Johnson Matthey Public Limited Company

Glen Spreitzer

Paul Richard Phillips

Andrew Francis Chiffey

Raj Rao Rajaram

Andrew Peter Walker

Philip Gerald Blakeman

Gavin Michael Brown

Paul James Millington

Jane Gast

Sougato Chatterjee

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

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 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

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 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.

Growing community of inventors

Collegeville, PA, United States of America

Glen Spreitzer