公开(公告)号：US20180266290A1

公开(公告)日：2018-09-20

申请号：US15925808

申请日：2018-03-20

Applicant: Johnson Matthey Public Limited Company

Inventor： Garry Adam BURGESS ,  Guy Richard CHANDLER ,  Keith Anthony FLANAGAN ,  James GOOGAN ,  David MARVELL ,  Paul Richard PHILLIPS

IPC: F01N3/035 ,  F01N3/20 ,  F01N3/28 ,  B01J29/76 ,  B01J35/04 ,  B01D53/94

CPC classification number: F01N3/035 ,  B01D53/9418 ,  B01D53/9468 ,  B01D53/9472 ,  B01D2251/206 ,  B01D2255/20746 ,  B01D2255/50 ,  B01D2255/9022 ,  B01D2255/9032 ,  B01D2255/9035 ,  B01D2255/9037 ,  B01D2255/9155 ,  B01J29/763 ,  B01J35/04 ,  F01N3/2066 ,  F01N3/2828 ,  F01N2330/06 ,  F01N2370/04 ,  F01N2370/24 ,  F01N2510/063 ,  F01N2510/0684

Abstract: A catalytic wall-flow monolith filter for use in an emission treatment system comprises a wall flow monolith comprising a porous substrate having surfaces that define the channels and having a first zone extending in the longitudinal direction from a first end face towards a second end face for a distance less than the filter length and a second zone downstream of the first zone, wherein a first SCR catalyst is distributed throughout the first zone of the porous substrate, and a second SCR catalyst is located on a layer that covers the surfaces in the second zone of the porous substrate. Systems and methods of using the filter in treating exhaust gases are described.