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1. (WO2017055810) CATALYTIC FILTER HAVING A SOOT CATALYST AND AN SCR CATALYST

Pub. No.:    WO/2017/055810    International Application No.:    PCT/GB2016/052943
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Thu Sep 22 01:59:59 CEST 2016
IPC: B01D 53/94
B01J 23/10
B01J 23/83
F01N 3/035
Applicants: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
Inventors: CHANDLER, Guy Richard
PHILLIPS, Paul Richard
Title: CATALYTIC FILTER HAVING A SOOT CATALYST AND AN SCR CATALYST
Abstract:
A catalytic filter is provided having a mixture of an SCR catalyst and soot oxidation catalyst where the soot oxidation catalyst is a copper doped ceria, iron doped ceria or manganese doped ceria. The mixture of an SCR catalyst and soot oxidation catalyst provides for a lowering of the peak oxidation temperature for soot removal from the filter. The use of the filter allows for improved soot combustion and reduces the susceptibility of an SCR catalyst contained on a filter to deterioration. The soot oxidation catalyst also improves the resistance of the SCR catalyst to poisoning and subsequent deterioration of SCR performance.