Title:
CATALYST ARTICLE FOR OXIDIZING NITROGEN OXIDE, SYSTEM AND METHOD
Document Type and Number:
Japanese Patent JP2020182943
Kind Code:
A
Abstract:
To provide a catalyst article for treating lean burn engine exhaust gas.SOLUTION: A catalyst article contains a honeycomb base material, and a wash coat arranged thereon, in which the wash coat contains one or more baked platinum group metal components that are dispersed on a carrier of a fire-resistant metal oxide including alumina, silica, zirconia, titania and a physical mixture thereof or a chemical combination such as atomic doping, the wash coat is arranged on the honeycomb base material, an average fine crystal size of the platinum group metal component is within a range of approximately 10 nm to approximately 25 nm, when the exhaust gas passes through the honeycomb base material having the catalyst, a stable NO2/NOX ratio is obtained. There are also provided a method for treating exhaust gas from a lean burn engine, and a system for removing a contaminant from a lean burn engine exhaust gas flow containing NOX.SELECTED DRAWING: None
Inventors:
STANLEY A ROTH
Application Number:
JP2020113895A
Publication Date:
November 12, 2020
Filing Date:
July 01, 2020
Export Citation:
Assignee:
BASF CORP
International Classes:
B01J23/44; B01D53/94; B01J35/04; F01N3/10
Domestic Patent References:
| JP2006055768A | 2006-03-02 | |||
| JP2008272659A | 2008-11-13 | |||
| JP2001058131A | 2001-03-06 |
Attorney, Agent or Firm:
Satoshi Eto