Title:
The catalyst for emission gas purification
Document Type and Number:
Japanese Patent JP6050703
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an OSC (oxygen storage capacity) material with heat resistance which can suppress agglomeration of catalyst metal and deterioration of an OSC function by suppressing crystal growth of crystallites, and to provide an exhaust gas purifying catalyst comprising the OSC material.SOLUTION: An exhaust gas purifying catalyst includes a carrier comprising an oxide functioning as an OSC material. The carrier comprises oxide particles in which the following two kinds of crystallites coexist: crystallites A comprising an oxide containing at least one of zirconium (Zr) and cerium (Ce); and crystallites B comprising an oxide containing at least one of zirconium (Zr) and cerium (Ce). The content (mol%) of Zr and/or Ce in the oxide of the crystallites B is different from that in the oxide of the crystallites A. The specific surface area of the oxide particles after heat treatment at 1,150°C for 5 hours in the atmosphere is 35 m/g or more.
Inventors:
Satoshi Matsueda
Akira Masai
Kenichi Taki
Takashi Goto
Hoshino
Satoru Inoda
Akira Masai
Kenichi Taki
Takashi Goto
Hoshino
Satoru Inoda
Application Number:
JP2013046638A
Publication Date:
December 21, 2016
Filing Date:
March 08, 2013
Export Citation:
Assignee:
Cataler Co., Ltd.
International Classes:
B01J23/63; B01D53/94; B01J35/10
Domestic Patent References:
| JP2009090237A | ||||
| JP2005313029A | ||||
| JP2009537432A |
Foreign References:
| US20070197373 | ||||
| WO2012105454A1 | ||||
| US20140037524 | ||||
| US4760044 | ||||
| US20100040523 |
Attorney, Agent or Firm:
Makoto Abe
Michiko Oi
Michiko Oi