Title:
EXHAUST GAS CLEANING CATALYST AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2004033872
Kind Code:
A
Abstract:
To prevent poisoning of an NOx absorbent which absorbs NOx in exhaust gas by sulfur compounds in the exhaust gas.
An inside catalyst layer 11 has a catalyst material obtained by carrying Pt, Rh and an NOx absorbent (Ba, Mg, Sr, K) on γ-alumina and Ce-Pr multiple oxide as a support material and is formed using an alumina binder. An outside catalyst layer 12 has a catalyst material obtained by carrying Pt, Rh and an NOx absorbent (Ba, Mg, Sr, K) on γ-alumina as a support material and is formed using a ceria binder.
Inventors:
MIYOSHI SEIJI
YAMADA KEIJI
TAKAMI AKIHIDE
YAMADA KEIJI
TAKAMI AKIHIDE
Application Number:
JP2002192858A
Publication Date:
February 05, 2004
Filing Date:
July 02, 2002
Export Citation:
Assignee:
MAZDA MOTOR
International Classes:
B01D53/94; B01J23/58; (IPC1-7): B01J23/58; B01D53/94
Attorney, Agent or Firm:
Hiroshi Maeda
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Teshima Masaru
Atsushi Fujita
Hiroshi Koyama
Hiroshi Takeuchi
Takahisa Shimada
Yuji Takeuchi
Katsumi Imae
Teshima Masaru
Atsushi Fujita
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