Effect of hydrocarbons on plasma treatment of NOx
- Lawrence Livermore National Lab., CA (United States)
Lean burn gasoline engine exhausts contain a significant amount of hydrocarbons in the form of propene. Diesel engine exhausts contain little gaseous hydrocarbon; however, they contain a significant amount of liquid-phase hydrocarbons (known as the volatile organic fraction) in the particulates. The objective of this paper is to examine the fate of NO{sub x} when an exhaust gas mixture that contains hydrocarbons is subjected to a plasma. The authors will show that the hydrocarbons promote the oxidation of NO to NO{sub 2}, but not the reduction of NO to N{sub 2}. The oxidation of NO to NO{sub 2} is strongly coupled with the hydrocarbon oxidation chemistry. This result suggests that gas-phase reactions in the plasma alone cannot lead to the chemical reduction of NO{sub x}. Any reduction of NO{sub x} to N{sub 2} can only be accomplished through heterogeneous reactions of NO{sub 2} with surfaces or particulates.
- Research Organization:
- Dept. of Energy Assistant Secretary for Energy Efficiency and Renewable Energy, Office of Transportation Technologies, Washington, DC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 334041
- Report Number(s):
- CONF-970799-PROC.; ON: DE99000798; TRN: IM9917%%5
- Resource Relation:
- Conference: 1997 diesel engine emissions reduction workshop, San Diego, CA (United States), 27-31 Jul 1997; Other Information: PBD: [1997]; Related Information: Is Part Of Proceedings of the 1997 diesel engine emissions reduction workshop; PB: 488 p.
- Country of Publication:
- United States
- Language:
- English
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