公开(公告)号：US11946405B2

公开(公告)日：2024-04-02

申请号：US17250544

申请日：2019-08-30

申请人： BASF Corporation

发明人： David Schlereth ,  Hao Li ,  Stephen Siemund ,  Thomas Schmitz ,  Attilio Siani ,  Florian Waltz

IPC分类号： B01J21/04 ,  B01J21/06 ,  B01J23/02 ,  B01J23/04 ,  B01J23/10 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  B01J35/00 ,  B01J35/04 ,  F01N3/022 ,  F01N3/035 ,  F01N3/10

CPC分类号： F01N3/035 ,  B01J23/63 ,  F01N3/022 ,  F01N3/101 ,  B01J21/04 ,  B01J21/066 ,  F01N2370/02 ,  F01N2510/06 ,  F01N2570/10 ,  F01N2570/12 ,  F01N2570/14

摘要： The present invention relates to a four-way conversion catalyst for the treatment of an exhaust gas stream of a gasoline engine, the catalyst comprising a porous wall-flow filter substrate comprising an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of passages defined by porous internal walls of the porous wallflow filter substrate, wherein the plurality of passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end, wherein the interface between the passages and the porous internal walls is defined by the surface of the internal walls; wherein the porous internal walls comprise pores which comprise an oxidic component comprising a first refractory metal oxide, said first refractory metal oxide comprising aluminum, said oxidic component having a platinum group metal content in the range of from 0 to 0.001 weight-% based on the total weight of the oxidic component; wherein the catalyst further comprises a first three-way conversion catalytic coating, at least weight-% thereof being comprised in the pores of the internal walls, said first three-way conversion catalytic coating comprising an oxygen storage compound and a platinum group metal supported on a second refractory metal oxide.

公开(公告)号：US11992806B2

公开(公告)日：2024-05-28

申请号：US16965449

申请日：2019-02-04

申请人： BASF Corporation

发明人： Florian Waltz ,  Attilio Siani ,  Thomas Schmitz ,  Stephan Siemund ,  David Schlereth ,  Hao Li

IPC分类号： B01J21/04 ,  B01D53/94 ,  B01J23/10 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46 ,  B01J23/63 ,  F01N3/022 ,  F01N3/035 ,  F01N3/10

CPC分类号： B01D53/945 ,  B01J23/63 ,  F01N3/022 ,  F01N3/035 ,  F01N3/101 ,  B01D2255/102 ,  B01D2255/206 ,  B01D2255/407 ,  B01D2255/9155 ,  F01N2330/06

摘要： A four-way conversion catalyst for the treatment of an exhaust gas stream of a gasoline engine, the catalyst comprising a porous wall flow filter substrate comprising an inlet end, an outlet end, a substrate axial length extending between the inlet end and the outlet end, and a plurality of passages defined by porous internal walls of the porous wall flow filter substrate, wherein the plurality of passages comprise inlet passages having an open inlet end and a closed outlet end, and outlet passages having a closed inlet end and an open outlet end; wherein in the pores of the porous internal walls and on the surface of the porous internal walls, which surface defines the interface between the porous internal walls and the passages, the catalyst comprises a three-way conversion catalytic coating comprising an oxygen storage compound and a platinum group metal supported on a refractory metal oxide; wherein in the pores of the porous internal walls, the three-way conversion catalytic coating is present as in-wall-coating and on the surface of the porous internal walls, the three-way conversion catalytic coating is present as on-wall-coating; wherein in addition to said three-way conversion catalytic coating, the catalyst comprises no further coating in the pores of the porous internal walls and no further coating on the surface of the porous internal walls.