公开(公告)号：US20220203339A1

公开(公告)日：2022-06-30

申请号：US17595335

申请日：2020-06-23

Applicant: BASF Corporation

Inventor： Xiaolai ZHENG ,  Aleksei VJUNOV ,  Michel DEEBA ,  Shiang SUNG ,  Pascaline TRAN

IPC: B01J23/46 ,  B01J35/00 ,  B01J37/03 ,  B01J37/08 ,  B01J23/44 ,  B01J21/04 ,  B01J23/10 ,  B01J35/04 ,  B01J23/02 ,  B01D53/94 ,  F01N3/28 ,  F01N3/10 ,  F01N13/00

Abstract: The presently claimed invention provides a layered catalytic article and an exhaust system. The catalytic article comprises a first layer comprising platinum, a first platinum group metal component other than platinum, a ceria-alumina composite, and an oxygen storage component; wherein platinum is supported on the ceria-alumina component; the platinum group metal component is selected from palladium, rhodium or a combination thereof and the platinum group metal component is supported on the oxygen storage component; a second layer comprising a second platinum group metal component; and a refractory alumina component, an oxygen storage component or a combination thereof; wherein the second platinum group component is selected from platinum, palladium, rhodium or a combination thereof; and a substrate, wherein the amount of platinum is 10 to 80 wt. %, based on the total weight of platinum, palladium and rhodium. The presently claimed invention also provides a process for the preparation of a layered catalytic article and use of the catalytic article and the exhaust system for purifying a gaseous exhaust stream comprising hydrocarbons, carbon monoxide, and nitrogen oxides.

公开(公告)号：US20210283580A1

公开(公告)日：2021-09-16

申请号：US17250187

申请日：2019-06-11

Applicant: BASF Corporation ,  Heesung Catalysts Corporation

Inventor： Xiaolai ZHENG ,  Patrick L. BURK ,  Jinwoo SONG ,  Jun LEE

IPC: B01J23/46 ,  B01J21/04 ,  B01J23/44 ,  B01J21/06 ,  B01J23/04 ,  B01J35/00 ,  B01J35/04 ,  B01J35/02 ,  B01J35/10 ,  B01D53/94 ,  F01N3/18 ,  F01N3/28

Abstract: This disclosure is directed to catalyst compositions, catalytic articles for purifying exhaust gas emissions and methods of making and using the same. In particular, the disclosure relates to a catalytic article including a catalytic material on a substrate, wherein the catalytic material has a first layer and a second layer. The first layer provides effective lean NOx trap functionality and the second layer provides effective three-way conversion of carbon monoxide, hydrocarbons, and nitrogen oxides (NOx).