公开(公告)号：US20220118405A1

公开(公告)日：2022-04-21

申请号：US17452826

申请日：2021-10-29

Applicant: BASF Corporation

Inventor： Janosch CRAVILLON ,  Stephan SIEMUND ,  Attilio SIANI ,  Thomas SCHMITZ ,  Markus KINNE

IPC: B01D53/94 ,  B01J23/63 ,  F01N3/10 ,  F01N3/035 ,  B01J37/02 ,  B01J35/00 ,  B01J23/46 ,  B01J35/10 ,  B01J35/04

Abstract: Catalyzed particulate filters comprise three-way conversion (TWC) catalytic material, which comprises rhodium as the only platinum group metal, that permeates walls of a particulate filter. Such catalyzed particulate filters may be located downstream of close-coupled three-way conversion (TWC) composites in an emission treatment system downstream of a gasoline direct injection engine for treatment of an exhaust stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, and particulates.

公开(公告)号：US20200368727A1

公开(公告)日：2020-11-26

申请号：US16966319

申请日：2019-02-04

Applicant: BASF Corporation ,  BASF SE

Inventor： Thomas SCHMITZ ,  Attilio SIANI ,  Stephan SIEMUND ,  Janosch CRAVILLON

IPC: B01J23/63 ,  B01J23/58 ,  B01J35/04 ,  B01J35/00 ,  B01J35/10 ,  B01J37/02 ,  B01J37/00 ,  B01D53/94 ,  F01N3/28 ,  F01N3/10

Abstract: A four-way conversion catalyst for treating a gasoline engine exhaust gas has a porous wall flow filter substrate with an inlet end, outlet end, substrate axial length extending between the inlet and outlet end, and passages defined by porous internal walls of the substrate, the passages having inlet passages with an open inlet and closed outlet, and outlet passages having a closed inlet and open outlet. The internal wall pores have a three-way conversion catalytic in-wall coating with an oxygen storage compound and a platinum group metal supported on a refractory metal oxide. On at least a portion of the internal wall surface defining the interface between the internal walls and the passages, the catalyst has a porous on-wall coating from the internal wall surface to the passage. The coating has porous oxidic compound and platinum group metal content of 0 to 0.001 wt. %, of the total coating weight.

公开(公告)号：US20200182115A1

公开(公告)日：2020-06-11

申请号：US16322171

申请日：2017-07-25

Applicant: BASF Corporation

Inventor： Janosch CRAVILLON ,  Stephan SIEMUND ,  Attilio SIANI ,  Thomas SCHMITZ ,  Oliver SEEL ,  Knut WASSERMANN

IPC: F01N3/10 ,  F01N3/28 ,  F01N3/035 ,  B01D46/00 ,  F01N3/022 ,  B01D46/24 ,  B01D53/94 ,  B01J35/04 ,  B01J35/10 ,  B01J37/04 ,  B01J37/02 ,  B01J37/08 ,  B01J21/04 ,  B01J23/58

Abstract: Catalyzed particulate filters comprise three-way conversion (TWC) catalytic material that permeates walls of a particulate filter such that the catalyzed particulate filter has a coated porosity that is less than an uncoated porosity of the particulate filter. The coated porosity is linearly proportional to a washcoat loading of the TWC catalytic material. A coated backpressure is non-detrimental to performance of the engine. Such catalyzed particulate filters may be used in an emission treatment system downstream of a gasoline direct injection engine for treatment of an exhaust stream comprising hydrocarbons, carbon monoxide, nitrogen oxides, and particulates.