Johnson Matthey Public Limited Company

Alexander Nicholas Michael Green

Guy Richard Chandler

Paul Richard Phillips

Stuart David Reid

Hai-Ying Chen

Joseph Michael Fedeyko

Philip Gerald Blakeman

Matthew Eben Harris

Jillian Elaine Collier

Daniel Avis

Shadab Sharif Mulla

James Alexander Wylie

Wendy Manning

Debnath De

Raj Rao Rajaram

Erich Conlan Weigert

Julian Peter Cox

Todd Howard Ballinger

Neil Greenham

Desiree Duran-Martin

Yannick Bidal

Alanna Susan Murphy

Joanne Elizabeth Melville

Andrew Peter Walker

Joerg Werner Muench

Juergen Bauer

Irene Piras

Caitlin Lucy Jenkins

Oliver Hemming

Maria Pia Ruggeri

Garry Adam Burgess

Nikki Jane Amos-Reichert

Sofia Lopez-Orozco

Miroslaw Gall

Loredana Mantarosie

Carmelo Iacono

Rodney Foo Kok Shin

Julian P Cox

Erich C Weigert

Catalyst compositions and methods of preparation comprising: exchanging a rare earth element into a molecular sieve; incorporating a promoter metal into the molecular sieve; wherein the rare earth element exchanging step and the promoter metal incorporation step are performed as separate steps.

Catalyst for treating exhaust gas

A catalytic composition for treating a NOx-containing exhaust gas, wherein the composition comprises a copper-substituted zeolite comprising: i) Ce in a total amount of about 0.1 to about 200 g/ft; and ii) Mn in a total amount of about 0.1 to about 200 g/ft.

Catalytic composition for treating a NOx-containing exhaust gas

A catalytic composition for treating a NOx-containing exhaust gas, wherein the composition comprises a copper-substituted small-pore zeolite comprising: i) Ce and/or La in a total amount of about 5 to about 400 g/ft; and ii) Nd and/or Nb in a total amount of about 5 to about 400 g/ft.

Catalytic composition

The present disclosure relates to a method for forming a catalyst article comprising: (a) forming a plastic mixture having a solids content of greater than 50% by weight by mixing together a crystalline small pore or medium pore molecular sieve in an Hor NHform, an insoluble active metal precursor, an inorganic matrix component, an organic auxiliary agent, an aqueous solvent and optionally inorganic fibres; (b) moulding the plastic mixture into a shaped article; and (c) calcining the shaped article to form a solid catalyst body. The present disclosure further relates to a catalyst article, particularly a catalyst article which is suitable for use in the selective catalytic reduction of nitrogen oxides, and to an exhaust system.

Method for forming a catalyst article

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

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 catalyst article comprises an SCR catalyst and a NOx adsorber catalyst, where each of these catalysts comprise a metal molecular sieve, each with a different metal. The catalyst article can be close coupled with other components to give a NOperformance advantage from cold start to a combined DOC and SCRF system. Higher NOconversion is also shown in under-floor location due to NOx storage before SCR light off and selective NHslip control, allowing higher NH3 fill levels. Systems comprising the catalyst article and methods of using the catalyst article to give improved hydrocarbon and carbon monoxide control, as well as ammonia slip control, are described. The systems can include flow-through or wall-flow monoliths.

Combining SCR with PNA for low temperature emission control

Provided is a method for reducing NO emissions in an exhaust gas comprising contacting an exhaust gas containing NHand an inlet NO concentration with an SCR catalyst composition containing small pore zeolite having an SAR of about 3 to about 15 and having about 1-5 wt. % of an exchanged transition metal.

Provided is a catalyst for the selective reduction of NOx comprising a two molecular sieve materials having a CHA structure, wherein the first molecular sieve has a mean crystal size of about 0.01 to 1 &#x3bc;m and the second molecular sieve has a mean crystal size of about 1-5 &#x3bc;m, and wherein the first molecular sieve contains a first extra-framework metal, the second molecular sieve contains a second extra-framework metal, and wherein said first and second extra-framework metals are independently selected from the group consisting of cesium, copper, nickel, zinc, iron, tin, tungsten, molybdenum, cobalt, bismuth, titanium, zirconium, antimony, manganese, chromium, vanadium, niobium, and combinations thereof.

Catalyst blends

A heterogeneous catalyst article having at least one combination of a first molecular sieve having a medium pore, large pore, or meso-pore crystal structure and optionally containing a first metal, and a second molecular sieve having a small pore crystal structure and optionally containing a second metal, and a monolith substrate onto or within which said catalytic component is incorporated, wherein the combination of the first and second molecular sieves is a blend, a plurality of layers, and/or a plurality of zones.

[object Object]

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

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Baldock, United Kingdom

Alexander Nicholas Michael Green