Johnson Matthey Public Limited Company

Johnson Matthey Japan Godo Kaisha

Johnson Matthey Inc.

Andrew Peter Walker

Paul Richard Phillips

Raj Rao Rajaram

Philip Gerald Blakeman

Andrew Francis Chiffey

Jane Gast

Sougato Chatterjee

Gavin Michael Brown

Glen Spreitzer

Martyn Vincent Twigg

Satoshi Sumiya

Lifeng Wang

Hanako Oyamada

Guy Richard Chandler

Gudmund Smedler

Bernard Paul Gabriel Ghislain Marie Oger

Ralf Dotzel

Neil Robert Collins

David S Lafyatis

Stephen C Bennett

Paul Joseph Andersen

Jillian Elaine Collier

Alexander Nicholas Michael Green

Joerg Werner Muench

Paul James Millington

Todd Howard Ballinger

Claus Friedrich Goersmann

Stephen Poulston

Anders Klas Andreasson

Mikael Larsson

Jörg Werner Münch

Isabel Zoe Tingay

Stanislaw Edmund Golunski

Stephen David Pollington

Penelope Markatou

Olivier Sonntag

Tim Genschow

Mats Lavenius

Jonathan Charles Frost

David Scott Lafyatis

Julia Margaret Evans

Mario Jaime Castagnola

Michael Gavin Brown

Eive Tord Ronny Allansson

Johnathan C Frost

Lingzhi Zhang

Martin Vincent Twigg

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

An extruded honeycomb catalyst for nitrogen oxide reduction according to the selective catalytic reduction (SCR) method in exhaust gases from motor vehicles includes an extruded active carrier in honeycomb form having a first SCR catalytically active component and with a plurality of channels through which the exhaust gas flows during operation, and a washcoat coating having a second SCR catalytically active component being applied to the extruded body, wherein the first SCR catalytically active component and the second SCR catalytically active component are each independently one of:

Extruded honeycomb catalyst

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.

A catalyzed substrate monolithfor use in treating exhaust gas emitted from a lean-burn internal combustion engine, which catalyzed 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 volatilize 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 volatilized PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat coating.

An exhaust system for a compression ignition engine comprising: a water adsorbent material; and a catalyst composition for treating an exhaust gas pollutant produced by the compression ignition engine; wherein the water adsorbent material is: (i) arranged to contact exhaust gas from the compression ignition engine before the catalyst composition; and (ii) in thermal communication with the catalyst composition.

Exhaust system for a compression ignition engine comprising a water adsorbent material

Provided is a catalytic article comprising (a) a flow through honeycomb substrate having channel walls; (b) a first NH-SCR catalyst composition coated on and/or within the channel walls in a first zone; and (c) a second NH-SCR catalyst composition coated on and/or within the channel walls in a second zone, provided that the first zone is upstream of the second zone and the first and second zones are adjacent or at least partially overlap; and wherein the first NH-SCR catalyst comprises a first copper loaded molecular sieve having a copper to aluminum atomic ratio of about 0.1 to 0.375 and the second NH-SCR catalyst comprises a second copper loaded molecular sieve having a copper-to-aluminum atomic ratio of about 0.3 to about 0.6.

Catalytic article for treating exhaust gas

An apparatus comprising a compression ignition engine and an exhaust system therefor comprising at least one exhaust system component for treating exhaust gas and means for generating an exotherm for heating the at least one exhaust system component, which exotherm generating means consisting essentially of a catalyst and means for injecting hydrocarbon into exhaust gas for combustion on the catalyst, which catalyst consisting essentially of both a palladium (Pd) component and a platinum (Pt) component, and an optional support material, disposed on a substrate monolith.

Exhaust system comprising exotherm-generating catalyst

A substrate monolithhaving a length L and comprising a first zoneof substantially uniform length defined at one end by a first end of the substrate monolith, which first zone comprising a selective catalytic reduction (SCR) catalyst for reducing oxides of nitrogen with a nitrogenous reductant in exhaust gas emitted from an internal combustion engine and a second zoneof substantially uniform length less than L defined at one end by a second end of the substrate monolith, which second zone comprising (a) at least one particulate metal oxide or a mixture of any two or more thereof for trapping gas phase platinum group metal (PGM), which at least one particulate metal oxide does not act as a support for any other catalytic component; or (b) a component capable of trapping and/or alloying with gas phase PGM.

Substrate monolith comprising SCR catalyst

An exhaust systemfor an internal combustion engine comprises a) a first catalysed substrate monolithcomprising a first washcoat coating disposed in a first washcoat zoneof the substrate monolith and a second washcoat coating disposed in a second washcoat zoneof the substrate monolith, wherein the first washcoat coating comprises a catalyst composition comprising at least one platinum group metal (PGM) and at least one support material, 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 material supporting copper for trapping volatilised PGM and wherein the second washcoat coating is oriented to contact exhaust gas that has contacted the first washcoat; and b) a second catalysed substrate monolithcomprising a catalyst for selectively catalysing the reduction of oxides of nitrogen to dinitrogen with a nitrogenous reductant disposed downstream from the first catalysed substrate monolith.

Exhaust system for a lean-burn internal combustion engine including SCR catalyst

Growing community of inventors

Royston, United Kingdom

Andrew Peter Walker