Plasma Chemistry and Plasma Processing

, Volume 25, Issue 4, pp 371–386 | Cite as

Conversion of NO in NO/N2, NO/O2/N2, NO/C2H4/N2 and NO/C2H4/O2/N2 Systems by Dielectric Barrier Discharge Plasmas

  • Ai-Min Zhu
  • Qi Sun
  • Jin-Hai Niu
  • Yong Xu
  • Zhi-Min Song
Article
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Revised:

Abstract

An experimental study on the conversion of NO in the NO/N2, NO/O2/N2, NO/C2H4/N2 and NO/C2H4/O2/N2 systems has been carried out using dielectric barrier discharge (DBD) plasmas at atmospheric pressure. In the NO/N2 system, NO decomposition to N2 and O2 is the dominating reaction; NO conversion to NO2 is less significant. O2 produced from NO decomposition was detected by an on-line mass spectrometer. With the increase of NO initial concentration, the concentration of O2 produced decreases at 298 K, but slightly increases at 523 K. In the NO/O2/N2 system, NO is mainly oxidized to NO2, but NO conversion becomes very low at 523 K and over 1.6% of O2. In the NO/C2H4/N2 system, NO is reduced to N2 with about the same NO conversion as that in the NO/N2 system but without NO2 formation. In the NO/C2H4/O2/N2 system, the oxidation of NO to NO2 is dramatically promoted. At 523 K, with the increase of the energy density, NO conversion increases rapidly first, and then almost stabilizes at 93–91% of NO conversion with 61–55% of NO2 selectivity in the energy density range of 317–550 J L−1. It finally decreases gradually at high energy density. A negligible amount of N2O is formed in the above four systems. Of the four systems studied, NO conversion and NO2 selectivity of the NO/C2H4/O2/N2 system are the highest, and NO/O2/C2H4/N2 system has the lowest electrical energy consumption per NO molecule converted.

Keywords

NO conversion dielectric barrier discharge plasma NO2 C2H4 
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Copyright information

© Springer Science+Business Media, Inc. 2005

Authors and Affiliations

  • Ai-Min Zhu
    • 1
    • 2
  • Qi Sun
    • 1
  • Jin-Hai Niu
    • 1
  • Yong Xu
    • 1
    • 2
  • Zhi-Min Song
    • 1
  1. 1.Laboratory of Plasma Physical ChemistryDalian University of TechnologyDalianChina
  2. 2.State Key Laboratory of Material Modification by Ion, Electron and Laser BeamsDalian University of TechnologyDalianChina

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