Johnson Matthey Public Limited Company

Johnson Matthey Japan Godo Kaisha

Other

Johnson Matthey Inc.

Raj Rao Rajaram

Paul Richard Phillips

Andrew Francis Chiffey

Andrew Peter Walker

Jillian Elaine Collier

Philip Gerald Blakeman

Jane Gast

Gavin Michael Brown

Sougato Chatterjee

Hai-Ying Chen

Agnes Suganya Raj

Joseph Michael Fedeyko

John Leonello Casci

John Benjamin Goodwin

Francois Moreau

David Bergeal

Daniel Hatcher

Cathal Francis Prendergast

Glen Spreitzer

Guy Richard Chandler

Paul Joseph Andersen

David Thompsett

Satoshi Sumiya

Lifeng Wang

Desiree Duran-Martin

Stuart David Reid

Janet M Fisher

Paul James Millington

Dongxia Liu

Robert Peter Hodgkins

Stephen Poulston

Alexander Nicholas Michael Green

Daniel Swallow

John W Hayes

Alan F Diwell

John Kilmartin

Jing Lu

Ralf Dotzel

Rainer Leppelt

Todd Howard Ballinger

Neil Robert Collins

Hanako Oyamada

Graham P Ansell

Sylvie Cécile Laroze

Rodney Kok Shin Foo

David William Prest

Stephen David Pollington

Andrew Armitage

Desiree Duran Martin

Rebecca Maksymowicz

Valerie Marie Renee Houel

Jonathan David Radcliffe

Jillian Elaine Bailie

Peter Geoffrey Gray

Fiona-Mairead Mckenna

Helen A Hatcher

Sylvie Cecile Laroze

Claus Friedrich Goersmann

Jörg Werner Münch

Hubert Schedel

Isabel Zoe Tingay

Stanislaw Edmund Golunski

David Scott Lafyatis

Julia Margaret Evans

Mario Jaime Castagnola

Fiona-Mairead McKenna

Andrea Hawkings

David William James

Valerie Anne Self

Hugh Gavin Hamilton

Andrea Hawkins

Toseef Aslam

Valérie Marie Renée Houel

Michael Gavin Brown

Peter Christopher Hinde

Emma Ruth Schofield

Athanasios Tsolakis

Janet Mary Fisher

Rodney Foo Kok Shin

Agnes Raj

Robert P Hodgkins

Jospeh Michael Fedeyko

Isabel Zoe Jones

Jilian Elaine Collier

A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Jr and Pt.

Transition metal/zeolite SCR catalysts

A method of converting nitrogen oxides in a gas to nitrogen by contacting the nitrogen oxides with a nitrogenous reducing agent in the presence of a zeolite catalyst containing at least one transition metal, wherein the zeolite is a small pore zeolite containing a maximum ring size of eight tetrahedral atoms, wherein the at least one transition metal is selected from the group consisting of Cr, Mn, Fe, Co, Ce, Ni, Cu, Zn, Ga, Mo, Ru, Rh, Pd, Ag, In, Sn, Re, Ir and Pt.

A NOadsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOadsorber catalyst comprises a first layer consisting essentially of a support material, one or more platinum group metals disposed on the support material, and a NOstorage material.

NOx adsorber catalyst

A NOadsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOadsorber catalyst composition comprises a support material, one or more platinum group metals disposed on the support material, and a NOstorage material.

NOadsorber catalyst

A cold start catalyst is disclosed. The cold start catalyst is effective to adsorb NOand hydrocarbons (HC) at or below a low temperature and to covert and release the adsorbed NOand HC at temperatures above the low temperature. The cold start catalyst comprises a molecular sieve catalyst and a supported platinum group metal catalyst. The molecular sieve catalyst consists essentially of a noble metal and a molecular sieve. The supported platinum group metal catalyst comprises one or more platinum group metals and one or more inorganic oxide carriers. The invention also includes an exhaust system comprising the cold start catalyst, and a method for treating exhaust gas from an internal combustion engine utilizing the cold start catalyst.

Cold start catalyst and its use in exhaust systems

A NOadsorber catalyst composition, a NOadsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOadsorber catalyst composition a support material and one or more platinum group metals disposed on the support material, wherein the support material comprises a NOstorage enhancer.

SCR-active molecular-sieve based catalysts with improved low-temperature performance are made by heating a molecular-sieve in a non-oxidizing atmosphere with steam (hydrothermal treatment), or in a reducing atmosphere without steam (thermal treatment), at a temperature in the range of 600-900&#xb0; C. for a time period from 5 minutes to two hours. The resulting SCR-active iron-containing molecular sieves exhibit a selective catalytic reduction of nitrogen oxides with NHor urea at 250&#xb0; C. that is at least 50% greater than if the iron-containing molecular-sieve were calcined at 500&#xb0; C. for two hours without performing the hydrothermal or thermal treatment.

SCR catalysts having improved low temperature performance, and methods of making and using the same

The invention provides an exhaust gas cleaning oxidation catalyst and in particular to an oxidation catalyst for cleaning the exhaust gas discharged from internal combustion engines of compression ignition type (particularly diesel engines). The invention further relates to a catalysed substrate monolith comprising an oxidising catalyst on a substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine. In particular, the invention relates to a catalysed substrate monolith comprising a first washcoat coating and a second washcoat coating, wherein the second washcoat coating is disposed in a layer above the first washcoat coating.

Oxidation catalyst for internal combustion engine exhaust gas treatment

A catalysed substrate monolithfor use in treating exhaust gas emitted from a lean-burn internal combustion engine, which catalysed substrate monolithcomprising a first washcoat coatingand a second washcoat coating, wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material for the at least one PGM, wherein at least one PGM in the first washcoat coating is liable to volatilise when the first washcoat coating is exposed to relatively extreme conditions including relatively high temperatures, wherein the second washcoat coating comprises at least one metal oxide for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating.

Catalysed substrate monolith

A catalyst article including a substrate with an inlet side and an outlet side, a first zone and a second zone, where the first zone comprises a passive NOx adsorber (PNA) comprising a platinum group metal and a base metal, both on a molecular sieve, and an ammonia slip catalyst (ASC) comprising an oxidation catalyst comprising a platinum group metal on a support, and a first SCR catalyst; where the second zone comprises a catalyst selected from the group consisting of a diesel oxidation catalyst (DOC) and a diesel exotherm catalyst (DEC); and where the first zone is located upstream of the second zone. The first zone may include a bottom layer including a blend of: (1) the oxidation catalyst and (2) the first SCR catalyst; and a top layer including a second SCR catalyst, the top layer located over the bottom layer.

Platinum group metal and base metal on a molecular sieve for PNA-SCR-ASC close-coupled system

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.

Oxidation catalyst for treating the exhaust gas of a compression ignition engine

Exhaust gas catalysts are disclosed. One exhaust gas catalyst comprises a noble metal and a molecular sieve, and has an infrared spectrum having a characteristic absorption peak from 750 cmto 1050 cmin addition to the absorption peaks for the molecular sieve itself. The exhaust gas catalyst also comprises a noble metal and a molecular sieve, having greater than 5 percent of the noble metal amount located inside pores of the molecular sieve. The exhaust gas catalyst also comprises a first and second molecular sieve catalyst. The first molecular sieve catalyst comprises a first noble metal and a first molecular sieve, and the second molecular sieve catalyst comprises a second noble metal and a second molecular sieve. The first and second molecular sieves are different. The invention also includes exhaust systems comprising the exhaust gas catalysts, and a method for treating exhaust gas utilizing the exhaust gas catalysts.

Noble metal-molecular sieve catalysts

A NOadsorber catalyst composition, a NOadsorber catalyst and its use in an emission treatment system for internal combustion engines, is disclosed. The NOadsorber catalyst composition a support material and one or more platinum group metals disposed on the support material, wherein the support material comprises a mixed dopant NOstorage enhancer.

The invention provides an exhaust gas cleaning oxidation catalyst and in particular to an oxidation catalyst for cleaning the exhaust gas discharged from internal combustion engines of compression ignition type (particularly diesel engines). The invention further relates to a catalyzed substrate monolith comprising an oxidizing catalyst on a substrate monolith for use in treating exhaust gas emitted from a lean-burn internal combustion engine. In particular, the invention relates to a catalyzed substrate monolith comprising a first washcoat coating and a second washcoat coating, wherein the second washcoat coating is disposed in a layer above the first washcoat coating.

Growing community of inventors

Slough, United Kingdom

Raj Rao Rajaram