this catalytic converter and an method of producing nitrogen from NOx comprising the catalytic reduction of NOx by a catalyst comprising of a material of olivine composition. In addition, the use of a material of olivine composition in a catalytic reduction of NOx and a method of manufacture of a catalytic converter comprising adding the catalyst to a wash coat, applying the catalyst containing wash coat to a substrate and annealing the coated substrate. 1. A catalytic converter including a catalyst , the catalyst comprising a material of olivine composition.2. A catalytic converter according to claim 1 , wherein material has the formula:{'br': None, 'sub': x', '2-x', '4, 'MgFeSiO'}wherein x is in the range 0-2.3. A catalytic converter according to claim 1 , wherein x is in the range 0.1-2.4. A catalytic converter according to wherein the material comprises a combination of crystalline and amorphous regions.5. A catalytic converter according to claim 4 , wherein the crystalline regions comprise iron-containing compounds.6. A catalytic converter according to claim 5 , wherein the iron-containing compounds are selected from iron silicate claim 5 , iron oxide claim 5 , iron oxide-hydroxide and combinations thereof.7. A catalytic converter according to wherein the material is a high surface area material.8. A catalytic converter according to claim 1 , further comprising a reductant.9. A catalytic converter according to claim 8 , wherein the reductant comprises ammonia.10. An engine comprising a catalytic converter according to .11. An engine according to claim 10 , wherein the engine is a diesel engine.12. An engine according to claim 10 , wherein the engine is selected from a static engine or a vehicle engine.13. A method of producing nitrogen from NOx comprising the catalytic reduction of NOx by a catalyst comprising a material of olivine ...

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Номер записи: 86
12-03-2020 дата публикации

Three-way catalyst

Номер: US20200078769A1
Автор: Curt M. ELLIS, Geon Seog Son, John G. Nunan, Ryan J. Andersen
Принадлежит: Umicore AG and Co KG

The present invention relates to a catalyst comprising a carrier substrate of the length L extending between substrate ends a and b and three washcoat zones A, B and C wherein washcoat zone A comprises one or more first platinum group metals and extends starting from substrate end a over a part of the length L, washcoat zone C comprises one or more first platinum group metals and extends starting from substrate end b over a part of the length L, and washcoat zone B comprises the same components as washcoat zone A and in addition, one or more second platinum group metals and extends between washcoat zones A and C, wherein L=L A +L B +L C , wherein L A is the length of washcoat zone A, L B is the length of substrate length B and L C is the length of substrate length C.

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Номер записи: 87
21-03-2019 дата публикации

EXHAUST GAS PURIFYING CATALYST

Номер: US20190083932A1
Автор: MURAKAMI Kyosuke, Onozuka Takashi, Taki Kenichi
Принадлежит:

An exhaust gas purifying catalyst according to the present invention is provided with a base material and a catalyst-coated layer The catalyst-coated layer is provided with a lower layer and an upper layer The upper layer contains Rh and/or Pt as a noble metal catalyst. The lower layer contains Pd as a noble metal catalyst. The lower layer is provided with a front-stage lower layer positioned on an upstream side and a rear-stage lower layer positioned on a downstream side. The front-stage lower layer is a Ce-free layer that does not contain a Ce-containing oxide. The rear-stage lower layer is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure. 1. An exhaust gas purifying catalyst arranged inside an exhaust passage of an internal combustion engine and purifying exhaust gas discharged from the internal combustion engine , the exhaust gas purifying catalyst comprising: 'a catalyst-coated layer formed on a surface of the base material, wherein', 'a base material; and'}the catalyst-coated layer is formed in a laminate structure having upper and lower layers, with a layer closer to the base material surface being the lower layer and a layer relatively farther from the base material surface being the upper layer,the upper layer contains Rh and/or Pt as a noble metal catalyst, and a Ce-containing oxide which contains cerium,the lower layer contains Pd as a noble metal catalyst,the lower layer is provided with, in a circulation direction of the exhaust gas, a front-stage lower layer positioned on an upstream side and a rear-stage lower layer positioned on a downstream side,the front-stage lower layer is a Ce-free layer that does not contain a Ce-containing oxide, andthe rear-stage lower layer is a Ce-containing layer that contains a Ce-containing oxide with a pyrochlore structure.2. The exhaust gas purifying catalyst according to claim 1 , wherein an amount of Ce in the Ce-containing oxide with a pyrochlore structure in the rear-stage lower ...

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Номер записи: 88
21-03-2019 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20190083964A1
Автор: Hikazudani Susumu, Shono Emi, YOSHIDA Satoshi
Принадлежит: HITACHI ZOSEN CORPORATION

Object and purpose are to provide an exhaust gas purification catalyst capable of efficiently removing a nitrogen oxide in a relatively low-temperature exhaust gas discharged from a marine diesel engine or the like using a reducing agent in a smaller amount than in the past. An exhaust gas purification catalyst is used in a combustion exhaust gas purification method for removing a nitrogen oxide in a combustion exhaust gas by reducing the nitrogen oxide to nitrogen, wherein an alcohol is added to the combustion exhaust gas as a reducing agent for reducing the nitrogen oxide, and is characterized in that the catalyst is composed of a support and a denitration catalytic metal supported on the support, and the support is a zeolite having a value (S) obtained by dividing a peak area (A) in an Al—OH spectrum measured with a Fourier transform infrared spectrometer (FT-IR) by a measurement support weight (W) of 1500 to 3500. 1. An exhaust gas purification catalyst , which is used in a combustion exhaust gas purification method for removing a nitrogen oxide in a combustion exhaust gas by reducing the nitrogen oxide to nitrogen , wherein an alcohol is added to the combustion exhaust gas as a reducing agent for reducing the nitrogen oxide , characterized in thatthe catalyst is composed of a support and a denitration catalytic metal supported on the support, and the support is a zeolite having a value (S) obtained by dividing a peak area (A) in an Al—OH spectrum measured with a Fourier transform infrared spectrometer (FT-IR) by a measurement support weight (W) of 1500 to 3500.2. The exhaust gas purification catalyst according to claim 1 , wherein the zeolite has an FER-type structure.3. The exhaust gas purification catalyst according to claim 1 , wherein the denitration catalytic metal is Bi.4. The exhaust gas purification catalyst according to claim 2 , wherein the denitration catalytic metal is Bi. The present invention relates to an exhaust gas purification catalyst for ...

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Номер записи: 89
21-03-2019 дата публикации

EXHAUST GAS-PURIFYING COMPOSITION

Номер: US20190083965A1
Автор: NISHIKAWA Jo, WATANABE Satoshi, Yamaguchi Michitaka
Принадлежит:

An exhaust gas purifying composition of the present invention contains zeolite that is BEA zeolite having an SiO/AlOmolar ratio of greater than 25 and 600 or less and containing phosphorus. Furthermore, the exhaust gas purifying composition preferably contains zirconium in addition to phosphorus. Furthermore, the zeolite has an SiO/AlOmolar ratio of from 30 to 150. The present invention provides an exhaust gas purifying composition having excellent HC adsorbability for exhaust gas purification in internal combustion engines such as gasoline engines. 1. An exhaust gas purifying composition comprising BEA zeolite which has an SiO/AlOmolar ratio of greater than 25 and 600 or less and which contains phosphorus and zirconium , wherein an amount of the phosphorus contained in the zeolite is such that a molar ratio (P/Al) thereof with respect to Al in the BEA zeolite is 0.5 or greater , and an amount of the zirconium contained in the zeolite is such that a molar ratio (Zr/Al) thereof with respect to Al in the zeolite is 0.25 or greater.2. (canceled)3. The exhaust gas purifying composition according to claim 1 , wherein the zeolite has an SiO/AlOmolar ratio of from 30 to 150.4. Use of a composition for exhaust gas purification treatment claim 1 , the composition comprising BEA zeolite which has an SiO/AlOmolar ratio of greater than 25 and 600 or less and which contains phosphorus and zirconium claim 1 , wherein an amount of the phosphorus contained in the zeolite is such that a molar ratio (P/Al) thereof with respect to Al in the BEA zeolite is 0.5 or greater claim 1 , and an amount of the zirconium contained in the zeolite is such that a molar ratio (Zr/Al) thereof with respect to Al in the zeolite is 0.25 or greater.5. An exhaust gas purification method for purifying exhaust gas claim 1 , using a composition comprising BEA zeolite which has an SiO/AlOmolar ratio of greater than 25 and 600 or less and which contains phosphorus and zirconium claim 1 , wherein an amount of ...

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Номер записи: 90
21-03-2019 дата публикации

DESULFATION METHOD FOR SCR CATALYST

Номер: US20190083967A1
Автор: Tang Weiyong, YANG Xiaofan, Zhang Ze
Принадлежит:

The present invention provides methods for low temperature desulfating sulfur-poisoned SCR catalysts, and emission control systems adapted to apply such desulfating methods, in order to regenerate catalytic NOx conversion activity. The methods are adapted for treating an SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst, the treating step including treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature, wherein the first treatment temperature is about 350° C. or less, followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature, wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher. 1. A method for desulfating a SCR catalyst having sulfur thereon , comprising treating the SCR catalyst to desorb sulfur from the surface of the SCR catalyst and increase NOx conversion activity of the SCR catalyst , the treating step comprising treating the SCR catalyst with a gaseous stream comprising a reductant for a first treatment time period and at a first treatment temperature , wherein the first treatment temperature is about 350° C. or less , followed by a second treatment time period and a second treatment temperature higher than the first treatment temperature , wherein the molar ratio of reductant to NOx during the treating step is about 1.05:1 or higher.2. The method of claim 1 , wherein the first treatment temperature is about 300° C. or less.3. The method of claim 1 , wherein the first treatment temperature is about 250° C. or less.4. The method of claim 1 , wherein the second treatment temperature is in the range of about 400° C. to about 600° C.5. The method of claim 1 , wherein the second treatment temperature is in the range of about 400° C. to about 450° C.6. The method of claim 1 , wherein both the first ...

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Номер записи: 91
29-03-2018 дата публикации

FILTER REGENERATION DEVICE, FILTER PLUGGING DETECTION DEVICE, EXHAUST GAS TREATMENT APPARATUS, AND FILTER PLUGGING DETERMINATION METHOD

Номер: US20180087421A1
Автор: IMADA Tadahiro
Принадлежит: FUJITSU LIMITED

A filter regeneration device includes a microwave radiator configured to radiate a microwave and disposed to be oriented in a direction toward a ceramic filter configured to purify exhaust gas of an internal combustion engine, the ceramic filter being disposed in a cylindrical portion of a metallic case having the cylindrical portion and having a protruding portion protruding toward an outside of the cylindrical portion of the metallic case, the microwave radiator being disposed inside the protruding portion, and a microwave generator configured to generate the microwave radiated from the microwave radiator toward the ceramic filter. 1. A filter regeneration device comprising:a microwave radiator configured to radiate a microwave and disposed to be oriented in a direction toward a ceramic filter configured to purify exhaust gas of an internal combustion engine, the ceramic filter being disposed in a cylindrical portion of a metallic case having the cylindrical portion and having a protruding portion protruding toward an outside of the cylindrical portion of the metallic case, the microwave radiator being disposed inside the protruding portion; anda microwave generator configured to generate the microwave radiated from the microwave radiator toward the ceramic filter.2. The filter regeneration device as claimed in claim 1 , whereinthe microwave generator includes a high electron mobility transistor made of gallium nitride.3. The filter regeneration device as claimed in claim 1 , further comprising:a temperature detector disposed on an outer circumference of the ceramic filter and configured to measure a temperature of the ceramic filter; andan output controller configured to control output of the microwave generated by the microwave generator, whereinthe output controller lowers the output of the microwave generated by the microwave generator as the temperature detected by the temperature detector becomes higher, and raises the output of the microwave generated by ...

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Номер записи: 92
30-03-2017 дата публикации

Oxidation Catalyst for Treating the Exhaust Gas of a Compression Ignition Engine

Номер: US20170087512A1
Автор: BERGEAL David, CHIFFEY ANDREW FRANCIS, GOODWIN John Benjamin, HATCHER Daniel, Moreau François, PHILLIPS PAUL RICHARD, PRENDERGAST Cathal, RAJ Agnes, RAJARAM RAJ RAO
Принадлежит:

An exhaust system for a compression ignition engine comprising an oxidation catalyst for treating carbon monoxide (CO) and hydrocarbons (HCs) in exhaust gas from the compression ignition engine, wherein the oxidation catalyst comprises: a platinum group metal (PGM) component selected from the group consisting of a platinum (Pt) component, a palladium (Pd) component and a combination thereof; an alkaline earth metal component; a support material comprising a modified alumina incorporating a heteroatom component; and a substrate, wherein the platinum group metal (PGM) component, the alkaline earth metal component and the support material are disposed on the substrate. 1. An exhaust system for a compression ignition engine comprising an oxidation catalyst for treating carbon monoxide (CO) and hydrocarbons (HCs) in exhaust gas from the compression ignition engine , wherein the oxidation catalyst comprises:a platinum group metal (PGM) component selected from the group consisting of a platinum (Pt) component, a palladium (Pd) component and a combination thereof;an alkaline earth metal component;a support material comprising a modified alumina incorporating a heteroatom component; anda substrate; and{'sup': '−3', 'wherein the platinum group metal (PGM) component, the alkaline earth metal component and the support material are disposed on the substrate, and optionally the total amount of the alkaline earth metal component is 10 to 500 gft.'}2. An exhaust system according to claim 1 , wherein the modified alumina incorporating a heteroatom component is an alumina doped with a heteroatom component claim 1 , an alkaline earth metal aluminate or a mixture thereof.3. An exhaust system according to claim 2 , wherein the heteroatom component comprises silicon claim 2 , magnesium claim 2 , barium claim 2 , lanthanum claim 2 , cerium claim 2 , titanium claim 2 , zirconium or a combination of two or more thereof.4. An exhaust system according to claim 1 , wherein the modified alumina ...

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Номер записи: 93
30-03-2017 дата публикации

Exhaust gas post-processing system

Номер: US20170089240A1
Автор: Jin Woo Choung
Принадлежит: Hyundai Motor Co

An exhaust gas post-processing system includes an oxidation catalyst configured to oxidize substances included in the exhaust gas; a diesel particulate filter configured to collect particulate matters included in the exhaust gas and disposed subsequent to the oxidation catalyst; a dosing module configured to inject a reducing agent and disposed subsequent to the diesel particulate filter; and a selective catalytic reduction configured to remove nitrogen oxide using the reducing agent included in the exhaust gas and disposed subsequent to the dosing module. The diesel particulate filter includes a catalytic component represented by La 1-x Ag x MnO 3 (where 0<x<1).

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Номер записи: 94
05-05-2022 дата публикации

NOVEL TRI-METAL PGM CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS

Номер: US20220134314A1
Автор: Howard Michael, Liu Dongxia, QIAO Dongsheng, SHANG Zhou, VLACHOU Maria, XU Xuan
Принадлежит:

A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L; a first catalytic region comprising a first platinum group metal (PGM) component, wherein the first PGM component comprises Rh and Pt; a second catalytic region comprising a second PGM component, wherein the second PGM component comprises Pd; and wherein the first PGM component has a Pt to Rh ratio of at least 1:20.

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Номер записи: 95
05-05-2022 дата публикации

Internal Combustion Engine Exhaust Aftertreatment System

Номер: US20220136424A1
Автор: Adelman Bradley Jay
Принадлежит:

An engine exhaust aftertreatment system having an organization and arrangement of certain selected components which achieve significant catalytic reduction of the known NOx pollutants (NO and NO) in tailpipe-out exhaust, while also achieving significant catalytic reduction of sulfate pollutants in tailpipe-out exhaust.

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Номер записи: 96
19-03-2020 дата публикации

CATALYST AND METHOD FOR PREPARING CATALYST

Номер: US20200086303A1
Автор: HONG Suk Bong, JO Donghui, Kim Chang Hwan, KIM Pyung Soon, NAM In-Sik, PARK Gi Tae, RYU Taekyung
Принадлежит:

A catalyst includes LTA zeolite including copper ions, wherein a Si/Al ratio of the LTA zeolite is 2 to 50. The catalyst is coated on a honeycomb carrier or a filter. The catalyst removes NOx from a reaction gas at 100° C. or above. The catalyst has an NOx conversion rate of 80% at 450° C. or above. 1. A method for manufacturing a catalyst , comprising steps of:preparing a LTA zeolite of which a Si/Al ratio is 2 or more;preparing LTA zeolite containing ions by using the LTA zeolite; andpreparing a copper-type of LTA zeolite by performing copper ion exchange on the ion-containing LTA zeolite.2. The method of claim 1 , wherein a Si/Al ratio of the LTA zeolite is 2 to 50.3. The method of claim 1 , wherein the step of preparing the ion-containing LTA zeolite comprises substituting ions in the LTA zeolite.4. The method of claim 1 , wherein the step of preparing the ion-containing LTA zeolite comprises adding the LTA zeolite to an ammonium salt for reaction and then drying the LTA zeolite claim 1 , and{'sub': 4', '3, 'wherein the ammonium salt is ammonium nitrate (NHNO).'}5. The method of claim 1 , wherein the step of performing copper ion exchanging on the ion-containing LTA zeolite comprises adding the ion-containing LTA zeolite to a copper precursor solution and stirring the solution.6. The method of claim 1 , further comprising thermally treating the copper type of LTA zeolite after the preparing of the copper-type LTA zeolite claim 1 ,wherein the thermal treatment is performed at a temperature ranging from 1 to 30° C./min from 400 to 750° C.7. The method of claim 1 , wherein the step of preparing the LTA zeolite having the Si/Al ratio of 2 or more comprises preparing the LTA zeolite using an LTA seed.8. A method for manufacturing a catalyst claim 1 , comprising steps of:preparing an LTA zeolite of which a Si/Al ratio is 2 or more;preparing an LTA zeolite containing ions using the LTA zeolite; andpreparing an iron type of LTA zeolite by performing iron (Fe) ion ...

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Номер записи: 97
19-03-2020 дата публикации

DIRECT SYNTHESIS OF A SAPO MATERIAL WITH AFX STRUCTURE COMPRISING COPPER AND USE OF THIS MATERIAL

Номер: US20200086305A1
Автор: BERTHOUT David, HARBUZARU Bogdan, LLIDO Eric
Принадлежит: IFP ENERGIES NOUVELLES

The invention concerns a process for preparing a copper-comprising SAPO material with AFX structure, comprising at least the steps of mixing, in an aqueous medium, at least one aluminum source, at least one silicon source, at least one copper source, at least one phosphorus source, a TETA complexing agent and a TMHD structuring agent, in order to obtain a gel, and hydrothermal treatment of said gel with a shear rate of less than 50 sin order to obtain crystallization of said copper-comprising SAPO material with AFX structure. 1. A process for preparing a copper-comprising SAPO material with AFX structure , comprising at least the following steps: {'br': None, 'i': a', ':b', ':c', ':d', 'e', ':f', 'g, 'sub': 2', '2', '3', '2', '5', '4', '2, 'SiOAlOPOTMHD:CuSOTETA:HO'}, 'a) mixing, in an aqueous medium, of at least one aluminum source, at least one silicon source, at least one copper source, at least one phosphorus source, a complexing agent, TETA, and a structuring agent, TMHD, in order to obtain a gel of formulaa/c being between 0.1 and 1, b/c being between 0.1 and 1, g/c being between 1 and 100, d/c being between 0.5 and 4, e/c being between 0.005 and 0.1 and f/e being between 1 and 1.5;{'sup': '−1', 'b) hydrothermal treatment of said gel at a temperature of between 170 and 220° C., under an autogenous reaction pressure, for a period of between 1 and 3 days with a shear rate of less than 50 sin order to obtain the crystallization of said copper-comprising SAPO material with AFX structure.'}2. The process as claimed in claim 1 , wherein said step b) is carried out at a temperature of between 190 and 210° C.3. The process as claimed in claim 1 , wherein said step b) is carried out for a period of between 1 and 2 days.4. The process as claimed in claim 1 , wherein said step b) is carried out in the absence of stirring.5. The process as claimed in claim 1 , said step b) is carried out with a shear rate of between 0.1 and 50 s.6. The process as claimed in claim 1 , ...

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Номер записи: 98
19-03-2020 дата публикации

SCR CATALYST DEVICE CONTAINING VANADIUM OXIDE AND MOLECULAR SIEVE CONTAINING IRON

Номер: US20200088080A1
Автор: Malmberg Stephan, Soeger Nicola
Принадлежит: UMICORE AG & CO. KG

The invention relates to a catalyst device for purifying exhaust gases containing nitrogen oxide by using selective catalytic reduction (SCR), the catalyst device comprising at least two catalytic layers, the first layer containing vanadium oxide and a mixed oxide comprising titanium oxide and silicon oxide and the second layer containing a molecular sieve containing iron, wherein the first layer is applied onto the second layer. The invention also relates to uses of the catalyst device and a method for purifying exhaust gases. 1. Catalyst device for purifying exhaust gases containing nitrogen oxide by selective catalytic reduction (SCR) , comprising at least two catalytic layers , the first layer containing vanadium oxide and a mixed oxide comprising titanium oxide and silicon oxide and the second layer containing a molecular sieve containing iron , wherein the first layer is applied onto the second layer.2. Catalyst device according to claim 1 , wherein the first layer contains at least one further component selected from oxides of tungsten and aluminum.3. Catalyst device according to claim 1 , wherein the first layer additionally contains cerium oxide.4. Catalyst device according to claim 1 , wherein the first layer comprises the following components:{'sub': 2', '5, '(a) from 0.5 to 10 wt % vanadium oxide, calculated as VO.'}{'sub': '3', '(b) from 0 to 17 wt % tungsten oxide, calculated as WO,'}{'sub': '2', '(c) from 0 to 10 wt % cerium oxide, calculated as CeO,'}{'sub': '2', '(d) from 25 to 98 wt % titanium oxide, calculated as TiO,'}{'sub': '2', '(e) from 0.5 to 15 wt % silicon oxide, calculated as SiO,'}{'sub': 2', '3, '(f) from 0 to 15 wt % aluminum oxide, calculated as AlO, in each case based on the weight of the first layer.'}5. Catalyst device according to claim 1 , wherein the molecular sieve is a zeolite.6. Catalyst device according to claim 5 , wherein the zeolite is an iron-exchanged zeolite.7. Catalyst device according to claim 5 , wherein the zeolite ...

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Номер записи: 99
01-04-2021 дата публикации

Composite Material

Номер: US20210094025A1
Автор: Bauer Juergen, Dotzel Ralf, Muench Joerg Werner, Purova Ralitsa, SCHWIEGER Wilhelm, Selvam Thangaraj, Shahid Ameen
Принадлежит:

A composite material comprises a macroporous silicate-based material at least partially substituted with at least one microporous zeolite, wherein the microporous zeolite is functionalised with either copper, iron or both copper and iron, and wherein the composite material is in the form of particles. The composite material can be obtained using a method comprising the steps of: (i) providing a mixture comprising a silicate-containing scaffold having a macroporous structure, an aluminium source and an organic template; (ii) hydrothermally treating the mixture to form a microporous zeolite-containing structure substantially retaining the macroporous structure of the silicate-containing scaffold; (iii) incorporating copper, iron or both copper and iron into the zeolite. The silicate-containing scaffold can be a diatomaceous earth. 1. A method for the manufacture of a zeolite-containing structure , the method comprising:(i) providing a mixture comprising a silicate-containing scaffold having a macroporous structure, an aluminium source and an organic template;ii) hydrothermally treating the mixture to form a microporous zeolite-containing structure substantially retaining the macroporous structure of the silicate-containing scaffold;iii) incorporating copper, iron or both copper and iron into the zeolite.2. The method of claim 1 , wherein the zeolite has a ratio of silica to alumina of 10:1 to 50:1 claim 1 , and the silicate-containing scaffold is essentially the sole source of silicon atoms for the zeolite structure.3. The method of claim 1 , wherein the microporous zeolite comprises chabazite.4. The method of claim 1 , wherein the silicate-containing scaffold comprises one or more of porous glass claim 1 , silica gel claim 1 , and a diatomaceous earth claim 1 , preferably wherein the silicate-containing scaffold comprises a diatomaceous earth.5. The method of claim 1 , wherein the silicate-containing scaffold comprises a cylindrical structure.6. The method of claim 1 ...

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Номер записи: 100