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Title:
HEXAGONAL-CELL HONEYCOMB CATALYST BODY, AND EXHAUST EMISSION CONTROL SYSTEM USING THE SAME
Document Type and Number:
Japanese Patent JP2009011976
Kind Code:
A
Abstract:

To provide a hexagonal-cell honeycomb catalyst body capable of effectively cleaning especially HC in the exhaust gas, and an exhaust emission control system using the same.

The hexagonal-cell honeycomb catalyst body 1 includes a hexagonal-cell honeycomb carrier 2 having a hexagonal lattice-shaped cell wall 21 and a plurality of hexagonal-shaped calls 22, and a catalyst cleaning layer 3 provided on the surface 211 of the cell wall 21 of the hexagonal-cell honeycomb carrier 2. The catalyst cleaning layer 3 comprises an HC adsorption layer 4 containing HC adsorption material, and a three-way catalyst layer 5 containing catalyst material. When the thickness of the HC adsorption layer 4 and the three-way catalyst layer 5 in the thinnest part 31 of the catalyst cleaning layer 3 are a1 and b1, respectively, and the thickness of the HC adsorption layer 4 and the three-way catalyst layer 5 in the thickest part 32 of the catalyst cleaning layer 3 are a2 and b2, respectively, (a1/b1) and (a2/b2) are both in a range of 1/20 to 5/1.


Inventors:
Murata, Masakazu
Ando, Yoshiyasu
Nakada, Shingo
Nakano, Tomoaki
Hirai, Akimasa
Taki, Kenichi
Yabusaki, Yuji
Application Number:
JP2007000178753
Publication Date:
January 22, 2009
Filing Date:
July 06, 2007
Export Citation:
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Assignee:
DENSO CORP
CATALER CORP
International Classes:
B01J29/068; B01D53/94; B01J35/04; C04B35/195; C04B41/89; F01N3/10; F01N3/28; F02D41/04; F02P5/14
Domestic Patent References:
JP2004169563A2004-06-17
JP2006006995A2006-01-12
JPH11104462A1999-04-20
JP2003206801A2003-07-25
JPH0256247A1990-02-26
JP2001286769A2001-10-16
JP2001079423A2001-03-27
JP2003200063A2003-07-15
JP2001164930A2001-06-19
Attorney, Agent or Firm:
高橋 祥泰
岩倉 民芳
高橋 祥起