Johnson Matthey Public Limited Company

Other

Johnson Matthey Inc.

Johnson Matthey (shanghai) Chemicals Limited

Hai-Ying Chen

Joseph Michael Fedeyko

Paul Joseph Andersen

Erich Conlan Weigert

Raul Francisco Lobo

Jing Lu

Trong Pham

Raj Rao Rajaram

John Leonello Casci

Julian Peter Cox

Jillian Elaine Collier

Guy Richard Chandler

Alexander Nicholas Michael Green

Todd Howard Ballinger

Shadab Sharif Mulla

Arthur Joseph Reining

Dongxia Liu

Philip Gerald Blakeman

Debnath De

Wendy Manning

Alejandra Rivas-Cardona

Hsiao-Lan Chang

Nicholas McNamara

Jeffery Scott Rieck

Robert Peter Hodgkins

David Thompsett

Kevin Doura

Neil Greenham

Eric Tyo

Rodney Kok Shin Foo

Paul Richard Phillips

Stuart David Reid

Matthew Eben Harris

Sanyuan Yang

James Alexander Wylie

Kwangmo Koo

Yannick Bidal

Rita Aiello

Jelvehnaz Mirzababaei

Ralf Dotzel

David Bergeal

Rainer Leppelt

Agnes Suganya Raj

Mikael Larsson

Jörg Werner Münch

David Micallef

Dongsheng Qiao

Andrew Newman

Hubert Schedel

John Kilmartin

Hongyu Ji

Desiree Duran-Martin

Duncan John William Winterborn

Jillian Elaine Bailie

Xiang Zheng

Takashi Yamada

Fiona-Mairead McKenna

Fiona-Mairead Mckenna

Per Marsh

Scott Cauffman

Duncan Winterborn

Kenneth Camm

Eric Burkholder

Michael Hales

Qingling Liu

Alejandra Rivas-cardona

Erich Weigert

Julian Cox

Julian P Cox

Erich C Weigert

Robert P Hodgkins

Jospeh Michael Fedeyko

Todd Ballinger

Jilian Elaine Collier

The present invention relates to a compressed natural gas combustion and exhaust system comprising: (i) a natural gas combustion engine and (ii) an exhaust treatment system comprising an intake for receiving an exhaust gas from the combustion engine and a catalyst article arranged to receive and treat the exhaust gas, wherein the catalyst article comprises: a substrate having at least first and second coatings, the first coating comprising a palladium-containing alumina and/or a base-metal containing alumina and the second coating comprising a palladium-containing zeolite, wherein the first coating is arranged to contact the exhaust gas before the second coating; and, wherein the system is configured to selectively operate in: (a) a lean first mode in which sulphur is trapped on the first coating; and (b) a rich second mode whereby sulphur is released from the first coating. The present invention further relates to a method.

Compressed natural gas combustion and exhaust system

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

Provided are a novel form of AFX zeolite, a novel synthesis technique for producing pure phase small pore zeolites, a novel synthesis method for producing a zeolite with an increased Al pair content, a catalyst comprising the AFX zeolite in combination with a metal, and methods of using the same.

Zeolite synthesis with alkaline earth metal

A close-coupled catalytic article, and its use in an exhaust system for internal combustion engines, is disclosed. The close-coupled catalytic article for the treatment of an exhaust gas comprising: an upstream substrate and a downstream substrate, wherein the upstream substrate is spaced apart from the downstream substrate, wherein the upstream substrate comprises a first three-way catalyst (TWC) composition and the downstream substrate comprises a second TWC composition, the first and second TWC compositions each comprising an oxygen storage component (OSC), wherein a loading of the OSC in the downstream substrate is greater than a loading of the OSC in the upstream substrate and is at least 2.2 g/in.

Catalytic article and the use thereof for the treatment of an exhaust gas

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 includes a passive NOx adsorber (PNA), and an ammonia slip catalyst (ASC) comprising a platinum group metal on a support and a first SCR catalyst; where the second zone includes 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 with a blend of: (1) the platinum group metal on a support and (2) the first SCR catalyst; and a top layer with a second SCR catalyst, the top layer located over the bottom layer.

Single brick SCR/ASC/PNA/DOC close-coupled catalyst

The invention relates to a catalytic article comprising a substrate having an inlet and an outlet; a first coating comprising a blend of: (1) platinum on a support, and (2) a first SCR catalyst; and a second coating comprising a second SCR catalyst; wherein the support comprises at least one of a zeolite or a SiO&#x2014;AlOmixed oxide. The platinum may be fixed on the support in solution.

Ammonia slip catalyst with in-situ PT fixing

The invention relates to a catalytic article comprising a substrate having an inlet and an outlet; a first coating comprising a blend of: (1) platinum on a support, and (2) a first SCR catalyst comprising a Cu- and Mn-exchanged molecular sieve; and a second coating comprising a second SCR catalyst; wherein the support comprises at least one of a zeolite or a SiO-AlOmixed oxide. The platinum may be fixed on the support in solution.

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 and a first oxygen storage capacity (OSC) material, wherein the first OSC material has a fresh specific surface area (SSA) of at least 10 m/g; and wherein the first OSC material has an SSA difference of no more than 30 m/g between the fresh first OSC material and the aged first OSC material.

Twc catalysts for gasoline engine exhaust gas treatments

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.

Provided are a novel synthesis technique for producing pure phase aluminosilicate zeolite and a catalyst comprising the phase pure zeolite in combination with a metal, and methods of using the same. The pure phase aluminosilicate zeolite can be selected from those having an ITW framework and a silica to alumina ratio of less than about 140 or, an STW framework and a silica to alumina ratio less than about 100.

Zeolite synthesis with a fluoride source

A process for the preparation of an extra-framework metal-containing aluminosilicate zeolite involves the steps of: (a) forming a reactant mixture A comprising (i) an aqueous slurry of an aluminosilicate zeolite in a H-form, and (ii) a metal containing compound or free metal, wherein the mixture does not comprise ammonia, ammonium hydroxide or an ammonium salt, and (b) reacting the metal containing compound or free metal with the aluminosilicate zeolite in a H-form in reactant mixture A and forming a product mixture B, a reaction mixture comprising the extra-framework metal-containing aluminosilicate zeolite. The metal comprises one or more of copper, iron, manganese, nickel and palladium. The step of reacting the metal with the aluminosilicate zeolite in a H-form is performed in a single exchange. The extra-framework metal-containing aluminosilicate zeolite can then be used directly in forming a washcoat that can be applied to a support.

Enhanced introduction of extra-framework metal into aluminosilicate zeolites

A transition-metal-CHA molecular sieve catalyst and mixed-template synthesis procedure are disclosed.

Mixed template synthesis of low silica CHA zeolite

Mixed template synthesis of high silica Cu-CHA

Provided are a novel form of AEI zeolite, a novel synthesis technique for producing pure phase AEI zeolite, a catalyst comprising the AEI zeolite in combination with a metal, and methods of using the same. The AEI aluminosilicate zeolite has a cuboid morphology and a silica-to-alumina ratio of 20 to 50.

High silica AEI zeolite

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Conshohocken, PA, United States of America

Hai-Ying Chen