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. 29, 2010
Filed:
Sep. 01, 2006
Mohan Kalyanaraman, Media, PA (US);
Paul W. Park, Peoria, IL (US);
Christie S. Ragle, Havana, IL (US);
Mohan Kalyanaraman, Media, PA (US);
Paul W. Park, Peoria, IL (US);
Christie S. Ragle, Havana, IL (US);
ExxonMobil Research And Engineering Co., Annandale, NJ (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
A method and apparatus for catalytically processing a gas stream passing therethrough to reduce the presence of NOtherein, wherein the apparatus includes a first catalyst composed of a silver-containing alumina that is adapted for catalytically processing the gas stream at a first temperature range, a second catalyst composed of a copper-containing zeolite located downstream from the first catalyst, wherein the second catalyst is adapted for catalytically processing the gas stream at a lower second temperature range relative to the first temperature range, a hydrocarbon compound for injection into the gas stream upstream of the first catalyst to provide a reductant, and a reformer for reforming a portion of the hydrocarbon compound into Hand/or oxygenated hydrocarbon for injection into the gas stream upstream of the first catalyst. The second catalyst is adapted to facilitate the reaction of reducing NOx into N, whereby the intermediates are produced via the first catalyst reacting with NOx and hydrocarbons.