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Nox reduction system utilizing pulsed hydrocarbon injection

United States Patent

March 20, 2001
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
Hydrocarbon co-reductants, such as diesel fuel, are added by pulsed injection to internal combustion engine exhaust to reduce exhaust NO.sub.x to N.sub.2 in the presence of a catalyst. Exhaust NO.sub.x reduction of at least 50% in the emissions is achieved with the addition of less than 5% fuel as a source of the hydrocarbon co-reductants. By means of pulsing the hydrocarbon flow, the amount of pulsed hydrocarbon vapor (itself a pollutant) can be minimized relative to the amount of NO.sub.x species removed.
Brusasco; Raymond M. (Livermore, CA), Penetrante; Bernardino M. (San Ramon, CA), Vogtlin; George E. (Fremont, CA), Merritt; Bernard T. (Livermore, CA)
The Regents of the University of California (Oakland, CA)
09/ 334,191
June 16, 1999
The United States Government has rights in this invention pursuant to Contract No. W-7405-ENG-48 between the United States Department of Energy and the University of California for the operation of Lawrence Livermore National Laboratory.