公开(公告)号：US20230330638A1

公开(公告)日：2023-10-19

申请号：US18044647

申请日：2021-09-09

Applicant: BASF CORPORATION

Inventor： Chun Yu CHEN ,  Xiaolai ZHENG ,  Wei Liang WANG ,  Attilio SIANI ,  Pascaline TRAN

IPC: B01J23/46 ,  B01J23/44 ,  B01J23/10 ,  B01J21/04 ,  B01J35/00 ,  B01J37/02 ,  B01D53/94 ,  F01N3/28

CPC classification number: B01J23/464 ,  B01J23/44 ,  B01J23/10 ,  B01J21/04 ,  B01J35/0006 ,  B01J35/0066 ,  B01J37/0244 ,  B01J37/0228 ,  B01D53/945 ,  B01D53/9472 ,  B01D53/9468 ,  F01N3/2825 ,  B01D2255/1023 ,  B01D2255/1025 ,  B01D2255/1021 ,  B01D2255/9032 ,  B01D2255/9022 ,  B01D2255/908 ,  B01D2255/407 ,  B01D2258/01 ,  B01D2257/502 ,  B01D2257/702 ,  B01D2257/404 ,  F01N2370/02 ,  F01N2330/06 ,  F01N2510/0684

Abstract: Described herein is a layered catalytic article which includes a) a top layer including a front zone and a rear zone, where the front zone includes a palladium component and a rhodium component, supported individually or together on a support, and the rear zone includes a platinum component, a rhodium component and optionally a palladium component, supported individually or together on a support; b) a bottom layer including a platinum component and a palladium component supported individually or together on a support; and c) a substrate. Also described herein are an exhaust treatment system including the layered catalytic article and a method of using the layered catalytic article for abatement of hydrocarbons, carbon monoxide and nitrogen oxides in an exhaust stream.