公开(公告)号：US20250050318A1

公开(公告)日：2025-02-13

申请号：US18723684

申请日：2022-12-26

Applicant: BASF CORPORATION

Inventor： Chenghao SUN ,  Xiaoshuang YANG ,  Chengwei SONG ,  Shau Lin CHEN ,  Gianluca VOLANTE ,  Xiaolai ZHENG ,  Markus KINNE

IPC: B01J35/00 ,  B01D53/94 ,  B01J21/04 ,  B01J23/10 ,  B01J23/63 ,  B01J37/00 ,  B01J37/02 ,  B01J37/08 ,  F01N3/10 ,  F01N3/28

Abstract: The present invention relates to a rhodium-free TWC catalytic article, which comprises a catalyst composition coat on a substrate, wherein the catalyst composition coat comprises, —a first region comprising i). a top layer comprising a first platinum component and a first palladium component, each being present in supported form, and ii). a bottom layer comprising a second platinum component in supported form, and—optionally, a second region located downstream of the first region, and comprising iii). a top layer comprising a third platinum component in supported form, and iv). a bottom layer comprising a fourth platinum component in supported form. The present invention relates to an exhaust treatment system comprising the rhodium-free TWC catalytic article.

公开(公告)号：US20220118405A1

公开(公告)日：2022-04-21

申请号：US17452826

申请日：2021-10-29

Applicant: BASF Corporation

Inventor： Janosch CRAVILLON ,  Stephan SIEMUND ,  Attilio SIANI ,  Thomas SCHMITZ ,  Markus KINNE

IPC: B01D53/94 ,  B01J23/63 ,  F01N3/10 ,  F01N3/035 ,  B01J37/02 ,  B01J35/00 ,  B01J23/46 ,  B01J35/10 ,  B01J35/04

Abstract: Catalyzed particulate filters comprise three-way conversion (TWC) catalytic material, which comprises rhodium as the only platinum group metal, that permeates walls of a particulate filter. Such catalyzed particulate filters may be located downstream of close-coupled three-way conversion (TWC) composites in an emission treatment system downstream of a gasoline direct injection engine for treatment of an exhaust stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, and particulates.