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1. (WO2018042181) IMPROVED NOx TRAP

Pub. No.:    WO/2018/042181    International Application No.:    PCT/GB2017/052538
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Sat Sep 02 01:59:59 CEST 2017
IPC: F01N 3/08
F01N 3/28
B01D 53/94
Applicants: JOHNSON MATTHEY PUBLIC LIMITED COMPANY
Inventors: CHANDLER, Guy Richard
PHILLIPS, Paul Richard
REID, Stuart David
STREHLAU, Wolfgang
SWALLOW, Daniel
Title: IMPROVED NOx TRAP
Abstract:
A NOx trap catalyst is disclosed. The NOx trap catalyst comprises a noble metal, a NOx storage component, a support, and a first ceria-containing material. The first ceria-containing material is pre-aged prior to incorporation into the NOx trap catalyst, and may have a surface area of less than 80 m2/g. The invention also includes exhaust systems comprising the NOx trap catalyst, and a method for treating exhaust gas utilizing the NOx trap catalyst.