Johnson Matthey Public Limited Company

Matthew O'Brien

Francois Moreau

Andrew Francis Chiffey

Jack Corps

Laura Mitchell-Downie

Paul Richard Phillips

David Thompsett

Jillian Elaine Collier

Gavin Michael Brown

David Bergeal

Mark Robert Feaviour

Sanyuan Yang

Christopher Daly

Oliver Cooper

Steven Merrick

Amelie Duraud

Kieran Cole

Francois Pierre Henri Moreau

Elham Yammine

A passive NOx absorber for treating an exhaust gas from a diesel engine is described. The passive NOx absorber comprises a first washcoat region comprising a zeolite catalyst, the zeolite catalyst comprising a noble metal and a zeolite having a SAR of 2-15.

Passive NOadsorber

An exhaust system for treating an exhaust gas produced by a lean burn engine comprising: (i) a NOabsorber catalyst comprising a molecular sieve catalyst disposed on a substrate, wherein the molecular sieve catalyst comprises a noble metal and a molecular sieve, wherein the molecular sieve contains the noble metal; (ii) means for introducing hydrocarbons into the exhaust gas; and (iii) a lean NOtrap; wherein the NOabsorber catalyst is upstream of both the means for introducing hydrocarbons into the exhaust gas and the lean NOtrap.

Exhaust system comprising a passive NOadsorber

A NOabsorber catalyst for treating an exhaust gas from a lean burn engine. The NOabsorber catalyst comprises a molecular sieve catalyst comprising a noble metal and a molecular sieve, wherein the molecular sieve contains the noble metal; an oxygen storage material for protecting the molecular sieve catalyst; and a substrate having an inlet end and an outlet end.

Passive NOx adsorber

A NOabsorber catalyst for treating an exhaust gas from a diesel engine. The NOabsorber catalyst comprises a first NOabsorber material comprising a molecular sieve catalyst, wherein the molecular sieve catalyst comprises a noble metal and a molecular sieve, and wherein the molecular sieve contains the noble metal; a second NOabsorber material comprising palladium (Pd) supported on an oxide of cerium; and a substrate having an inlet end and an outlet end.

An oxidation catalyst is described for treating an exhaust gas produced by a diesel engine comprising a catalytic region and a substrate, wherein the catalytic region comprises a catalytic material comprising: bismuth (Bi), antimony (Sb) or an oxide thereof; a platinum group metal (PGM) selected from the group consisting of (i) platinum (Pt), (ii) palladium (Pd) and (iii) platinum (Pt) and palladium (Pd); and a support material, which is a refractory oxide; wherein the platinum group metal (PGM) is supported on the support material; and wherein the bismuth (Bi), antimony (Sb) or an oxide thereof is supported on the support material and/or the refractory oxide comprises the bismuth, antimony or an oxide thereof.

Oxidation catalyst for a diesel engine exhaust

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Royston, United Kingdom

Matthew O'Brien