Is a
Patent attributes
Patent Applicant
0
Patent Jurisdiction
Patent Number
Patent Inventor Names
Clifford Norman Montreuil0
Michiel J. van Nieuwstadt0
Paul J. Tennison0
Date of Patent
May 17, 2005
0Patent Application Number
103014450
Date Filed
November 21, 2002
0Patent Citations Received
Patent Primary Examiner
Patent 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.
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