Johnson Matthey Public Limited Company

Gm Global Technolgoy Operations, Inc.

Penelope Markatou

Kieran John Cole

Robert Hanley

Colin Russell Newman

Masahito Shibata

Yoshihito Hashimoto

Yaritza M Lopez-De Jesus

Wassim Klink

Rahul Mital

Andrew Peter Walker

Eric Darvin Thomas

Jane Gast

Gudmund Smedler

Mikael Larsson

Olivier Sonntag

Ceren Aydin

Tim Genschow

Lingzhi Zhang

Patrick Bannon

Dennis Murray

Kieran Cole

Yaritza Lopez-De Jesus

Methods and systems related to an exhaust gas treatment system including, in order:

Exhaust gas treatment system

An oxidation catalyst is described for treating an exhaust gas from a diesel engine, which oxidation catalyst comprises: a substrate; a first washcoat region disposed on the substrate, wherein the first washcoat region comprises a first platinum group metal (PGM) and a first support material; a second washcoat region adjacent to the first washcoat region, wherein the second washcoat region comprises a second platinum group metal (PGM) and a second support material; a third washcoat region disposed on the substrate, wherein the third washcoat region comprises a third platinum group metal (PGM) and a third support material; and wherein either: (i) the third washcoat region is adjacent to the second washcoat region; or (ii) the second washcoat region is disposed or supported on the third washcoat region. Also described are uses and methods involving the oxidation catalyst.

Zoned diesel oxidation catalyst

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

Growing community of inventors

Wayne, PA, United States of America

Penelope Markatou