Title:
セラミックフィルタおよび触媒付セラミックフィルタ
Document Type and Number:
Japanese Patent JP3997825
Kind Code:
B2
Abstract:
The present invention provides a catalyst-loaded ceramic filter that is made of a ceramic material capable of directly supporting a catalyst component thereon, and is capable of providing early activation of the catalyst with a low coefficient of thermal expansion and light weight, without compromising the high porosity of the filter substrate. According to the present invention, a catalyst-loaded ceramic filter is made of a ceramic material of which one or more kinds of element among the constituent elements thereof is substituted with element other than the constituent elements, for example a ceramic material with a part of Si or other elements included in cordierite is substituted with W or Co, as a filter substrate of honeycomb structure having a number of cells separated by porous walls, and supporting a catalyst such as a noble metal directly on the W. This constitution has advantages that there occurs no increase in the pressure loss, coefficient of thermal expansion or weight due to the formation of a coating layer, and that the heat capacity remains low.
Inventors:
Seiichi Tanaka
Toshiharu Kondo
Hiromi Sano
Nishimura Yo
Toshiharu Kondo
Hiromi Sano
Nishimura Yo
Application Number:
JP2002116725A
Publication Date:
October 24, 2007
Filing Date:
April 18, 2002
Export Citation:
Assignee:
株式会社デンソー
International Classes:
B01J35/04; B01D39/14; F01N3/02; B01D39/20; B01D53/94; B01J21/16; B01J32/00; C04B35/10; C04B35/195; C04B38/00; C04B41/85; F01N3/022; F01N3/035
Domestic Patent References:
| JP9077573A | ||||
| JP7242465A | ||||
| JP9173866A | ||||
| JP2001310128A | ||||
| JP2000001365A | ||||
| JP11192430A | ||||
| JP2001046870A | ||||
| JP2000246105A |
Foreign References:
| EP1043067A1 | ||||
| WO2000027508A1 |
Attorney, Agent or Firm:
Motomu Itou