Title:
Ag/Al2O3HC-SCR触媒上でのコーキングの低減
Document Type and Number:
Japanese Patent JP4938021
Kind Code:
B2
Abstract:
The present invention relates to a method of reducing coking over a Ag/Al2O3 hydrocarbon selective catalytic reduction catalyst in an exhaust stream of a lean burn internal combustion engine, the exhaust stream including hydrocarbon and NOx. The method includes controlling the hydrocarbon to molar NOx ratio of the exhaust stream so as to be within certain limits at certain temperatures. An exhaust system for a lean burn engine suited to the above method, and a lean burn internal combustion engine, or a vehicle or stationary power source including such an exhaust system are also included.
Inventors:
Raj, Rao, Rajaram
Asanasios, Zorakis
Valerie, Marie, Rene, Well
Asanasios, Zorakis
Valerie, Marie, Rene, Well
Application Number:
JP2008540702A
Publication Date:
May 23, 2012
Filing Date:
November 09, 2006
Export Citation:
Assignee:
JOHNSON MATTHEY PUBLIC LIMITED COMPANY
International Classes:
F01N3/36; B01D53/90; B01D53/94; F01N3/20
Domestic Patent References:
| JP2000093803A | 2000-04-04 | |||
| JP2004330191A | 2004-11-25 | |||
| JP2004506505A | 2004-03-04 |
Foreign References:
| US5534237A | 1996-07-09 |
Attorney, Agent or Firm:
Kenji Yoshitake
Yukitaka Nakamura
Konno Akio
Noritaka Yokota
Takeshi Katata
Yukitaka Nakamura
Konno Akio
Noritaka Yokota
Takeshi Katata