Title:
【発明の名称】ディーゼルエンジンの排気浄化触媒
Document Type and Number:
Japanese Patent JP3371427
Kind Code:
B2
Abstract:
Exhaust emission control catalyst for diesel engines comprises: (a) a carrier backing material; (b) on a surface of this, a metallic carrier layer supporting a catalytic metal; and (c) a 170 mu m or less thick diffusion suppressing layer on the surface of the metallic carrier layer opposite to the carrier backing material. Pref. the metallic carrier layer is porous and the diffusion suppressing layer has smaller pore size than the metallic catalytic layer; a catalytic metal with weaker oxidising strength than the above catalytic metal is supported on the diffusion suppressing layer; an SO2 trapping catalytic metal is supported on the diffusion suppressing layer; and a diffusion suppressing layer is placed between the carrier backing material and the metallic carrier layer.
Inventors:
Toshiaki Tanaka
Yoshio Fujimoto
Nobumoto Ohashi
Shinichi Takeshima
Kazuhiro Ito
Yoshio Fujimoto
Nobumoto Ohashi
Shinichi Takeshima
Kazuhiro Ito
Application Number:
JP50959998A
Publication Date:
January 27, 2003
Filing Date:
August 13, 1997
Export Citation:
Assignee:
TOYOTA JIDOSHA KABUSHIKI KAISHA
International Classes:
B01D53/94; B01J23/40; B01J33/00; B01J35/04; B01J35/10; B01J37/02; B01J37/025; (IPC1-7): B01J23/40; B01D53/94; B01J33/00
Domestic Patent References:
| JP4358539A | ||||
| JP557191A |
Attorney, Agent or Firm:
Takashi Ishida (2 outside)