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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 2059. 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
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: 3
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: 4
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: 5
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: 6
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: 7
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: 8
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: 9
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: 10
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: 11
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: 12
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: 13
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: 14
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: 15
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: 16
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: 17
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: 18
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: 19
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: 20
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: 21
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: 22
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: 23
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: 24
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: 25
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: 26
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: 27
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: 28
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: 29
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: 30
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: 31
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: 32
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: 33
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: 34
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: 35
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: 36
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: 37
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: 38
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: 39
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: 40
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: 41
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: 42
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: 43
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: 44
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: 45
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: 46
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: 47
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: 48
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: 49
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: 50
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: 51
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: 52
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: 53
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: 54
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: 55
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: 56
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: 57
01-04-2021 дата публикации

EXHAUST GAS PURIFICATION CATALYST DEVICE

Номер: US20210094027A1
Автор: Chinzei Isao, NAKAHIGASHI Seiji, Oishi Shunsuke, OTA Takaya, Saito Yoshinori, SUZUKI Hiromasa
Принадлежит:

The exhaust gas purification catalyst device includes an upper layer which includes first carrier particles and rhodium, and a lower layer which includes second carrier particles, and the upper layer includes a rhodium enriched area in the range a, from the upstream end in the exhaust gas flow to 50% of the upper layer length, and a range b from the upper layer top surface to 18 μm in the depth direction. The rhodium enriched area contains at least 50% and less than 100% of all the rhodium in the upper layer. 2. The exhaust gas purification catalyst device according to claim 1 , wherein the range of the rhodium-rich portion in an exhaust gas flow direction is up to 30% of the length from the upper layer exhaust stream flow upstream side end.3. The exhaust gas purification catalyst device according to claim 2 , wherein the range of the rhodium-rich portion in the depth direction is up to 15 μm in the depth direction from the outermost surface of the upper layer.4. The exhaust gas purification catalyst device according to claim 1 , wherein a content of ceria in the upper layer is greater than 5% by mass to 25% by mass or less claim 1 , when the total mass of the first carrier particles in the upper layer is 100% by mass.5. The exhaust gas purification catalyst device according to claim 4 , wherein the content of ceria in the upper layer is 7% by mass to 15% by mass claim 4 , when the total mass of the first carrier particles in the upper layer is 100% by mass.6. The exhaust gas purification catalyst device according to claim 1 , wherein rhodium equal to 50% or more of the rhodium included in the rhodium-rich portion is in the range of up to 50% of the length of the rhodium-rich portion from the upstream side end of the exhaust gas flow.7. The exhaust gas purification catalyst device according to claim 1 , wherein the lower layer and the upper layer are present on a substrate.8. The exhaust gas purification catalyst according to claim 1 , wherein the lower layer ...

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Номер записи: 58
01-04-2021 дата публикации

EXHAUST GAS PURIFICATION APPARATUS

Номер: US20210095589A1
Автор: SASAKI Yasuyoshi, TAN Isao
Принадлежит: SUBARU CORPORATION

An exhaust gas purification apparatus includes a three-way catalyst. The three-way catalyst includes a downstream catalyst layer and an upstream catalyst layer. The downstream catalyst layer is to be provided in an exhaust pipe. The downstream catalyst layer contains a noble metal material containing at least one of Pd, Rh, or Pt, and an OSC material containing at least ceria. The upstream catalyst layer is to be provided in the exhaust pipe closer to an engine than the downstream catalyst layer is. The upstream catalyst layer contains the noble metal material and the OSC material. The upstream catalyst layer contains the ceria at a content less than a content of the ceria in the downstream catalyst layer. 1. An exhaust gas purification apparatus comprising a three-way catalyst , the three-way catalyst comprising:a downstream catalyst layer to be provided in an exhaust pipe, the downstream catalyst layer comprising a noble metal material containing at least one of Pd, Rh, or Pt, and an OSC material containing at least ceria; andan upstream catalyst layer to be provided in the exhaust pipe closer to an engine than the downstream catalyst layer is, the upstream catalyst layer comprising the noble metal material and the OSC material, the upstream catalyst layer containing the ceria at a content less than a content of the ceria in the downstream catalyst layer.2. The exhaust gas purification apparatus according to claim 1 , wherein the content of the ceria in the upstream catalyst layer is 0.33 times or more and 0.67 times or less as large as the content of the ceria in the downstream catalyst layer.3. The exhaust gas purification apparatus according to claim 1 , further comprising a NOstorage reduction catalyst to be provided in the exhaust pipe closer to a muffler than the downstream catalyst layer is claim 1 ,wherein the content of the ceria in the three-way catalyst is more than 0 g/L and 10 g/L or less.4. The exhaust gas purification apparatus according to claim 2 ...

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Номер записи: 59
05-04-2018 дата публикации

Ferrite as three-way catalyst for treatment of exhaust gas from vehicle engine

Номер: US20180094561A1
Автор: Chao-Ming Hsu, Chien-Kuei Chang, Yao-Jen Tu
Принадлежит: National Kaohsiung Univ of Applied Sciences

A kind of ferrite used as a three-way catalyst for treatment of exhaust gas from vehicle engines is revealed. Mono-nitrogen oxides (NO X ), carbon monoxide (CO) and hydrocarbons (HC) in exhaust gas from vehicle engines can be removed effectively by the three-way catalyst made from ferrite containing at least one substitutional metal.

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Номер записи: 60
06-04-2017 дата публикации

CATALYTIC CONVERTERS WITH AGE-SUPPRESSING CATALYSTS

Номер: US20170095795A1
Автор: Qi Gongshin, Xiao Xingcheng
Принадлежит:

A catalytic converter includes a catalyst. The catalyst includes a supporting oxide layer. The catalyst also includes platinum group metal (PGM) particles partially embedded in the supporting oxide layer such that a portion of each PGM particle is surrounded by the supporting oxide layer and an other portion of each PGM particle remains exposed. 1. A catalytic converter , comprising: a supporting oxide layer; and', 'platinum group metal (PGM) particles partially embedded in the supporting oxide layer such that a portion of each PGM particle is surrounded by the supporting oxide layer and an other portion of each PGM particle remains exposed., 'a catalyst including2. The catalytic converter as defined in wherein the catalyst further includes a gap separating the supporting oxide layer from the portion of each PGM particle that is surrounded by the supporting oxide layer.3. The catalytic converter as defined in wherein the supporting oxide layer is in direct contact with the portion of each PGM particle.4. The catalytic converter as defined in wherein the supporting oxide layer is 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.5. The catalytic converter as defined in claim 1 , further comprising a monolith substrate having a honeycomb structure claim 1 , wherein the catalyst is applied on interior surfaces of the honeycomb structure.6. A method of suppressing aging of platinum group metal (PGM) particles in a catalytic converter claim 1 , the method comprising:depositing the PGM particles on a sacrificial layer;depositing a supporting oxide layer on the PGM particles and on the sacrificial layer, thereby surrounding a portion of each of the PGM particles with the supporting oxide layer to partially embed the PGM particles; andremoving the sacrificial layer, thereby exposing an other ...

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Номер записи: 61
06-04-2017 дата публикации

Forming age-suppressing catalysts

Номер: US20170095807A1
Автор: Gongshin Qi, Ryan J. Day, Xingcheng Xiao
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

In an example of a method for forming a catalyst, a polymeric solution including a platinum group metal (PGM) is exposed to electrospinning to form carbon-based nanofibers containing PGM nanoparticles therein. An outer surface of the carbon-based nanofibers containing the PGM nanoparticles is coated with a metal oxide or a metal oxide precursor. The carbon-based nanofibers are selectively removed to form metal oxide nanotubes having PGM nanoparticles retained within a hollow portion thereof.

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Номер записи: 62
26-03-2020 дата публикации

DEVICE FOR TREATING EXHAUST GAS FROM ENGINE AND METHOD FOR MANUFACTURING SAID DEVICE

Номер: US20200094188A1
Автор: Tanaka Eijiro
Принадлежит: MAZDA MOTOR CORPORATION

A honeycomb-like porous filter for collecting PM in exhaust gas is provided in an exhaust gas passage of an engine. The exhaust gas flows from inflow side cells of the filter through pores of partition walls of the filter to outflow side cells A catalyst is supported on surfaces of the partition walls constituting the inflow side cells and on inner surfaces of the pores of the filter. The catalyst is supported on the surfaces of the partition walls more thickly than on the inner surfaces of the pores 1. A device for treating exhaust gas from an engine , the device comprisinga filter porous and provided in an exhaust gas passage of the engine and collecting particulate matter in exhaust gas,the exhaust gas passing through pores of the filter from surfaces of the filter and being discharged,a catalyst for purifying the exhaust gas being supported on the surfaces of the filter and inner surfaces of the pores, andthe catalyst being supported on the surfaces of the filter more thickly than on the inner surfaces of the pores.2. The device for treating exhaust gas from an engine of claim 1 , whereinan amount of the supported catalyst per unit area of the surfaces of the filter is 50 times or more and 500 times or less as much as an amount of the supported catalyst per unit area of the inner surfaces of the pores.3. The device for treating exhaust gas from an engine of claim 1 , the device further comprisinga catalytic converter provided on an upstream side of the filter in the exhaust gas passage and purifying the exhaust gas, whereinthe catalytic converter includes a catalyst which exhibits activity in oxidation reaction of unsaturated hydrocarbons whose number of carbon atoms is 6 to 9, andthe catalyst of the filter exhibits activity in oxidation reaction of saturated hydrocarbons whose number of carbon atoms is 5 or smaller.4. A method for manufacturing a device for treating exhaust gas from an engine claim 1 , the method comprising:a first step of immersing a filter, ...

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Номер записи: 63
08-04-2021 дата публикации

NOVEL THREE-ZONE TWO-LAYER TWC CATALYST IN GASOLINE WASTE GAS APPLICATIONS

Номер: US20210101139A1
Автор: Dong Wenjie, JI Hongyu, QIAO Dongsheng, WAN Yaping
Принадлежит: Johnson Matthey (Shanghai) Chemical LTD.

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, an outlet end with an axial length L; an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet palladium component; an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component; and wherein the outlet catalyst layer overlaps with the inlet catalyst layer. 1. A catalyst article for treating exhaust gas comprising:a substrate comprising an inlet end, an outlet end with an axial length L;an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet palladium component;an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component; andwherein the outlet catalyst layer overlaps with the inlet catalyst layer.2. The catalyst article of claim 1 , wherein the inlet catalyst layer extends for 50 to 99 percent of the axial length L.3. The catalyst article of claim 1 , wherein the outlet catalyst layer extends for 50 to 99 percent of the axial length L.4. The catalyst article of claim 1 , wherein the outlet catalyst layer overlaps with the inlet catalyst layer for 5 to 90 percent of the axial length L.5. The catalyst article of claim 1 , wherein the outlet catalyst layer overlaps with the inlet catalyst layer for 40 to 80 percent of the axial length L.6. The catalyst article of claim 1 , wherein the inlet catalyst layer is essentially free of PGM metals other than the inlet palladium component.7. The catalyst article of claim 1 , wherein the inlet layer comprises up to 300 g/ftof ...

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Номер записи: 64
08-04-2021 дата публикации

METHOD AND COMPUTER PROGRAM PRODUCT FOR DIAGNOSING A PARTICLE FILTER

Номер: US20210102487A1
Автор: Baumann Thomas, Lian Yunjie
Принадлежит:

The invention relates to a method and a computer program product for identifying an absent or defective particle filter in an exhaust gas treatment system of an internal combustion engine, in particular a petrol engine, wherein in order to monitor the particle filter a pressure difference between the inlet and the outlet of the particle filter is measured and evaluated. In that context, it is provided that, depending on the operating parameters of the internal combustion engine and/or of the exhaust gas treatment system, a correlation of the measured pressure difference across the particle filter compared to an expected pressure difference for an intact reference particle filter, or a correlation of the gradient, with respect to time, of the measured pressure difference to an expected gradient, with respect to time, of the expected pressure difference for an intact reference particle filter, is determined, and that, in the event of high correlation it is concluded that a particle filter is present and intact, and in the event of low correlation it is concluded that a particle filter is absent or defective. The method makes it possible to identify an absent or defective particle filter under many operating conditions of the internal combustion engine, even in the case of very low absolute pressure differences, as is in particular the case with petrol particle filters. 110-. (canceled)111316101319131913101619191919131313. A method for detecting a removed or defective particle filter () in an exhaust gas after-treatment system () of an internal combustion engine () , wherein in order to monitor the particle filter () a differential pressure Δp () between the inlet and the outlet of the particle filter () is measured and evaluated , wherein a correlation of the measured differential pressure Δp () across the particle filter () with an expected differential pressure Δp* is evaluated for an intact reference particle filter as a function of the operating parameters of the ...

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Номер записи: 65
02-06-2022 дата публикации

EXHAUST GAS PURIFICATION CATALYST AND PRODUCTION METHOD THEREFOR

Номер: US20220168710A1
Автор: AKITA Shingo, ENDO Yoshinori, KURIHARA Hiroki, NAGAI Yusuke
Принадлежит:

A substrate () of an exhaust gas purification catalyst () includes inflow-side cells (), outflow-side cells (), and porous partition walls () each separating the inflow-side cell and the outflow-side cell. Catalyst portions () are provided on surfaces of the partition walls that each face the inflow-side cell and/or surfaces of the partition walls that each face the outflow-side cell. In a cross section vertical to an exhaust gas flow direction, the percentage of the total area of voids, each void satisfying the expression L/{(πS)}≤1.1, wherein L is the perimeter of the void in the cross section and S is the area of the void in the cross section, is from 3 to 10% based on the apparent area of the catalyst portion present on the partition wall. 1. An exhaust gas purification catalyst comprising: a substrate , and catalyst portions provided in the substrate ,the catalyst portions including a plurality of voids; inflow-side cells, each inflow-side cell being a space having an open end on an inflow side thereof and a closed end on an outflow side thereof in an exhaust gas flow direction;', 'outflow-side cells, each outflow-side cell being a space having a closed end on an inflow side thereof and an open end on an outflow side thereof in the exhaust gas flow direction; and', 'porous partition walls, each porous partition wall separating the inflow-side cell and the outflow-side cell from each other;, 'the substrate includingthe catalyst portions being provided on surfaces of the partition walls that each face the inflow-side cell and/or surfaces of the partition walls that each face the outflow-side cell;wherein{'sup': '1/2', 'in a cross section vertical to the exhaust gas flow direction, the percentage of a total area of the voids, each void satisfying the expression L/{2(πS)}≤1.1, wherein L is a perimeter of the void in the cross section and S is an area of the void in the cross section, is from 3 to 10% based on an apparent area of the catalyst portion present on the ...

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Номер записи: 66
02-06-2022 дата публикации

COMBUSTION SYSTEM

Номер: US20220170402A1
Автор: HARUTA Masatake, HATA Shinichi, INOMATA Yusuke, KIYONAGA Eiji, MORITA Keiichiro, Murayama Toru, Yoshida Kazuhiro
Принадлежит:

Provided is a combustion system using a catalyst having better denitration efficiency at low temperatures, during a selective catalytic reduction reaction in which ammonia is used as a reducing agent. 1. A combustion system comprising:a combustion device which combusts a fuel;an exhaust channel through which exhaust gas generated by the fuel combusting in the combustion device flows;a dust collector which is disposed in the exhaust channel, and collects ash dust in the exhaust gas; anda denitration device which is disposed in the exhaust channel, and removes nitrogen oxides from the exhaust gas by way of a denitration catalyst,wherein the denitration device is disposed on a downstream side of the dust collector in the exhaust channel, andwherein the denitration catalyst contains vanadium oxide, has a carbon content of at least 0.05 wt %, and has a defect site at which an oxygen deficiency occurs in a crystal structure.2. The combustion system according to claim 1 , wherein the combustion system further includes an air preheater disposed in the exhaust channel claim 1 , and recovers heat from the exhaust gas claim 1 , andwherein the air preheater is disposed on an upstream side of the dust collector.3. A combustion system comprising:a combustion device which combusts a fuel;an exhaust channel through which exhaust gas generated by the fuel combusting in the combustion device flows;an air preheater which is disposed in the exhaust channel, and recovers heat from the exhaust gas; anda denitration device which is disposed in the exhaust channel, and removes nitrogen oxides from the exhaust gas by way of a denitration catalyst,wherein the denitration device is disposed on a downstream side of the air preheater in the exhaust channel, andwherein the denitration catalyst contains vanadium oxide, has a carbon content of at least 0.05 wt %, and has a defect site at which an oxygen deficiency occurs in a crystal structure.4. A combustion system comprising:an internal ...

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Номер записи: 67
11-04-2019 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20190105637A1
Автор: OHASHI Tatsuya, OHISHI Shunsuke, OTA Takaya, Saito Yoshinori, SUZUKI Hiromasa
Принадлежит:

The exemplary embodiments relate to an exhaust gas purification catalyst that is excellent in terms of HC purification capacity and warm-up performance. Such exhaust gas purification catalyst comprises a substrate and a catalyst coating layer formed on the surface of the substrate, wherein the catalyst coating layer comprises an upper and lower layer comprising a lower layer being closer to the surface of the substrate and an upper layer being relatively remote from the surface of the substrate, the upper layer of the catalyst coating layer comprises Rh, Pd, and a carrier, the upper layer of the catalyst coating layer comprises an uppermost surface Pd layer having a Pd concentration relatively higher than that in any other portion in the upper layer within an area extending over a length of 20 mm or more from one end on the upstream side in the downstream direction on the surface of the upper layer, the lower layer of the catalyst coating layer comprises at least one noble metal selected from Pd and Pt and a carrier, and 60% or more of Pd by mass in the uppermost surface Pd layer exists in a layer up to 50% of the upper layer in a thickness direction from the surface of the uppermost surface Pd layer being relatively remote from the surface of the substrate. 1. An exhaust gas purification catalyst comprising a substrate and a catalyst coating layer formed on the surface of the substrate ,wherein the catalyst coating layer comprises an upper and lower layer comprising a lower layer being closer to the surface of the substrate and an upper layer being relatively remote from the surface of the substrate,the upper layer of the catalyst coating layer comprises Rh, Pd, and a carrier,the upper layer of the catalyst coating layer comprises an uppermost surface Pd layer having a Pd concentration relatively higher than that in any other portion in the upper layer within an area extending over a length of 20 mm or more from one end on the upstream side in the downstream ...

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Номер записи: 68
02-04-2020 дата публикации

NOVEL TWC CATALYSTS FOR GASOLINE EXHAUST GAS APPLICATIONS

Номер: US20200102868A1
Автор: FUJIMORI Yuichi, Hayashi Yoshitaka, HIROTA Tomotaka, KIM Sungwook, SAIKI Shintaro, TANIKAWA Kenji, Yamada 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 comprising an inlet end, an outlet end with an axial length L; an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet rhodium component and an inlet platinum component; an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component. 1. A catalyst article for treating exhaust gas comprising:a substrate comprising an inlet end, an outlet end with an axial length L;an inlet catalyst layer beginning at the inlet end and extending for less than the axial length L, wherein the inlet catalyst layer comprises an inlet rhodium component and an inlet platinum component;an outlet catalyst layer beginning at the outlet end and extending for less than the axial length L, wherein the outlet catalyst layer comprises an outlet rhodium component.2. The catalyst article of claim 1 , wherein the rhodium loading in the inlet catalyst layer is no less than the rhodium loading in the outlet catalyst layer.3. The catalyst article of claim 2 , wherein the overall PGM loading in the inlet catalyst layer is greater than the overall PGM loading in the outlet catalyst layer.4. The catalyst article of claim 1 , wherein the inlet catalyst layer extends for 20 to 90 percent of the axial length L.5. The catalyst article of claim 1 , wherein the outlet catalyst layer extends for 20 to 90 percent of the axial length L.6. The catalyst article of claim 1 , wherein the total length of the outlet catalyst layer and the inlet catalyst layer is from 90 percent to 180 percent of the axial length L.7. The catalyst article of wherein the ratio of the inlet rhodium component and the outlet rhodium component is from 20:1 to 1:1.8. ...

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Номер записи: 69
09-06-2022 дата публикации

Catalyst Material

Номер: US20220176351A1
Автор: AONO Norihiko, FUJITA Naoto, Narita Keiichi, Satsuma Atsushi, Tran Mai Huong
Принадлежит:

The present invention provides an exhaust gas purification catalyst having an excellent purification performance for purifying chemically stable methane. A catalyst material includes a carrier formed of alumina and a catalyst formed of at least one of palladium and a palladium oxide directly supported on the carrier . A specific surface area of the carrier is preferably 20 m/g or more 90 m/g or less. In one preferred aspect, a proportion of Pd(100) and PdO(101) in crystal planes of the catalyst at a joint surface between the catalyst and the carrier is 20 number % or more. 1. A catalyst material used for purifying methane , comprising:a carrier formed of alumina; anda catalyst formed of at least one of palladium and a palladium oxide directly supported by the carrier,wherein{'sup': 2', '2, 'a specific surface area of the carrier is 20 m/g or more and 90 m/g or less.'}2. The catalyst material according to claim 1 , whereina proportion of Pd(100) and PdO(101) in crystal planes of the catalyst at a joint surface between the catalyst and the carrier is 20 number % or more.3. The catalyst material according to claim 1 , whereina proportion of θ(001), θ(111), and α(104) in crystal planes of the carrier at a joint surface between the catalyst and the carrier is 30 number % or more.4. The catalyst material according to claim 1 , whereinan average particle diameter of the catalyst is 20 nm or less.5. The catalyst material according to claim 1 , whereina supported ratio of the catalyst to a total amount of the carrier and the catalyst is 10 mass % or less.6. The catalyst material according to claim 1 , whereinthe catalyst material is used for purifying exhaust gas emitted from an internal combustion engine using natural gas as fuel.7. The catalyst material according to claim 2 , whereina proportion of θ(001), θ(111), and α(104) in crystal planes of the carrier at a joint surface between the catalyst and the carrier is 30 number % or more.8. The catalyst material according to ...

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Номер записи: 70
26-04-2018 дата публикации

Catalytic Converter and Method of Controlling Exhaust Emission

Номер: US20180112570A1
Автор: Chun Soon Jang
Принадлежит: Hyundai Motor Co

The present disclosure relates to an improved catalytic converter capable of significantly reducing emissions by reducing the activation time of a catalytic device thereby improving emissions reduction performance, and an exhaust emission emissions reduction control method using the improved catalytic converter. The improved catalytic converter includes: a housing and two or more catalyst substrates disposed inside the housing, wherein the two or more catalyst substrates are separated inside the housing along a longitudinal direction, and the two or more catalyst substrates have a different diameter and a different volume.

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Номер записи: 71
27-04-2017 дата публикации

METHOD FOR PRODUCING METAL EXCHANGED METALLO-ALUMINOPHOSPHATES BY SOLID-STATE ION EXCHANGE AT LOW TEMPERATURES

Номер: US20170113212A1
Автор: Janssens Ton V.W., Vennestrøm Peter N.R.
Принадлежит: Haldor Topsoe A/S

Method for the preparation of a metal exchanged crystalline microporous metalloaluminophosphate or mixtures containing metal exchanged microporous metalloaluminophosphates materials comprising the steps of providing a dry mixture containing a) one or more metalloaluminophosphates starting materials that exhibit ion exchange capacity, and b) one or more metal compounds; heating the mixture in a gaseous atmosphere containing ammonia to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the crystalline microporous material; and obtaining the metal-exchanged microporous metalloaluminophosphate material or mixtures containing the metal-exchanged microporous metalloaluminophosphate material. 1. Method for the preparation of a metal exchanged crystalline microporous metalloaluminophosphate or mixtures containing metal exchanged microporous metalloaluminophosphates materials comprising the steps ofproviding a dry mixture containinga) one or more metalloaluminophosphates starting materials that exhibit ion exchange capacity andb) one or more metal compounds;heating the mixture in a gaseous atmosphere containing ammonia to a temperature and for a time sufficient to initiate and perform a solid state ion exchange of ions of the metal compound and ions of the crystalline microporous material;and obtaining the metal-exchanged microporous metalloaluminophosphate material or mixtures containing the metal-exchanged microporous metalloaluminophosphate material.2. Method according to claim 1 , wherein the one or more metalloaluminophosphate starting materials contain one or more metals chosen from the group silicon claim 1 , titanium claim 1 , tin claim 1 , zinc claim 1 , magnesium claim 1 , manganese claim 1 , cobalt or iron.3. Method according to claim 1 , where the one or more metalloaluminophosphate starting materials have the framework code of CHA claim 1 , AEI claim 1 , AFI claim 1 , AEL claim 1 , ...

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Номер записи: 72
18-04-2019 дата публикации

TWC CATALYSTS FOR GASOLINE EXHAUST GAS APPLICATIONS WITH IMPROVED THERMAL DURABILITY

Номер: US20190111389A1
Автор: CAMM Kenneth, Chang Hsiao-Lan, Chen Hai-Ying, HALES Michael, Koo Kwangmo
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 catalytic region on the substrate; wherein the catalytic region comprises a first platinum group metal (PGM) component, an oxygen storage component (OSC) material, a rare earth metal oxide, and an inorganic oxide; and wherein the rare earth metal oxide has an average diameter (d) of more than 100 nm. 1. A catalyst article for treating exhaust gas comprising:a substrate; anda catalytic region on the substrate;wherein the catalytic region comprises a first platinum group metal (PGM) component, an oxygen storage component (OSC) material, a rare earth metal oxide, and an inorganic oxide; and{'sub': '50', 'wherein the rare earth metal oxide has an average diameter (d) of more than 100 nm.'}2. The catalyst article of claim 1 , wherein the first PGM component is selected from the group consisting of platinum claim 1 , palladium claim 1 , rhodium claim 1 , and a mixture thereof.3. The catalyst article of claim 1 , wherein the first PGM component is palladium.4. The catalyst article of claim 3 , wherein the palladium loading is ranged from 0.03-10 wt. % claim 3 , based on the total weight of the catalytic region.5. The catalyst article of claim 1 , wherein the OSC material is selected from the group consisting of cerium oxide claim 1 , a ceria-zirconia mixed oxide claim 1 , and an alumina-ceria-zirconia mixed oxide.6. The catalyst article of claim 5 , wherein the OSC material is a ceria-zirconia mixed oxide.7. The catalyst article of claim 1 , wherein the inorganic oxide is selected from the group consisting of alumina claim 1 , lanthanide-stabilized alumina claim 1 , alkaline earth stabilized alumina claim 1 , silica claim 1 , aluminosilicates claim 1 , a magnesia/alumina composite oxide claim 1 , titania claim 1 , niobia claim 1 , tantalum oxides claim 1 , neodymium oxide claim 1 , yttrium ...

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Номер записи: 73
13-05-2021 дата публикации

COATED WALL-FLOW FILTER

Номер: US20210138447A1
Автор: DEIBEL Naina, FOERSTER Martin, KOCH Juergen, OLTERSDORF Antje, ROESCH Martin
Принадлежит: UMICORE AG & CO. KG

The present invention relates to a catalytically coated wall-flow filter, to a method for the production thereof and to the use thereof in order to reduce s harmful exhaust gases of an internal combustion engine. 1. Catalytically active wall-flow filter for reducing the harmful substances in the exhaust gas of an internal combustion engine , wherein this dry filter coated with catalytically active material in the wall is selectively impinged on its inlet side with a dry powder/gas aerosol which has a high-melting compound in such a way that the powder is deposited in the pores of the filter walls and does not form a continuous layer on the walls of the filter.2. Catalytically active wall-flow filter according to claim 1 ,characterized in thatthe aerosol is a mixture of air and a high-melting metal oxide, metal sulfate, metal phosphate, metal carbonate, or metal hydroxide powder.3. Catalytically active wall-flow filter according to claim 1 ,characterized in thatthe catalytically active coating of the filter is selected from the group consisting of three-way catalyst, SCR catalyst, nitrogen oxide storage catalyst, oxidation catalyst, soot-ignition coating, hydrocarbon storage.4. Catalytically active wall-flow filter according to claim 3 ,characterized in thatthe catalytically active coating of the filter consists of at least one metal-ion-exchanged zeolite, cerium/zirconium mixed oxide, aluminum oxide and palladium, rhodium, or platinum, or combinations of these noble metals.5. Catalytically active wall-flow filter according to claim 1 ,characterized in thatsaid filter has a loading with the catalytic coating of 20 g/l to 200 g/l based on the volume of the filter.6. Catalytically active wall-flow filter according to claim 1 ,characterized in thatthe ratio of average particle diameter (measured according to the most recent ISO 13320 on the date of application) d50 in the dry aerosol and the average pore diameter of the filter after coating with washcoat (measured ...

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Номер записи: 74
13-05-2021 дата публикации

Low-pressure egr system with turbo bypass

Номер: US20210140394A1
Автор: Jaroslaw Kierat, Michael Fischer, Philipp Kreutziger
Принадлежит: TENNECO GMBH

The disclosure relates to a gasoline engine comprising an exhaust gas line which can be connected to an exhaust manifold of the gasoline engine, an intake line which can be connected to an intake manifold of the gasoline engine, a charge air compressor which is arranged in the intake line, and a turbine which is arranged in the exhaust gas line. The exhaust gas line has at least one bypass line with a bypass throttle valve, said line branching off from the exhaust gas line at a branch upstream of the turbine and branching back into the exhaust gas line at an opening downstream of the turbine. At least one exhaust gas recirculation line with an EGR throttle valve is provided, said line branching off from the exhaust gas line at a branch and opening into the intake line at an opening, wherein a coupling line with a first node point and a second node point is provided, the bypass line and the EGR line being combined in some sections in said coupling line; at least one particle filter is arranged in the coupling line; and the first node point is arranged downstream of the branch and downstream of the branch.

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Номер записи: 75
23-04-2020 дата публикации

DELAFOSSITE-TYPE OXIDE FOR EXHAUST GAS PURIFICATION CATALYST, AND EXHAUST GAS PURIFICATION CATALYST USING SAME

Номер: US20200122129A1
Автор: Iwakura Hironori, IWASHINA Katsuya, Kato Sumio, Moriya Toshiharu, Ogasawara Masataka
Принадлежит:

In relation to a Cu-based delafossite-type oxide that is effective as an exhaust gas purification catalyst, Cu is placed in a high catalytic activity low-valence state, whereby a novel Cu-based delafossite-type oxide having higher activity than in the past is provided. Proposed is a delafossite-type oxide for an exhaust gas purification catalyst that is represented by a general formula ABO, wherein Cu and Ag are contained in the A site of the general formula, one or two or more elements selected from the group consisting of Mn, Al, Cr, Ga, Fe, Co, Ni, In, La, Nd, Sm, Eu, Y, V, and Ti are contained in the B site of the general formula, and Ag is contained at a ratio of 0.001 at. % or more and less than 20 at. % in the A site of the general formula. 1. A delafossite-type oxide for an exhaust gas purification catalyst , represented by a general formula ABO ,wherein Cu and Ag are comprised in the A site of the general formula, one or two or more elements selected from the group consisting of Mn, Al, Cr, Ga, Fe, Co, Ni, In, La, Nd, Sm, Eu, Y, V, and Ti are comprised in the B site of the general formula, and Ag is comprised at a ratio of 0.001 at. % or more and less than 20 at. % in the A site of the general formula.2. The delafossite-type oxide for an exhaust gas purification catalyst according to claim 1 , wherein one or two or more elements selected from the group consisting of Mn claim 1 , Al claim 1 , Cr claim 1 , and Ga are comprised in the B site of the general formula.3. The delafossite-type oxide for an exhaust gas purification catalyst according to claim 1 , wherein only Mn is comprised in the B site of the general formula claim 1 , or Mn and one or two or more elements selected from the group consisting of Al claim 1 , Cr claim 1 , and Ga are comprised in the B site of the general formula.4. The delafossite-type oxide for an exhaust gas purification catalyst according to claim 1 , wherein Mn and one or two or more elements selected from the group consisting of ...

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Номер записи: 76
01-09-2022 дата публикации

TUBULAR MEMBER FOR EXHAUST GAS TREATMENT DEVICE AND EXHAUST GAS TREATMENT DEVICE USING THE TUBULAR MEMBER, AND METHOD OF MANUFACTURING TUBULAR MEMBER FOR EXHAUST GAS TREATMENT DEVICE

Номер: US20220275745A1
Автор: SHIBAGAKI Yukinari, TANAKA Daichi
Принадлежит: NGK Insulators, Ltd.

A tubular member for an exhaust gas treatment device according to at least one embodiment of the present invention includes: a tubular main body made of a metal; and an insulating layer formed at least on an inner peripheral surface of the tubular main body. The insulating layer contains glass, and the glass has a content of an alkali metal element of 1,000 ppm or less. 1. A tubular member for an exhaust gas treatment device , comprising:a tubular main body made of a metal; andan insulating layer formed at least on an inner peripheral surface of the tubular main body,wherein the insulating layer contains glass, andwherein the glass has a content of an alkali metal element of 1,000 ppm or less.2. The tubular member for an exhaust gas treatment device according to claim 1 , wherein the tubular main body contains chromium.3. The tubular member for an exhaust gas treatment device according to claim 1 , wherein the alkali metal element contains one or more kinds of elements selected from sodium claim 1 , potassium claim 1 , and a combination thereof.4. The tubular member for an exhaust gas treatment device according to claim 1 , wherein the tubular main body is made of stainless steel.5. The tubular member for an exhaust gas treatment device according to claim 1 , wherein the insulating layer has a thickness of from 30 μm to 800 μm.6. The tubular member for an exhaust gas treatment device according to claim 1 , wherein the insulating layer has a pressing deformation temperature of 600° C. or more claim 1 , which is defined as follows:the pressing deformation temperature is a temperature at which the insulating layer is deformed by 10% with respect to a thickness of the insulating layer in a thickness direction of the insulating layer when the insulating layer is heated at a temperature increase rate of 10° C./min while being pressed at a pressure of 0.1 MPa through use of an alumina needle of 1 mmΦ.7. The tubular member for an exhaust gas treatment device according to ...

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Номер записи: 77
01-09-2022 дата публикации

TUBULAR MEMBER FOR EXHAUST GAS TREATMENT DEVICE AND EXHAUST GAS TREATMENT DEVICE USING THE TUBULAR MEMBER, AND METHOD OF MANUFACTURING TUBULAR MEMBER FOR EXHAUST GAS TREATMENT DEVICE

Номер: US20220275746A1
Автор: SHIBAGAKI Yukinari, TANAKA Daichi
Принадлежит: NGK Insulators, Ltd.

A tubular member for an exhaust gas treatment device according to at least one embodiment of the present invention includes: a tubular main body made of a metal; and an insulating layer formed at least on an inner peripheral surface of the tubular main body. The insulating layer contains glass, the glass contains barium, and the glass has a content of barium of mol % or more. 1. A tubular member for an exhaust gas treatment device , comprising:a tubular main body made of a metal; andan insulating layer formed at least on an inner peripheral surface of the tubular main body,wherein the insulating layer contains glass, andwherein the insulating layer satisfies at least one of the following items (1) and (2) after the following peeling test:(1) an element derived from the insulating layer is present on the inner peripheral surface of the tubular main body; and(2) an element derived from the tubular main body is present in the insulating layer,where the peeling test involves repeating, until the insulating layer is peeled, an operation of placing the tubular member for an exhaust gas treatment device alternately in an environment of 900° C. and an environment of 150° C. in accordance with JIS H 8451:2008.2. The tubular member for an exhaust gas treatment device according to claim 1 ,wherein the glass contains barium, andwherein the glass has a content of barium of 5 mol % or more.3. The tubular member for an exhaust gas treatment device according to claim 2 , wherein the glass further contains one of lanthanum claim 2 , zinc claim 2 , and a combination thereof.4. The tubular member for an exhaust gas treatment device according to claim 3 , wherein the glass has a content of lanthanum of 2 mol % or more.5. The tubular member for an exhaust gas treatment device according to claim 3 , wherein the glass has a content of zinc of 3 mol % or more.6. A tubular member for an exhaust gas treatment device claim 3 , comprising:a tubular main body made of a metal; andan insulating ...

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Номер записи: 78
03-06-2021 дата публикации

Exhaust gas purification system

Номер: US20210164375A1
Автор: Daisuke Shimoyama, Naoto Nagata
Принадлежит: Toyota Motor Corp

There is provided an exhaust gas purification system that allows efficient purification of NOx present in exhaust gas emitted from an internal combustion engine. The exhaust gas purification system of the disclosure comprises a first exhaust gas purification device that purifies exhaust gas emitted from an internal combustion engine, wherein the atmosphere alternately switches between a reducing agent-excess atmosphere and an oxidizing agent-excess atmosphere with respect to the stoichiometric atmosphere, and a second exhaust gas purification device that further purifies the exhaust gas that has been purified by the first exhaust gas purification device, wherein the first exhaust gas purification device has a three-way catalyst, and the second exhaust gas purification device has an exhaust gas purifying catalyst that comprises an AMn2O4 spinel-type oxide support (A=Mg, Zn or Li) on which a precious metal is supported.

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Номер записи: 79
07-08-2014 дата публикации

MIXED PHASE OXIDE CATALYSTS

Номер: US20140219878A1
Автор: Hao Xianghong, McCool Geoffrey, Srivastava Deepak, Yavuz Bulent
Принадлежит: SHUBIN, INC.

An emission control catalyst for treating an engine exhaust includes non-precious metal group (“NPGM”) mixed phase oxide catalyst having a mullite phase containing optionally in close contact with other metal oxides. The mixed phase catalyst may be included in one or more layers or zones of a multi-layered or multi-zoned emission control catalyst and optionally in combination with precious metal catalysts such as Pt, Pd and Au. 1. An engine exhaust catalyst , comprising:a fluorite phase containing a cerium oxide; anda spinel phase containing a metal oxide.2. The catalyst of claim 1 , wherein the metal oxide includes one more transition metals.3. The catalyst of claim 2 , wherein the metal oxide is selected from the group consisting of cobalt oxide and manganese oxide.4. The catalyst of claim 2 , wherein the metal oxide further includes a dopant selected from the group consisting of alkali metals claim 2 , alkaline earth metals claim 2 , and combinations thereof.56.-. (canceled)8. The catalyst of claim 7 , wherein x+a=0 claim 7 , such that the catalyst has the general formula{'br': None, 'sub': 1−x', 'y+b', 'z−y', 's, 'CeBMO.'}9. The catalyst of claim 7 , wherein M is selected from Cobalt or Manganese.10. The catalyst of claim 9 , wherein B is selected from the group consisting of barium claim 9 , cesium claim 9 , strontium claim 9 , and combinations thereof.11. The catalyst of claim 10 , wherein A is selected from the group consisting of samarium claim 10 , zirconium claim 10 , tin claim 10 , yttrium claim 10 , Gadolinium and combinations thereof.12. The catalyst of claim 7 , wherein the catalyst has three phases and further comprising a mullite phase.14. The catalyst of claim 13 , where the mullite phase in the general formula is selected from the group consisting of AMO claim 13 , AMO claim 13 , and AMO.15. The catalyst of claim 14 , wherein the metal M is in M or M states.16. The catalyst of claim 14 , whereinM is selected from the group consisting of Mn, Fe, Co, ...

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Номер записи: 80
07-08-2014 дата публикации

Multi-Component Filters For Emissions Control

Номер: US20140219880A1
Автор: Boorse R. Samuel
Принадлежит: BASF CORPORATION

Catalytic articles, systems and methods for treating exhaust gas streams are described. A catalytic article comprising a wall flow filter having gas permeable walls, a hydrolysis catalyst, an optional soot oxidation catalyst, a selective catalytic reduction catalyst permeating the walls, an ammonia oxidation catalyst and an oxidation catalyst to oxidize CO and hydrocarbons is described. Methods of treating exhaust gas streams comprising soot, an ammonia precursor such as urea, ammonia, NO, CO and hydrocarbons are also provided. 1. A catalytic article to remove emissions from a gas stream containing soot , ammonia , an ammonia precursor , NO , CO and hydrocarbons , the article comprising:a wall-flow filter for trapping soot in the gas stream, the filter having an inlet end and an outlet end defining an overall length, gas permeable walls having a thickness formed into a plurality of axially extending inlet channels and outlet channels, each inlet channel having inlet walls, an open inlet end and an outlet plug at the outlet end, each outlet channel having outlet walls, inlet plugs at the inlet end and an open outlet end, with each inlet channel having adjacent outlet channels;{'sub': x', '2, 'a selective catalytic reduction catalyst permeating the gas permeable walls, the selective catalytic reduction catalyst promoting the conversion of NOin the gas stream to Nin the presence of excess oxygen;'}{'sub': '2', 'an ammonia oxidation catalyst coating a length of the outlet walls of the outlet channels that promotes the selective oxidation of ammonia to Nin the gas stream; and'}{'sub': '2', 'an oxidation catalyst coated on a portion of the outlet walls of the outlet channels extending from the outlet end toward the inlet end that promotes the oxidation of CO and hydrocarbons to CO, wherein there is substantially no overlap of the oxidation catalyst on the ammonia catalyst.'}2. The catalytic article of claim 1 , wherein the ammonia oxidation catalyst extends up to about 50 ...

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Номер записи: 81
08-09-2022 дата публикации

Exhaust gas purification catalyst, method of purifying exhaust gas, and method of manufacturing exhaust gas purification catalyst

Номер: US20220280921A1
Автор: Franz Dornhaus, Yusuke KOITO
Принадлежит: Umicore Shokubai Japan Co Ltd

A three-dimensional structure ( 10 ); and a catalytic component ( 100 ) that contains a precious metal complex ( 22 ) containing platinum and palladium and a porous material ( 21 ), which is supported on the three-dimensional structure ( 10 ); where the surface accumulation C (Pt) of the platinum is 0.00070 or more to 0.01000 or less, the surface accumulation C (Pd) of the palladium is 0.00800 or more to 0.10000 or less, the surface accumulation C (Pt) is expressed by C (Pt)=P XPS (Pt)/(d 2 ×P TEM (Pt)×0.01), and the surface accumulation C (Pd) is expressed by C (Pd)=P XPS (Pd)/(d 2 ×P TEM (Pd)×0.01).

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Номер записи: 82
30-04-2020 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20200129963A1
Автор: HIRAO Tetsuhiro, Onoe Ryota, SAWADA KAZUNARI
Принадлежит: CATALER CORPORATION

An exhaust gas purification catalyst having a substrate having a wall flow structure, and a catalyst layer. The catalyst layer has: an A section provided in the interior of the partition wall, along an extension direction X of the partition wall, from an exhaust gas inflow end section; a C section provided in the interior of the partition wall, along the extension direction X of the partition wall, from an exhaust gas outflow end section; and a B section disposed between the A section and the C section in the extension direction X of the partition wall, and provided over the surface of the partition wall on the side in contact with the inlet cell, the interior of the partition wall, and the surface of the partition wall on the side in contact with the outlet cell. 1. An exhaust gas purification catalyst which is disposed in an exhaust passage of an internal combustion engine and which purifies exhaust gas emitted by the internal combustion engine , the exhaust gas purification catalyst comprising:a substrate having a wall flow structure including an inlet cell in which an exhaust gas inflow end section opens, an outlet cell in which an exhaust gas outflow end section opens, and a porous partition wall that separates the inlet cell from the outlet cell; anda catalyst layer provided in the substrate, and which contains a metal catalyst,wherein the catalyst layer includesan A section provided in the interior of the partition wall along the extension direction of the partition wall from the exhaust gas inflow end section;a C section provided in the interior of the partition wall along the extension direction of the partition wall from the exhaust gas outflow end section; anda B section disposed between the A section and the C section in the extension direction of the partition wall, the B section being provided over the surface of the partition wall on the side in contact with the inlet cell, the interior of the partition wall, and the surface of the partition wall on ...

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Номер записи: 83
08-09-2022 дата публикации

System comprising vehicular compression ignition engine and an emissions control device comprising an electrically heatable element

Номер: US20220282650A1
Автор: Andrew Chiffey, Daniel Hatcher, David Bergeal, François Moreau, Paul Phillips
Принадлежит: JOHNSON MATTHEY PLC

A system ( 2 ) comprising (i) a vehicular compression ignition engine ( 1 ) comprising one or more engine cylinders and one or more electronically-controlled fuel injectors therefor; (ii) an exhaust line ( 3 ) for the engine comprising: a first emissions control device ( 5 ) comprising a first honeycomb substrate, which comprises a hydrocarbon adsorbent component; and a second emissions control device ( 7 ) comprising an electrically heatable element ( 7 a ) and a catalysed second honeycomb substrate ( 7 b ), which comprises a rhodium-free platinum group metal (PGM) comprising platinum, wherein the electrically heatable element ( 7 a ) is disposed upstream from the catalysed second honeycomb substrate ( 7 b ) and wherein both the electrically heatable element ( 7 a ) and the catalysed second honeycomb substrate ( 7 b ) are disposed downstream from the first honeycomb substrate; a third emissions control device ( 22 ), which is a third honeycomb substrate comprising an ammonia-selective catalytic reduction catalyst disposed downstream from the second emissions control device ( 7 ); and one or more temperature sensors located: upstream of the electrically heatable element and/or upstream of the first honeycomb substrate; and between the electrically heatable element ( 7 a ) and the catalysed second honeycomb substrate ( 7 b ); and (iii) an engine control unit ( 20 ) comprising a central processing unit pre-programmed, when in use, to control both a heating activation state of the electrically heatable element ( 7 a ); an injection timing strategy of the one or more electronically-controlled fuel injector to increase the temperature of at least the first emissions control device following key-on/cold-starting a vehicle comprising the system, wherein the one or more temperature sensors are electrically connected to the engine control unit for feedback control in the system.

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Номер записи: 84
30-04-2020 дата публикации

CATALYTIC DEVICE AND EXHAUST GAS PURIFICATION SYSTEM

Номер: US20200131960A1
Автор: SAKUMA Tetsuya
Принадлежит: TOYOTA JIDOSHA KABUSHIKI KAISHA

The present disclosure is intended to improve HC purification performance of a catalytic device arranged in an exhaust passage of an internal combustion engine in a more suitable manner. A microwave absorber is distributed over a predetermined part in a catalytic layer of the catalytic device which is irradiated with a microwave in the exhaust passage of the internal combustion engine. Then, in the predetermined part in the catalytic layer, a content ratio of a first catalytic material, which is one of two kinds of catalytic materials of which HC purification performance is higher than that of the other, is higher than a content ratio of the first catalytic material in the other portion than the predetermined part in the catalytic layer. 1. A catalytic device which is arranged in an exhaust passage of an internal combustion engine , and which is irradiated with a microwave in the exhaust passage ,the catalytic device having a catalytic layer configured to include at least two kinds of catalytic materials that are different from each other in HC purification performance, and a microwave absorber to generate heat by absorbing the microwave, whereinthe microwave absorber is distributed over a predetermined part in the catalytic layer; andin the predetermined part in the catalytic layer, a content ratio of a first catalytic material, which is one of the two kinds of catalytic materials of which HC purification performance is higher than that of the other, is higher than a content ratio of the first catalytic material in the other portion than the predetermined part in the catalytic layer.2. The catalytic device as set forth in claim 1 , whereinthe predetermined part in the catalytic layer is a portion thereof located at an upstream side along a flow of exhaust gas in the case where the catalytic device is arranged in the exhaust passage.3. The catalytic device as set forth in claim 1 , whereinthe catalytic device has a plurality of cells which are divided by a partition ...

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Номер записи: 85
09-05-2019 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20190136730A1
Автор: MURAKAMI Kyosuke, Onozuka Takashi, Taki Kenichi
Принадлежит:

The exhaust gas purification catalyst according to the present invention includes a substrate and a catalyst coat layer The catalyst coat layer is formed into a multilayer structure having a lower layer a middle layer and an upper layer The upper layer contains Rh and a Ce-containing oxide. The lower layer contains Pd and a Ce-containing oxide. The middle layer is a Ce-free layer that contains Pd but does not contain a Ce-containing oxide. A ratio (B/A) of the content B of Ce in the lower layer to the content A of Ce in the upper layer satisfies 2≤(B/A). 1. An exhaust gas purification catalyst disposed in an exhaust passage of an internal combustion engine and purifying exhaust gas emitted from the internal combustion engine , the exhaust gas purification catalyst comprising:a substrate; and a lower layer provided on the substrate;', 'a middle layer provided on the lower layer; and', 'an upper layer provided on the middle layer;, 'a catalyst coat layer formed on a surface of the substrate, the catalyst coat layer having a multilayer structure comprisingthe upper layer comprising Rh and a first Ce-containing oxide,the lower layer comprising Pd and a second Ce-containing oxide,the middle layer being a Ce-free layer that contains Pd but does not contain a Ce-containing oxide, anda ratio (B/A) of a content B of Ce in the lower layer to a content A of Ce in the upper layer satisfying 2≤(B/A).2. The exhaust gas purification catalyst according to claim 1 , wherein the ratio (B/A) satisfies 3≤AB/A)10.3. The exhaust gas purification catalyst according to claim 1 , wherein the total of the content A of Ce in the upper layer and the content B of Ce in the lower layer is 100 g/L or lower claim 1 , on a CeObasis claim 1 , per L of volume of the substrate.4. The exhaust gas purification catalyst according to claim 1 , wherein the content A of Ce in the upper layer is in the range of from 3 g/L to 30 g/L claim 1 , on a CeObasis claim 1 , per L of volume of the substrate.5. The ...

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Номер записи: 86
15-09-2022 дата публикации

A HYDROGEN-ANNEALED BIMETALLIC OXIDE AND IMPLEMENTATIONS THEREOF

Номер: US20220289586A1
Автор: LAISHRAM Devika, SHARMA Rakesh Kumar, SHEJALE Kiran Prakash
Принадлежит:

The present disclosure relates a hydrogen-annealed bimetallic oxide of Formula I: AO—BO, wherein the A is a metal selected from Hf, Ti, or Zr; B is a metal selected from Ce, Zn, Fe or Co; x is in the range of 1-2; y is in the range of 1-4; and z is in the range of 1-6. The present disclosure further relates to a convenient process for preparing the hydrogen-annealed bimetallic oxide and a method for catalytically treating an exhaust stream is also disclosed herein. 1. A hydrogen-annealed bimetallic oxide of Formula I:{'br': None, 'sub': x', '2', 'y', 'z, 'AO—BO\u2003\u2003Formula I'}wherein the A is a metal selected from Hf, Ti, or Zr; B is a metal selected from Ce, Zn, Fe or Co; x is in the range of 1-2; y is in the range of 1-4; and z is in the range of 1-6.2. The hydrogen-annealed bimetallic oxide as claimed in claim 1 , wherein the x is 1; y is in the range of 1-3; and z is in the range of 2-6.3. The hydrogen-annealed bimetallic oxide as claimed in claim 1 , wherein the AOto BOweight ratio is in the range of 1:4 to 4:1.4. A process for preparing the hydrogen-annealed bimetallic oxide as claimed in claim 1 , said process comprising:a) obtaining a first precursor and a second precursor;b) contacting the first precursor and the second precursor with at least one directing agent in the presence of at least one solvent to form a first mixture;c) drying the first mixture to obtain a second mixture;d) thermally treating the second mixture in the presence of at least one solvent and at least one reducing agent to obtain a third mixture; ande) annealing the third mixture in the presence of hydrogen to obtain the hydrogen-annealed bimetallic oxide.5. The process for preparing the hydrogen-annealed bimetallic oxide as claimed in claim 4 , wherein the first precursor is selected from the group consisting of Hafnium isopropoxide claim 4 , Titanium tetraisopropoxide claim 4 , Zirconium isopropoxide and combinations thereof and the second precursor is selected from the group ...

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Номер записи: 87
16-05-2019 дата публикации

CATALYTIC CONVERTER SUBSTRATES COMPRISING TRIPLY PERIODIC MINIMAL SURFACES

Номер: US20190145298A1
Автор: Abu Al-Rub Rashid Kamel, AL-KETAN Oraib Gheath
Принадлежит:

Described herein are catalytic converter substrates or cores based on triply periodic minimal surfaces (TPMS) geometries, along with methods of making and using the same. 1. A substrate structure for a converter , the substrate structure comprising a plurality of unit cells arranged in three dimensions ,wherein each of the plurality of unit cells comprises a cavity defined by a triply periodic minimal surface, andwherein the cavities of the plurality of unit cells are interconnected to allow a fluid to pass through the cavities of the plurality of unit cells.2. The substrate structure of claim 1 , wherein each of the plurality of unit cells comprises a sheet-shaped body claim 1 , and both opposing surfaces of the sheet-shaped body define triply periodic minimal surfaces that define cavities.3. The substrate structure of claim 2 , wherein the sheet-shaped body has a uniform thickness.4. The substrate structure of claim 1 , wherein each of the plurality of unit cells comprises a solid body claim 1 , and only one surface of opposing surfaces of the solid body defines a triply periodic minimal surface that defines a cavity.5. The substrate structure of claim 1 , wherein the triply periodic minimal surface is a Schwarz Primitive surface claim 1 , a Schwarz crossed layers of parallels (CLP) claim 1 , a Schoen's Gyroid surface claim 1 , a Schoen's I-WP surface claim 1 , a Schwarz diamond surface claim 1 , a Fischer-Koch PMY surface claim 1 , a FRD surface claim 1 , a Fischer-Koch CY surface claim 1 , a Fischer-Koch S surface claim 1 , or a Neovius surface.6. The substrate structure of claim 1 , wherein the substrate structure comprises a metallic material and/or a ceramic material.7. The substrate structure of further comprising a catalyst disposed on the triply periodic minimal surface.8. The substrate structure of further comprising a washcoat claim 7 , wherein the catalyst is dispersed in the washcoat or impregnated into the washcoat.9. The substrate structure of claim ...

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Номер записи: 88
01-06-2017 дата публикации

COMPOSITIONS OF LEAN NOX TRAP (LNT) SYSTEMS AND METHODS OF MAKING AND USING SAME

Номер: US20170151552A1
Автор: Biberger Maximilian A., KEARL Bryant, LEAMON David, QI XIWANG, Yin Qinghua
Принадлежит:

The present disclosure relates to a substrate comprising nanoparticle catalysts and NOstorage materials for treatment of gases, and washcoats for use in preparing such a substrate. Also provided are methods of preparation of the nanoparticle catalysts and NOstorage materials, as well as methods of preparation of the substrate comprising the nanoparticle catalysts and NOstorage materials. More specifically, the present disclosure relates to a coated substrate comprising nanoparticle catalysts and NOstorage materials for lean NOtrap (LNT) systems, useful in the treatment of exhaust gases. 194-. (canceled)95. A method of treating an exhaust gas , comprising:flowing the exhaust gas through a conduit; and a substrate;', 'a washcoat layer comprising oxidative catalytically active micron-particles, the oxidative catalytically active micron-particles comprising oxidative composite nanoparticles bonded to a first micron-sized carrier particle, the oxidative composite nanoparticles comprising a first support nanoparticle and an oxidative catalytic nanoparticle;', 'a washcoat layer comprising reductive catalytically active micron-particles, the reductive catalytically active micron-particles comprising reductive composite nanoparticles bonded to a second micron-sized carrier particle, the reductive composite nanoparticles comprising a second support nanoparticle and a reductive catalytic nanoparticle; and', {'sub': x', 'x, 'a washcoat layer comprising NOtrapping particles, the NOtrapping particles comprising a micron-sized cerium oxide-containing material.'}], 'contacting a coated substrate with the exhaust gas, the coated substrate comprising96. The method of claim 95 , wherein the micron-sized cerium oxide-containing material comprises cerium oxide claim 95 , cerium-zirconium oxide claim 95 , cerium-lanthanum oxide claim 95 , cerium-yttrium oxide claim 95 , cerium-zirconium-lanthanum oxide claim 95 , cerium-zirconium-yttrium oxide claim 95 , cerium-lanthanum-yttrium oxide ...

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Номер записи: 89
01-06-2017 дата публикации

INTEGRATED SENSOR-CATALYST

Номер: US20170152786A1
Автор: Brown David B., Dean Charles E., Di Perna Luciano Nunziato, Li Jianwen, Mital Rahul
Принадлежит: GM GLOBAL TECHNOLOGY OPERATIONS LLC

An integrated sensor-catalyst is disclosed for an after-treatment (AT) system used to filter an exhaust gas flow emitted by an internal combustion engine. The integrated sensor-catalyst includes a sensor element configured to detect a parameter of the exhaust gas flow. The integrated sensor-catalyst also includes a micro-catalyst element configured to filter a pollutant from the exhaust gas flow. Additionally, the integrated sensor-catalyst includes a housing configured to hold the sensor element and the micro-catalyst element and fix the micro-catalyst element relative to the sensor element such that the micro-catalyst element is arranged and maintained in the exhaust gas flow upstream of the sensor element. A vehicle including such an AT system with the integrated sensor-catalyst is also disclosed. 1. An integrated sensor-catalyst for an after-treatment (AT) system used to filter an exhaust gas flow emitted by an internal combustion engine , the integrated sensor-catalyst comprising:a sensor element configured to detect a parameter of the exhaust gas flow;a micro-catalyst element configured to filter a pollutant from the exhaust gas flow; anda housing configured to hold the sensor element and the micro-catalyst element and fix the micro-catalyst element relative to and spaced apart from the sensor element such that the micro-catalyst element is arranged and maintained in the exhaust gas flow upstream of the sensor element.2. The integrated sensor-catalyst of claim 1 , wherein the sensor element is configured to detect a temperature of the exhaust gas flow.3. The integrated sensor-catalyst of claim 1 , wherein the internal combustion engine is a compression-ignition engine.4. The integrated sensor-catalyst of claim 3 , wherein the pollutant is a sooty particulate matter emitted by the engine.5. The integrated sensor-catalyst of claim 4 , wherein the micro-catalyst element includes a precious metal activated by elevated temperature of the exhaust gas flow.6. The ...

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Номер записи: 90
22-09-2022 дата публикации

Metal Foil Catalyst For The Control Of Emissions From Diesel Engines

Номер: US20220297063A1
Автор: Jacobs D. Todd, JR. John W., Robinson, Verdegan Donald R.
Принадлежит:

A diesel engine emissions catalyst which may be used to fill a niche between standard oxidation catalyst and diesel particulate filters for control of diesel particulate matter. The catalyst includes a structure (substrate) comprising one or more coated, corrugated micro-expanded metal foil layers. The coated surface may be a high surface area, stabilized, and promoted washcoat layer. The corrugated pattern may include a herringbone-style pattern that, when in use, is oriented in a longitudinal direction of the diesel engine exhaust flow. The micro-expanded metal foil provides small openings or eyes that, as the exhaust flow passes through the catalyst (transverse to the eye opening), particulates in the flow impinge on the surface and becomes trapped in the eyes. The catalyst may be used to treat a locomotive engine exhaust stream and may be used with a selective catalyst reduction system. 110. A diesel engine emissions catalyst () comprising:{'b': 11', '13', '19, 'a substrate () consisting of a plurality of coated, corrugated, micro-expanded metal foil layers (), each of said layers overlapping an adjacent layer of the plurality to form open flow channels in between, each said layer containing a plurality of eyes () with diamond-shaped openings in a range of 0.058 mm to 2.032 mm and arranged in a herringbone pattern;'}{'b': 23', '23, 'sup': 2', '2, 'a coating of each said layer comprising a washcoat layer () and a precious metal oxide, the washcoat layer () being in a range of 80.5 g/l to 102.5 g/l, including a metal oxide, and having a porous surface area in a range of 100 m/g to 250 m/g of the metal oxide, the precious metal being in a range of 0.071 g/l to 1.41 g/l; and'}{'b': 27', '11, 'sup': 2', '2, 'the open flow channels () per unit area of a face of the substrate () being in a range of 15 cells/cmto 62 cells/cm.'}21013. A diesel engine emissions catalyst () according to claim 1 , a metal of each said metal foil layers () including chromium and aluminum. ...

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Номер записи: 91
22-09-2022 дата публикации

CATALYST FOR REDUCING AMMONIA EMISSIONS

Номер: US20220297093A1
Автор: FRIEDRICH Birgit, KEITL Gordon
Принадлежит: UMICORE AG & CO. KG

The present invention relates to a composition comprising platinum supported on titanium oxide, the platinum particles having an average particle diameter of 50-200 nm. The composition has a surprisingly low light-off temperature for the ammonia oxidation and a high selectivity for oxidation to N2. 1. Composition comprising platinum in the form of platinum particles supported on metal oxide A , characterized in that the platinum particles have an average particle diameter of 50-200 nm , wherein metal oxide A is titanium oxide.2. Composition according to claim 1 , characterized in that the platinum particles have an average particle diameter of 80-120 nm.3. Composition according to claim 1 , characterized in that the composition contains no further precious metal other than platinum.4. Composition according to claim 1 , characterized in that the titanium oxide comprises the crystalline phases anatase and rutile claim 1 , and the anatase to rutile ratio is greater than 9:1.5. Composition according to claim 1 , characterized in that the platinum loading is 0.5-20% by weight based on the metal oxide A.6. Composition according to claim 1 , characterized in that the platinum loading is 3-8% by weight based on the metal oxide A.7. Composition according to claim 1 , characterized in that the metal oxide A contains silicon oxide claim 1 , wherein the proportion of silicon oxide in the metal oxide A is preferably 1 to 10% by weight.8. Composition claim 1 , characterized in that it comprises a composition according to and metal oxide B claim 1 , wherein it is preferred that metal oxide B equals metal oxide A.9. Method for producing a composition according to claim 1 , characterized in that the platinum is deposited from a solution on the metal oxide A and the composition is subjected to a thermal treatment at 700° C. to 900° C. after drying.10. Catalyst comprising a composition according to claim 1 , characterized in that the composition is applied to a carrier substrate of ...

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Номер записи: 92
23-05-2019 дата публикации

Exhaust gas purification underfloor catalyst and catalyst system

Номер: US20190151829A1
Автор: Keisuke Murawaki, Noboru Sato, Sho Hoshino
Принадлежит: Cataler Corp

An exhaust gas purification underfloor catalyst characterized in having a catalyst layer having a lower layer and an upper layer, the lower layer containing alumina and CeO 2 , the noble metal content of the lower layer being at most 0.5 mass % in relation to the mass of the lower layer, the upper layer containing Rh, alumina, and CeO 2 , the amount of noble metals other than Rh contained being 1 mol % or less in relation to the total amount of noble metals contained in the upper layer, the total amount of CeO 2 contained in the lower layer and the upper layer being 14 g/L to 30 g/L, the amount of CeO 2 contained in the upper layer being 7 g/L to 25 g/L, and the amount of CeO 2 contained in the lower layer being 20% or more of the amount of CeO 2 contained in the upper layer.

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Номер записи: 93
22-09-2022 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20220298942A1
Автор: Chinzei Isao, HOSHINO Sho, Ito Minoru, NISHIO Takahiro, ORI Hirotaka, TODA Yosuke, TOJO Takumi
Принадлежит:

Provided is an exhaust gas purification catalyst having an improved catalyst performance while securing an OSC in an air-fuel ratio (A/F) rich atmosphere where HC poisoning is likely to occur. The present disclosure relates to an exhaust gas purification catalyst including a substrate and a catalyst coating layer coated on the substrate. The catalyst coating layer has an upstream coat layer formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst and a downstream coat layer formed from an end portion in a downstream side with respect to the exhaust gas flow direction in the exhaust gas purification catalyst. The downstream coat layer includes Rh as a catalytic metal, alumina-ceria-zirconia complex oxide, and alkaline earth metal. 1. An exhaust gas purification catalyst comprising:a substrate; anda catalyst coating layer coated on the substrate,wherein the catalyst coating layer includes an upstream coat layer and a downstream coat layer, the upstream coat layer being formed from an end portion in an upstream side with respect to an exhaust gas flow direction in the exhaust gas purification catalyst, the downstream coat layer being formed from an end portion in a downstream side with respect to the exhaust gas flow direction in the exhaust gas purification catalyst,wherein the downstream coat layer includes Rh as a catalytic metal, alumina-ceria-zirconia complex oxide, and alkaline earth metal.2. The exhaust gas purification catalyst according to claim 1 ,wherein the alkaline earth metal is barium and/or strontium.3. The exhaust gas purification catalyst according to claim 1 ,wherein the alkaline earth metal has a content of 2 mol to 9 mol with respect to 1 mol of a mole number of Rh.4. The exhaust gas purification catalyst according to claim 1 ,wherein the upstream coat layer includes Pd and/or Pt as catalytic metal.5. The exhaust gas purification catalyst according to claim 1 ,wherein the ...

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Номер записи: 94
23-05-2019 дата публикации

TWO-SECTIONED BACK-PRESSURED CATALYTIC CONVERTER

Номер: US20190153923A1
Автор: Chang Hsin-Chang
Принадлежит:

A two-sectioned back-pressured catalytic converter has a main body, a tail tube, and a honeycomb carrier. The honeycomb carrier is mounted securely in the main body and has a first section relatively proximal to the intake opening and a second section relatively proximal to the exhaust opening. The density of the holes of the first section is higher than that of the second section. Therefore, waste gas has sufficient space for expansion when passing through the first section, and thus the pressure and the temperature are both lowered, solving problems of the back pressure and the backward pushing. The tail tube is securely mounted into the main body to form a baffle. The waste gas will hit the baffle after passing the honeycomb carrier and generate turbulence which can slow down the gas and make the gas fully react with the precious metal coating. 1. A two-sectioned back-pressured catalytic converter comprising: an intake opening; and', 'an exhaust opening;, 'a main body being hollow, and having'}a tail tube securely mounted in the exhaust opening of the main body and mounted into the main body to form a baffle in the main body; and 'a first section and a second section which are connected to each other; the first section disposed proximal to the intake opening relative to the second section, and the second section disposed proximal to the exhaust opening relative to the first section; the first section and the second section respectively having multiple holes, a density of the holes of the first section is higher than a density of the holes of the second section.', 'a honeycomb carrier mounted securely in the main body, and having'}2. The two-sectioned back-pressured catalytic converter as claimed in claim 1 , wherein a length of the first section is shorter than a length of the second section.3. The two-sectioned back-pressured catalytic converter as claimed in claim 1 , wherein the density of the holes of the first section is from 100 to 150 cpsi.4. The two- ...

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Номер записи: 95
14-06-2018 дата публикации

EXHAUST PURIFYING APPARATUS

Номер: US20180163599A1
Автор: HAYASHIDA Masaru, HIDAKA Kengo, IGA Michisuke, INOUE Naoki, KAWASOE Hiroyuki, OHASHI Tamotsu, OKANO Shunji, Ozaki Yuki
Принадлежит: KUBOTA CORPORATION

An exhaust purifying apparatus is provided, that can be manufactured at low manufacturing costs and is capable exhibiting high exhaust purifying performance. The exhaust purifying apparatus includes an exhaust passage, and an exhaust purifying member disposed in the exhaust passage. The exhaust purifying member is made of stainless steel. The surface of the stainless steel material is not covered with a catalyst coat containing a catalyst component, so that the surface of the stainless steel material is brought into contact with exhaust. The exhaust purifying member is made of precipitation hardening stainless steel and/or austenitic stainless steel. 1. An exhaust purifying apparatus comprising:{'b': '1', 'an exhaust passage ();'}{'b': 2', '1', '2, 'an exhaust purifying member () disposed in the exhaust passage (), wherein the exhaust purifying member () is made of stainless steel, and'}{'b': '25', 'a surface of the stainless steel material is not covered with a catalyst coat containing a catalyst component, so that the surface of the stainless steel material is brought into contact with exhaust ().'}22. The exhaust purifying apparatus according to claim 1 , wherein the exhaust purifying member () is made of precipitation hardening stainless steel and/or austenitic stainless steel.32222122228abcabc. The exhaust purifying apparatus according to claim 1 , wherein the exhaust purifying member () includes a plurality of plate members () () () made of stainless steel and keeping a predetermined interval in a passage forming direction of the exhaust passage () claim 1 , and the plate members () () () each include an exhaust passing hole ().422ab. The exhaust purifying apparatus according to claim 3 , wherein the plate member () on a most exhaust upstream side is formed to be greater in thickness than a predetermined one of the plate members () on an exhaust downstream side.522cb. The exhaust purifying apparatus according to claim 3 , wherein the plate member () on a most ...

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Номер записи: 96
30-05-2019 дата публикации

Three-zone diesel oxidation catlayst

Номер: US20190162095A1
Автор: Christoph Hengst, Franz Dornhaus, Michael Schiffer
Принадлежит: Umicore AG and Co KG

The invention relates to a diesel oxidation catalyst which has a support body with a length L extending between a first end face a and a second end face b and catalytically active material zones A, B, and C arranged on the support body, wherein—material zone A contains palladium or platinum and palladium in a weight ratio of Pt:Pd of ≤1 and an alkaline earth metal and extends over 20 to 80% of the length L starting from the end face a, material zone B contains ceroxide, is free of platinum, and extends over 20 to 80% of the length L starting from the end face b, material zone C contains platinum or platinum and palladium in a weight ratio of Pt:Pd of ≥5, and neither material zone A nor material zone C is arranged over material zone B.

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Номер записи: 97
01-07-2021 дата публикации

EXHAUST GAS PURIFICATION CATALYST

Номер: US20210199037A1
Автор: AIKAWA Tomomasa, Chinzei Isao, MIURA Masahide, NAITO Isao, NAKAHIGASHI Seiji, NIHASHI Hiroki, SHIMANO Norimichi, SHIRAKAWA Shogo, TOGASHI Hiromi
Принадлежит:

The present disclosure provides an exhaust gas purification catalyst having improved durability, which comprises a substrate and a catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure, wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion, wherein the downstream portion contains Rh fine particles, and wherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less. 1. An exhaust gas purification catalyst comprising:a substrate; anda catalyst coat layer formed on the substrate, the catalyst coat layer having a two-layer structure,wherein the catalyst coat layer includes an upstream portion on an upstream side and a downstream portion on a downstream side in an exhaust gas flow direction, and a part or all of the upstream portion is formed on a part of the downstream portion,wherein the downstream portion contains Rh fine particles, andwherein the Rh fine particles have an average particle size measured by a transmission electron microscope observation of 1.0 nm or more to 2.0 nm or less, and a standard deviation a of the particle size of 0.8 nm or less.2. The exhaust gas purification catalyst according to claim 1 ,wherein a content of the Rh fine particles in the downstream portion is 0.01 g/L or more to 0.7 g/L or less based on a volume of the substrate.3. The exhaust gas purification catalyst according to claim 1 ,wherein the downstream portion further contains an OSC material that has an oxygen storage capacity, and a weight proportion of the OSC material in the downstream portion is 5% by weight or more to 55% by weight or less.4. The exhaust gas purification catalyst ...

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Номер записи: 98
18-09-2014 дата публикации

Process for producing a diffusion barrier layer, process for producing an exhaust gas treatment unit, exhaust gas treatment unit and motor vehicle

Номер: US20140260219A1
Автор: Dieter Lutz
Принадлежит: EMITEC GESELLSCHAFT FUER EMISSIONSTECHNOLOGIE MBH

A process for producing a diffusion barrier or blocking layer includes providing aluminum oxide on a metal sheet formed of a base material including at least iron, chromium and aluminum. A process for producing an exhaust gas treatment unit includes providing a honeycomb body and a housing in which at least one of the honeycomb body or the housing is formed of the metal sheet and the metal sheet is formed of a base material including at least iron, chromium and aluminum. The metal sheet thus includes, at least in a subregion, a surface layer including at least aluminum oxide and a metal from the group including cobalt and nickel. An exhaust gas treatment unit and a motor vehicle are also provided.

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Номер записи: 99
06-06-2019 дата публикации

CERIUM-AND ZIRCONIUM-BASED MIXED OXIDE

Номер: US20190168188A1
Автор: CHABERT Boris, Ifrah Simon, Jorge Coelho Marques Rui Miguel
Принадлежит: Rhodia Operations

The invention relates to a mixed oxide composed of zirconium, cerium, lanthanum and at least one rare earth oxide other than cerium and lanthanum, having a specific porosity and a high specific surface area; to the method for preparing same and to the use thereof in catalysis. 1. A mixed oxide of zirconium , of cerium , of lanthanum and optionally of at least one rare earth metal other than cerium and lanthanum (REM) , the proportions by weight of these elements , expressed as oxide equivalent , with respect to the total weight of the mixed oxide being as follows:between 8% and 45% of cerium;between 1% and 10% of lanthanum;between 0% and 15% of the rare earth metal other than cerium and lanthanum;the remainder as zirconium, [{'sup': '2', 'after calcination at a temperature of 1100° C. for 4 hours, a BET specific surface of at least 30 m/g;'}, {'sup': '2', 'after calcination at a temperature of 1000° C. for 4 hours, a BET specific surface of at least 55 m/g;'}], 'characterized in that the mixed oxide exhibits{'sub': 'p,1100° C./4 h', 'and characterized in that the derivative curve (dV/dlog D) obtained by mercury porosimetry on the mixed oxide after calcination at a temperature of 1100° C. for 4 hours exhibits, in the range of the pores with a diameter of less than or equal to 200 nm, a peak for which the maximum corresponds to a pore diameter, denoted D, of between 24 and 34 nm, V and D respectively denoting the pore volume and the pore diameter.'}2. The mixed oxide as claimed in claim 1 , characterized in that it also comprises hafnium.3. The mixed oxide as claimed in claim 2 , characterized in that the proportion by weight of hafnium in the mixed oxide is less than or equal to 2.5% claim 2 , expressed as oxide equivalent with respect to the total weight of the mixed oxide.4. The mixed oxide as claimed in claim 2 , characterized in that the elements Ce claim 2 , La claim 2 , REM claim 2 , Zr and Hf are present in the form of oxides claim 2 , of hydroxides or of ...

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Номер записи: 100