公开(公告)号：US20240424445A1

公开(公告)日：2024-12-26

申请号：US18692603

申请日：2022-09-08

Applicant: BASF CORPORATION

Inventor： Xiaolai ZHENG ,  Stephen JOHNSON ,  Yipeng SUN ,  Yuejin LI ,  Shiang SUNG ,  Chunxin JI ,  Pascaline TRAN ,  Pramod RAVINDRAN ,  Karifala DUMBUYA

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

Abstract: The present invention provides a catalytic article comprising a substrate: a bottom washcoat deposited on the substrate; and a top washcoat deposited on the bottom coat, wherein the bottom washcoat comprises a zoned configuration, wherein the zoned configuration comprises a first zone and a second zone, wherein the first zone comprises palladium supported on ceria-zirconia mixed oxide or alumina or both, wherein the second zone comprises platinum supported on a ceria-alumina composite, wherein the top washcoat comprises rhodium supported on an alumina or a ceria-alumina composite. The present invention also provides a process for the preparation of the catalytic article, and it use for purifying a gaseous exhaust stream.