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.