公开(公告)号：US11331651B2

公开(公告)日：2022-05-17

申请号：US16123211

申请日：2018-09-06

申请人： UMICORE AG & CO. KG

发明人： Ryan J. Andersen ,  John G. Nunan ,  Curt M. Ellis ,  Geon Seog Son

IPC分类号： B01J23/42 ,  B01J21/04 ,  B01J21/06 ,  B01J21/08 ,  B01J21/10 ,  B01J23/44 ,  B01J23/46 ,  F01N3/035 ,  F01N3/10

摘要： The present invention relates to a catalyst comprising a carrier substrate of the length L extending between substrate ends a and b and three washcoat zones A, B and C wherein washcoat zone A comprises one or more first platinum group metals and extends starting from substrate end a over a part of the length L,
washcoat zone C comprises one or more first platinum group metals and extends starting from substrate end b over a part of the length L, and washcoat zone B comprises the same components as washcoat zone A and in addition, one or more second platinum group metals and extends between washcoat zones A and C, wherein L=LA+LB+LC, wherein LA is the length of washcoat zone A, LB is the length of substrate length B and LC is the length of substrate length C.