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

Abstract

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.

Inventors:
 [1];  [2];  [1];  [1];  [3];  [4];  [4]
  1. Oak Ridge, TN
  2. Clinton, TN
  3. Ypsilanti, MI
  4. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
874599
Patent Number(s):
6422002
Assignee:
The United States of America as represented by the United States Department (Washington, DC)
Patent Classifications (CPCs):
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01J - CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; generating; highly; reactive; plasma; exhaust; gas; aftertreatment; enhanced; catalyst; reactivity; non-thermal; gases; comprising; steps; providing; risetime; frequency; power; bursts; low-duty; factor; microwaves; sufficient; generate; discharge; passing; treated; dissociative; reduction; application; pulsed; microwave; fields; directly; material; polarizability; catastrophe; heating; metal; crystallite; particles; presence; absence; reactor; plasma discharge; non-thermal plasma; enhanced catalyst; reactive plasma; /60/204/422/

Citation Formats

Whealton, John H, Hanson, Gregory R, Storey, John M, Raridon, Richard J, Armfield, Jeffrey S, Bigelow, Timothy S, and Graves, Ronald L. Method for generating a highly reactive plasma for exhaust gas aftertreatment and enhanced catalyst reactivity. United States: N. p., 2002. Web.
Whealton, John H, Hanson, Gregory R, Storey, John M, Raridon, Richard J, Armfield, Jeffrey S, Bigelow, Timothy S, & Graves, Ronald L. Method for generating a highly reactive plasma for exhaust gas aftertreatment and enhanced catalyst reactivity. United States.
Whealton, John H, Hanson, Gregory R, Storey, John M, Raridon, Richard J, Armfield, Jeffrey S, Bigelow, Timothy S, and Graves, Ronald L. Tue . "Method for generating a highly reactive plasma for exhaust gas aftertreatment and enhanced catalyst reactivity". United States. https://www.osti.gov/servlets/purl/874599.
@article{osti_874599,
title = {Method for generating a highly reactive plasma for exhaust gas aftertreatment and enhanced catalyst reactivity},
author = {Whealton, John H and Hanson, Gregory R and Storey, John M and Raridon, Richard J and Armfield, Jeffrey S and Bigelow, Timothy S and Graves, Ronald L},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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Works referenced in this record:

Comparison of electrical discharge techniques for nonthermal plasma processing of NO in N/sub 2/
journal, January 1995


Non-Thermal Plasma Exhaust Aftertreatment: A Fast Rise-Time Concept
conference, May 1997

  • Whealton, J. H.; Hansen, G. R.; Storey, J. M.
  • International Spring Fuels & Lubricants Meeting & Exposition, SAE Technical Paper Series
  • https://doi.org/10.4271/971718