CATALYZED PARTICULATE FILTER

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)

Application Number:

PCT/CN2023/121661

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:

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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