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Title:
CATALYZED PARTICULATE FILTER
Document Type and Number:
WIPO Patent Application WO/2024/067621
Kind Code:
A1
Abstract:
The present invention relates to a particulate filter, which comprises a substrate, comprising a plurality of porous walls extending longitudinally to form a plurality of parallel channels extending from an inlet end to an outlet end, wherein a quantity of the channels are inlet channels that are open at the inlet end and closed at the outlet end, and a quantity of the channels are outlet channels that are closed at the inlet end and open at the outlet end; and an in-wall TWC coating in the inlet channels and the outlet channels, comprising a platinum group metal component, an alumina-based refractory metal oxide and an oxygen storage component, wherein the in-wall TWC coating has a weight ratio of the alumina-based refractory metal oxide to the oxygen storage component in the range of 1:20 to 1:3, and wherein the in-wall TWC coating is free of any individual zirconium species and barium species. The present invention also relates to a gasoline engine emission treatment system comprising the catalyzed particulate filter and a method for treating exhaust from a gasoline engine.

Inventors:
CHEN CHUNYU (CN)
SIANI ATTILIO (DE)
WANG WEILIANG (CN)
SONG WENJI (CN)
Application Number:
PCT/CN2023/121665
Publication Date:
April 04, 2024
Filing Date:
September 26, 2023
Export Citation:
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Assignee:
BASF CORP (US)
BASF CHINA LTD (CN)
International Classes:
F01N13/00; B01J21/04; B01J23/10; B01J23/56; B01J35/00
Foreign References:
CN108602050A2018-09-28
CN114364458A2022-04-15
CN111683734A2020-09-18
CN111491726A2020-08-04
CN104411930A2015-03-11
Attorney, Agent or Firm:
ZHONGZI LAW OFFICE (CN)
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