Fate of SO{sub 2} During Plasma Treatment of Diesel Engine Exhaust

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Several catalytic aftertreatment technologies rely on the conversion of NO to NO{sub 2} to achieve efficient reduction of NO{sub x} and particulates in diesel engine exhaust. These technologies require low sulfur fuel because the catalyst component that is active in converting NO to NO{sub 2} is also active in converting SO{sub 2} to SO{sub 3}. A non-thermal plasma can be used for the selective partial oxidation of NO to NO{sub 2} in the gas-phase under diesel engine exhaust conditions. This paper discusses how a non-thermal plasma can efficiently oxidize NO to NO{sub 2} without oxidizing SO{sub 2} to SO{sub 3}. ... continued below

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100 Kilobytes pages

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Brusasco, R.M.; Merritt, B.T. & Vogtlin, G.E. October 25, 1999.

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Several catalytic aftertreatment technologies rely on the conversion of NO to NO{sub 2} to achieve efficient reduction of NO{sub x} and particulates in diesel engine exhaust. These technologies require low sulfur fuel because the catalyst component that is active in converting NO to NO{sub 2} is also active in converting SO{sub 2} to SO{sub 3}. A non-thermal plasma can be used for the selective partial oxidation of NO to NO{sub 2} in the gas-phase under diesel engine exhaust conditions. This paper discusses how a non-thermal plasma can efficiently oxidize NO to NO{sub 2} without oxidizing SO{sub 2} to SO{sub 3}. It is shown that the presence of hydrocarbons in the plasma is essential for enhancing the selective partial oxidation of NO and suppressing the oxidation of SO{sub 2}.

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100 Kilobytes pages

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  • 1999 Diesel Engine Emissions Reduction Workshop, Castine, ME (US), 07/05/1999--07/08/1999

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  • Report No.: UCRL-JC-136269
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 790353
  • Archival Resource Key: ark:/67531/metadc719314

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  • October 25, 1999

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  • Sept. 29, 2015, 5:31 a.m.

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  • May 6, 2016, 2:28 p.m.

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Brusasco, R.M.; Merritt, B.T. & Vogtlin, G.E. Fate of SO{sub 2} During Plasma Treatment of Diesel Engine Exhaust, article, October 25, 1999; California. (digital.library.unt.edu/ark:/67531/metadc719314/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.