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:
Apr. 08, 2014
Filed:
May. 16, 2008
Anatoly Sobolevskiy, Orlando, FL (US);
Joseph A. Rossin, Columbus, OH (US);
Anatoly Sobolevskiy, Orlando, FL (US);
Joseph A. Rossin, Columbus, OH (US);
Siemens Energy, Inc., Orlando, FL (US);
Abstract
A multi-stage selective catalytic reduction (SCR) unit () provides efficient reduction of NOx and other pollutants from about 50-550° C. in a power plant (). Hydrogen () and ammonia () are variably supplied to the SCR unit depending on temperature. An upstream portion () of the SCR unit catalyzes NOx+NHreactions above about 200° C. A downstream portion () catalyzes NOx+Hreactions below about 260° C., and catalyzes oxidation of NH, CO, and VOCs with oxygen in the exhaust above about 200° C., efficiently removing NOx and other pollutants over a range of conditions with low slippage of NH. An ammonia synthesis unit () may be connected to the SCR unit to provide NHas needed, avoiding transport and storage of ammonia or urea at the site. A carbonaceous gasification plant () on site may supply hydrogen and nitrogen to the ammonia synthesis unit, and hydrogen to the SCR unit.