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:
Aug. 11, 2015
Filed:
Apr. 23, 2012
Applicant:
Anatoly Sobolevskiy, Orlando, FL (US);
Inventor:
Anatoly Sobolevskiy, Orlando, FL (US);
Assignee:
Siemens Energy, Inc., Orlando, FL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F02C 3/00 (2006.01); B01J 23/652 (2006.01); B01D 53/58 (2006.01); B01D 53/86 (2006.01); B01J 35/00 (2006.01); B01J 23/22 (2006.01); B01J 23/28 (2006.01); B01J 23/30 (2006.01); F02C 3/28 (2006.01); B01D 53/94 (2006.01);
U.S. Cl.
CPC ...
B01D 53/8628 (2013.01); B01D 53/9472 (2013.01); B01J 23/22 (2013.01); B01J 23/28 (2013.01); B01J 23/30 (2013.01); B01J 23/6527 (2013.01); B01J 35/0006 (2013.01); F02C 3/28 (2013.01); B01D 53/9418 (2013.01); B01D 2251/2062 (2013.01); B01D 2255/1021 (2013.01); B01D 2255/1023 (2013.01); B01D 2255/20707 (2013.01); B01D 2255/20723 (2013.01); B01D 2255/20776 (2013.01); B01D 2255/30 (2013.01); B01D 2255/9032 (2013.01); C10J 2300/165 (2013.01); C10J 2300/1653 (2013.01); F05D 2220/722 (2013.01); Y02E 20/16 (2013.01); Y02E 20/18 (2013.01);
Abstract
An exhaust gas treatment process, apparatus, and system for reducing the concentration of NOx, CO and hydrocarbons in a gas stream, such as an exhaust stream (), via selective catalytic reduction with ammonia is provided. The process, apparatus and system include a catalytic bed () having a reducing only catalyst portion () and a downstream reducing-plus-oxidizing portion (). Each portion () includes an amount of tungsten. The reducing-plus-oxidizing catalyst portion () advantageously includes a greater amount of tungsten than the reducing catalyst portion () to markedly limit ammonia salt formation.