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:
May. 17, 2005
Filed:
Nov. 21, 2002
Clifford Norman Montreuil, Livonia, MI (US);
Michiel J. Van Nieuwstadt, Ann Arbor, MI (US);
Paul J. Tennison, Oak Park, MI (US);
Clifford Norman Montreuil, Livonia, MI (US);
Michiel J. van Nieuwstadt, Ann Arbor, MI (US);
Paul J. Tennison, Oak Park, MI (US);
Ford Global Technologies, LLC, Dearborn, MI (US);
Abstract
A method for improving NOx conversion efficiency of a urea base SCR catalyst is presented. Since efficiency is reduced by the presence of hydrocarbons in the catalyst, the method proposes to regenerate the SCR by maintaining its temperature above the boiling point of hydrocarbons for a sufficient period of time to free up catalyst storage sites. The regeneration process is followed by over-injection of ammonia to replenish the ammonia released from the SCR catalyst due to high regeneration temperatures.