公开(公告)号：US20180280879A1

公开(公告)日：2018-10-04

申请号：US15935178

申请日：2018-03-26

Applicant: JOHNSON MATTHEY PUBLIC LIMITED COMPANY

Inventor： Heledd HOWELLS ,  David MICALLEF ,  Andrew NEWMAN ,  Neil GREENHAM

IPC: B01D53/94 ,  B01J29/78 ,  B01J29/76 ,  B01J23/42 ,  B01J35/00 ,  B01J35/04 ,  B01J37/00 ,  B01J37/02 ,  B01J37/08 ,  B01J23/63 ,  B01J29/80 ,  F01N3/20 ,  F01N3/28

Abstract: A catalyst article for treating a flow of a combustion exhaust gas comprises: a catalytically active substrate comprising one or more channels extending along an axial length thereof through which, in use, a combustion exhaust gas flows, the one or more channels having a first surface for contacting a flow of combustion exhaust gas; wherein the substrate is formed of an extruded vanadium-containing SCR catalyst material, wherein a first layer is provided on at least a portion of said first surface, wherein the first layer comprises an ammonia slip catalyst composition comprising one or more platinum group metals supported on titania, a silica-titania mixed oxide, a Ce—Zr mixed oxide, or a mixture thereof, and a second layer is provided on at least a portion of the first layer and comprises an SCR catalyst composition.