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Method for generating a highly reactive plasma for exhaust gas aftertreatment and enhanced catalyst reactivity

United States Patent

July 23, 2002
View the Complete Patent at the US Patent & Trademark Office
Oak Ridge National Laboratory - Visit the Partnerships Directorate Website
A method for non-thermal plasma aftertreatment of exhaust gases the method comprising the steps of providing short risetime, high frequency, high power bursts of low-duty factor microwaves sufficient to generate a plasma discharge and passing a gas to be treated through the discharge so as to cause dissociative reduction of the exhaust gases and enhanced catalyst reactivity through application of the pulsed microwave fields directly to the catalyst material sufficient to cause a polarizability catastrophe and enhanced heating of the metal crystallite particles of the catalyst, and in the presence or absence of the plasma. The invention also includes a reactor for aftertreatment of exhaust gases.
Whealton; John H. (Oak Ridge, TN), Hanson; Gregory R. (Clinton, TN), Storey; John M. (Oak Ridge, TN), Raridon; Richard J. (Oak Ridge, TN), Armfield; Jeffrey S. (Ypsilanti, MI), Bigelow; Timothy S. (Knoxville, TN), Graves; Ronald L. (Knoxville, TN)
(Washington, DC)
09/ 616,872
July 14, 2000
GOVERNMENT RIGHTS The United States Government has rights in this invention pursuant the terms of Department of Energy contract number DE-AC05-96OR22464.