Johnson Matthey Public Limited Company

Stuart David Reid

Paul Richard Phillips

Guy Richard Chandler

Alexander Nicholas Michael Green

Daniel Swallow

Raj Rao Rajaram

James Alexander Wylie

Desiree Duran-Martin

Wolfgang Strehlau

Andrew Armitage

Hai-Ying Chen

Joseph Michael Fedeyko

Andrew Francis Chiffey

Francois Moreau

Philip Gerald Blakeman

John Benjamin Goodwin

Jillian Elaine Collier

Erich Conlan Weigert

James Leeland

Paul James Millington

Julian Peter Cox

Todd Howard Ballinger

Neil Robert Collins

Jonathan David Radcliffe

Gregory Gregori

Joanne Elizabeth Melville

Nuria Lastra-Calvo

Byron Truscott

David Marvell

Desiree Duran Martin

Mark Walton

Thilanka Wijemanne

Rebecca Maksymowicz

Julian Pritzwald-Stegmann

James Googan

Francesco Foschi

Keimoy St Hill

Anton Macminn

David Xuereb

Julian Pritzwald-stegmann

Rodney Foo Kok Shin

Ross Barron

Julian P Cox

Erich C Weigert

A catalytic wall-flow monolith filter for use in an emission treatment system is disclosed. The filter comprises porous walls, a first face and a second face defining a longitudinal direction therebetween and first and second pluralities of channels extending in the longitudinal direction. The first plurality of channels provides a first plurality of inner surfaces and is open at the first face and closed at the second face; and the second plurality of channels provides a second plurality of inner surfaces and is open at the second face and closed at the first face. The filter comprises a first selective catalytic reduction (SCR) catalyst coated on the first plurality of inner surfaces of the porous walls to form a first SCR catalyst porous layer, a second SCR catalyst within the porous walls, and a third SCR catalyst coated on the second plurality of inner surfaces of the porous walls to form a third SCR catalyst porous layer.

Catalytic wall-flow filter

Provided is a catalytic washcoat having a catalyst component and an alumina binder, wherein the catalyst component includes an aluminosilicate molecular sieve having a beta (BEA) and/or chabazite (CHA) framework, and about 1 to about 10 weight percent of a base metal component comprising iron and/or copper, wherein said weight percent is based on the weight of the aluminosilicate molecular sieve.

Alumina binders for SCR catalysts

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 lean NOtrap catalyst and its use in an emission treatment system for internal combustion engines is disclosed. The lean NOtrap catalyst comprises a first layer for storing nitrogen oxides (NOx) under lean exhaust gas conditions and releasing and/or reducing stored NOx during rich exhaust gas conditions, and a second layer, said second layer comprising a first zone for oxidizing carbon monoxide (CO) and/or hydrocarbons (HC), and a second zone for oxidizing nitric oxide (NO), and a substrate having an inlet end and an outlet end.

Lean NOtrap catalyst

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

A lean NOtrap catalyst and its use in an emission treatment system for internal combustion engines is disclosed. The lean NOtrap catalyst comprises a first layer, a second layer, and a third layer.

Three layer NOadsorber catalyst

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 catalyst. The modified LNT comprises a first layer and a second layer. The first layer comprises a NOadsorbent component and one or more platinum group metals. The second layer comprises a diesel oxidation catalyst zone and an NO oxidation zone. The diesel oxidation catalyst zone comprises a platinum group metal, a zeolite, and optionally an alkaline earth metal. The NO oxidation zone comprises a platinum group metal and a carrier. The modified LNT stores NOat temperatures below about 200&#xb0; C. and releases at temperatures above about 200&#xb0; C. The modified LNT and a method of using the modified LNT are also disclosed.

Exhaust system with a modified lean NOx trap

A NOtrap catalyst is disclosed. The NOtrap catalyst comprises a noble metal, a NOstorage component, a support, and a first ceria-containing material. The first ceria-containing material is pre-aged prior to incorporation into the NOx trap catalyst, and may have a surface area of less than 80 m/g. The invention also includes exhaust systems comprising the NOtrap catalyst, and a method for treating exhaust gas utilizing the NOtrap catalyst.

NOtrap

[object Object]

A catalyst for storing nitrogen oxides (NO) in an exhaust gas from a lean burn engine comprising a NOstorage material and a substrate, wherein the NOstorage material comprises a NOstorage component and an NO oxidation promoter on a support material, wherein the NO oxidation promoter is manganese or an oxide, hydroxide or carbonate thereof.

Nitrogen oxides (NOx) storage catalyst

Growing community of inventors

Royston, United Kingdom

Stuart David Reid