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. 26, 2014
Filed:
Jul. 10, 2013
Ajit B. Dandekar, Falls Church, VA (US);
Richard F. Socha, Yardley, PA (US);
Richard L. Eckes, Madison, NJ (US);
S. Beau Waldrup, Lumberton, TX (US);
Ajit B. Dandekar, Falls Church, VA (US);
Richard F. Socha, Yardley, PA (US);
Richard L. Eckes, Madison, NJ (US);
S. Beau Waldrup, Lumberton, TX (US);
ExxonMobil Research and Engineering Company, Annandale, NJ (US);
Abstract
Methods and systems are provided for selective catalytic reduction of NOx with a low molecular low molecular weight hydrocarbon, e.g., propylene, as a reductant using a catalyst system including two catalysts. An exhaust stream containing an amount of NOx from a combustion operation is provided. A portion of the exhaust stream and a reductant stream including a low molecular weight hydrocarbon is introduced to a first catalytic reactor, which comprises a first catalyst including alumina loaded with silver. The NOx-reduced exhaust stream from the first catalyst is then directed to a second catalyst including zirconia loaded with at least one metal.