公开(公告)号：US11872542B2

公开(公告)日：2024-01-16

申请号：US17626135

申请日：2020-07-09

Applicant: BASF CORPORATION

Inventor： Weiyong Tang ,  Sandip D. Shah ,  Andreas R. Munding ,  Fabien A. Rioult ,  Ramesh Murlidhar Kakwani

IPC: B01J21/04 ,  B01J23/42 ,  B01J23/44 ,  F01N3/20

CPC classification number: B01J23/44 ,  B01J21/04 ,  B01J23/42 ,  F01N3/2066 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14

Abstract: A catalyst article is provided including a substrate including a plurality of passageways, and further including a first and a second oxidation region including a first and a second subset of said plurality of passageways. A first catalyst composition is coating at least a portion of each passageway of the first oxidation region and positioned as a sole PGM-containing catalyst layer, or a zoned portion thereof, or as a top PGM-containing catalyst layer, or a zoned portion thereof, in the first oxidation region. A second catalyst composition is coating at least a portion of each passageway of the second oxidation region and positioned as a sole PGM-containing catalyst layer, or a zoned portion thereof, or as a top PGM-containing catalyst layer, or a zoned portion thereof, in the second oxidation region. The Pt:Pd weight ratio is greater in the first catalyst composition than in the second catalyst composition.

公开(公告)号：US20220258137A1

公开(公告)日：2022-08-18

申请号：US17626135

申请日：2020-07-09

Applicant: BASF CORPORATION

Inventor： Weiyong Tang ,  Sandip D. Shah ,  Andreas R. Munding ,  Fabien A. Rioult ,  Ramesh Murlidhar Kakwani

IPC: B01J23/44 ,  B01J23/42 ,  B01J21/04 ,  F01N3/20

Abstract: A catalyst article is provided including a substrate including a plurality of passageways, and further including a first and a second oxidation region including a first and a second subset of said plurality of passageways. A first catalyst composition is coating at least a portion of each passageway of the first oxidation region and positioned as a sole PGM-containing catalyst layer, or a zoned portion thereof, or as a top PGM-containing catalyst layer, or a zoned portion thereof, in the first oxidation region. A second catalyst composition is coating at least a portion of each passageway of the second oxidation region and positioned as a sole PGM-containing catalyst layer, or a zoned portion thereof, or as a top PGM-containing catalyst layer, or a zoned portion thereof, in the second oxidation region. The Pt:Pd weight ratio is greater in the first catalyst composition than in the second catalyst composition.