The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 2012
Filed:
Apr. 08, 2011
Joseph M. Fedeyko, Glen Mills, PA (US);
Hai-ying Chen, Conshohocken, PA (US);
Arthur J. Reining, Christiana, PA (US);
Joseph M. Fedeyko, Glen Mills, PA (US);
Hai-Ying Chen, Conshohocken, PA (US);
Arthur J. Reining, Christiana, PA (US);
Johnson Matthey Public Limited Company, London, GB;
Abstract
A system for reducing ammonia (NH) emissions includes (a) a first component comprising a first substrate containing a three-way catalyst, wherein the first component is disposed upstream of a second component comprising a second substrate containing an ammonia oxidation catalyst, wherein said ammonia oxidation catalyst comprises a small pore molecular sieve supporting at least one transition metal; and (b) an oxygen-containing gas input disposed between the components. For example, a CHA Framework Type small pore molecular sieve may be used. A method for reducing NHemission includes introducing an oxygen-containing gas into a gas stream to produce an oxygenated gas stream; and exposing the oxygenated gas stream to an NHoxidation catalyst to selectively oxidize at least a portion of the NHto N.