CATALYZED PARTICULATE FILTER

WIPO Patent Application WO/2024/067618

A1

A 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, which comprises inorganic particles having a small BET pore volume of no more than 0.5 cm 3/g. A gasoline engine emission treatment system comprising the particulate filter and a method for treating an exhaust from a gasoline engine are also disclosed.

CHEN CHUNYU (CN)
SIANI ATTILIO (DE)
WANG WEILIANG (CN)
SONG WENJI (CN)

PCT/CN2023/121658

April 04, 2024

September 26, 2023

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BASF CORP (US)
BASF CHINA CO LTD (CN)

F01N3/022; B01D53/94; F01N3/035

WO2022129010A1	2022-06-23
WO2022129027A1	2022-06-23

CN111683733A	2020-09-18
CN105008025A	2015-10-28
US20140161693A1	2014-06-12
CN104838099A	2015-08-12

ZHONGZI LAW OFFICE (CN)

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