Title:
CATALYZED PARTICULATE FILTER
Document Type and Number:
WIPO Patent Application WO/2024/067620
Kind Code:
A1
Abstract:
A particulate filter, a gasoline engine emission treatment system comprising the particulate filter and a method for treating an exhaust from a gasoline engine, wherein the particulate filter 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 channels are outlet channels that are closed at the inlet end and open at the outlet end; 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; and optionally, an on-wall layer of inorganic particles in the inlet channels and/or outlet channels, wherein the inorganic particles comprise one or more non-PGM components selected from alumina, zirconia, ceria, silica, titania, magnesium oxide, manganese oxide, zinc oxide, rare earth metal oxide other than ceria, or any composite oxides thereof.
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Inventors:
CHEN CHUNYU (CN)
SIANI ATTILIO (DE)
WANG WEILIANG (CN)
SONG WENJI (CN)
SIANI ATTILIO (DE)
WANG WEILIANG (CN)
SONG WENJI (CN)
Application Number:
PCT/CN2023/121661
Publication Date:
April 04, 2024
Filing Date:
September 26, 2023
Export Citation:
Assignee:
BASF CORP (US)
BASF CHINA LTD (CN)
BASF CHINA LTD (CN)
International Classes:
B01D53/94; B01J21/04; B01J23/00; B01J23/46; B01J23/63; B01J37/02; F01N3/035
Domestic Patent References:
WO2021096841A1 | 2021-05-20 |
Foreign References:
US20190009254A1 | 2019-01-10 | |||
US20210396167A1 | 2021-12-23 | |||
CN111683733A | 2020-09-18 | |||
CN108350777A | 2018-07-31 | |||
CN101970817A | 2011-02-09 | |||
CN112601600A | 2021-04-02 | |||
CN1342101A | 2002-03-27 |
Attorney, Agent or Firm:
ZHONGZI LAW OFFICE (CN)
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