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:
Jun. 24, 2008
Filed:
Nov. 17, 2005
Anatoly Sobolevskiy, Orlando, FL (US);
Joseph A. Rossin, Columbus, OH (US);
Anatoly Sobolevskiy, Orlando, FL (US);
Joseph A. Rossin, Columbus, OH (US);
Siemens Power Generation, Inc., Orlando, FL (US);
Abstract
An exhaust gas treatment apparatus () for reducing the concentration of NO, HC and CO in an exhaust gas stream () such as produced by a gas turbine engine () of a power generating station (). The treatment apparatus includes a multifunction catalytic element () having an upstream reducing-only portion () and a downstream reducing-plus-oxidizing portion () that is located downstream of an ammonia injection apparatus (). The selective catalytic reduction (SCR) of NOis promoted in the upstream portion of the catalytic element by the injection of ammonia in excess of the stoichiometric concentration, with the resulting ammonia slip being oxidized in the downstream portion of the catalytic element. Any additional NOgenerated by the oxidation of the ammonia is further reduced in the downstream portion before being passed to the atmosphere ().