skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Method and system for the combination of non-thermal plasma and metal/metal oxide doped .gamma.-alumina catalysts for diesel engine exhaust aftertreatment system

Abstract

The present disclosure pertains to a system and method for treatment of oxygen rich exhaust and more specifically to a method and system that combines non-thermal plasma with a metal doped .gamma.-alumina catalyst. Current catalyst systems for the treatment of oxygen rich exhaust are capable of achieving only approximately 7 to 12% NO.sub.x reduction as a passive system and only 25 40% reduction when a supplemental hydrocarbon reductant is injected into the exhaust stream. It has been found that treatment of an oxygen rich exhaust initially with a non-thermal plasma and followed by subsequent treatment with a metal doped .gamma.-alumina prepared by the sol gel method is capable of increasing the NO.sub.x reduction to a level of approximately 90% in the absence of SO.sub.2 and 80% in the presence of 20 ppm of SO.sub.2. Especially useful metals have been found to be indium, gallium, and tin.

Inventors:
 [1];  [2];  [3];  [2];  [3];  [3]
  1. Richland, WA
  2. West Richland, WA
  3. Peoria, IL
Issue Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
908311
Patent Number(s):
7081231
Assignee:
Caterpillar Inc. (Peoria, IL); Battelle Memorial Institute (Richland, WA)
Patent Classifications (CPCs):
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
B - PERFORMING OPERATIONS B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL B01D - SEPARATION
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Aardahl, Christopher L, Balmer-Miller, Mari Lou, Chanda, Ashok, Habeger, Craig F, Koshkarian, Kent A, and Park, Paul W. Method and system for the combination of non-thermal plasma and metal/metal oxide doped .gamma.-alumina catalysts for diesel engine exhaust aftertreatment system. United States: N. p., 2006. Web.
Aardahl, Christopher L, Balmer-Miller, Mari Lou, Chanda, Ashok, Habeger, Craig F, Koshkarian, Kent A, & Park, Paul W. Method and system for the combination of non-thermal plasma and metal/metal oxide doped .gamma.-alumina catalysts for diesel engine exhaust aftertreatment system. United States.
Aardahl, Christopher L, Balmer-Miller, Mari Lou, Chanda, Ashok, Habeger, Craig F, Koshkarian, Kent A, and Park, Paul W. Tue . "Method and system for the combination of non-thermal plasma and metal/metal oxide doped .gamma.-alumina catalysts for diesel engine exhaust aftertreatment system". United States. https://www.osti.gov/servlets/purl/908311.
@article{osti_908311,
title = {Method and system for the combination of non-thermal plasma and metal/metal oxide doped .gamma.-alumina catalysts for diesel engine exhaust aftertreatment system},
author = {Aardahl, Christopher L and Balmer-Miller, Mari Lou and Chanda, Ashok and Habeger, Craig F and Koshkarian, Kent A and Park, Paul W},
abstractNote = {The present disclosure pertains to a system and method for treatment of oxygen rich exhaust and more specifically to a method and system that combines non-thermal plasma with a metal doped .gamma.-alumina catalyst. Current catalyst systems for the treatment of oxygen rich exhaust are capable of achieving only approximately 7 to 12% NO.sub.x reduction as a passive system and only 25 40% reduction when a supplemental hydrocarbon reductant is injected into the exhaust stream. It has been found that treatment of an oxygen rich exhaust initially with a non-thermal plasma and followed by subsequent treatment with a metal doped .gamma.-alumina prepared by the sol gel method is capable of increasing the NO.sub.x reduction to a level of approximately 90% in the absence of SO.sub.2 and 80% in the presence of 20 ppm of SO.sub.2. Especially useful metals have been found to be indium, gallium, and tin.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {7}
}

Patent:

Save / Share:

Works referenced in this record:

Lean NOxCatalysis over Sn/γ-Al2O3Catalysts
journal, January 1999


Selective Reduction of Nitrogen Monoxide with Hydrocarbons over SnO 2 Catalyst
journal, May 1993


Influence of local structure on the catalytic activity of gallium oxide for the selective reduction of NO by CH4
journal, January 1996


Enhanced activity of in and Ga-supported sol-gel alumina catalysts for NO reduction by hydrocarbons in lean conditions
journal, February 1998


Alumina-supported Catalysts for the Selective Reduction of Nitric Oxide by Propene
journal, September 1993


Promotive effect of Sn on the catalytic activity of Al2O3 for the selective reduction of NO by methanol
journal, January 1994


Characterization of SnO2/Al2O3 Lean NOx Catalysts
journal, June 1999