Fate of SO{sub 2} During Plasma Treatment of Diesel Engine Exhaust
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}.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE Office of Defense Programs (DP) (US)
- DOE Contract Number:
- W-7405-Eng-48
- OSTI ID:
- 790353
- Report Number(s):
- UCRL-JC-136269; TRN: US200206%%77
- Resource Relation:
- Conference: 1999 Diesel Engine Emissions Reduction Workshop, Castine, ME (US), 07/05/1999--07/08/1999; Other Information: PBD: 25 Oct 1999
- Country of Publication:
- United States
- Language:
- English
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