Search International and National Patent Collections

1. (WO2014194225) CATALYZED FILTER FOR TREATING EXHAUST GAS

Pub. No.:    WO/2014/194225    International Application No.:    PCT/US2014/040284
Publication Date: Fri Dec 05 00:59:59 CET 2014 International Filing Date: Sat May 31 01:59:59 CEST 2014
IPC: F01N 3/035
F01N 3/022
Applicants: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
CHEN, Hai-ying
Inventors: CHEN, Hai-ying
DE, Debnath
MANNING, Wendy
COX, Julian
Title: CATALYZED FILTER FOR TREATING EXHAUST GAS
Abstract:
Provided is a diesel particulate filter capable of removing soot from an exhaust gas while operating at low backpressure, the filter comprising (a) a wall-flow filter substrate (23) having a mean pore size, an inlet side (30), an outlet side (32), and a porous interior between the inlet and outlet sides; and (b) a catalyst composition (44) coated from the outlet side of the substrate, wherein the catalyst composition has a d5Q particle size distribution, wherein the d50 particle size distribution is greater than or equal to the mean pore size divided by 4.9, and wherein the inlet side is substantially free of a catalyst coating.