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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14020-014020.doi: 10.1088/2058-6272/aa861c

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

High-efficiency removal of NOx using dielectric barrier discharge nonthermal plasma with water as an outer electrode

Dan ZHAO (赵丹)1, Feng YU (于锋)1,2,3,4, Amin ZHOU (周阿敏)1, Cunhua MA (马存花)1 and Bin DAI (代斌)1,4   

  1. 1 Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, People’s Republic of China
    2 Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Production and Construction Corps, People’s Republic of China
    3 Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang UygurAutonomous Region, People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

High-efficiency removal of NOx using dielectric barrier discharge nonthermal plasma with water as an outer electrode

Dan ZHAO (赵丹)1, Feng YU (于锋)1,2,3,4, Amin ZHOU (周阿敏)1, Cunhua MA (马存花)1 and Bin DAI (代斌)1,4   

  1. 1 Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, People’s Republic of China
    2 Engineering Research Center of Materials-Oriented Chemical Engineering of Xinjiang Production and Construction Corps, People’s Republic of China
    3 Key Laboratory of Materials-Oriented Chemical Engineering of Xinjiang UygurAutonomous Region, People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07
  • Supported by:

    This work was supported by the National High Technology Research and Development Program of China (863 program; Grant No. 2015AA03A401), Program for Changjiang Scholars and Innovative Research Team in University (Grant No. IRT_15R46), and the Program of Science and Technology Innovation Team in Bingtuan (Grant No. 2015BD003).

Abstract:

With the rapid increase in the number of cars and the development of industry, nitrogen oxide (NOx) emissions have become a serious and pressing problem. This work reports on the development of a water-cooled dielectric barrier discharge reactor for gaseous NOx removal at low temperature. The characteristics of the reactor are evaluated with and without packing of the reaction tube with 2 mm diameter dielectric beads composed of glass, ZnO, MnO2, ZrO2, or Fe2O3. It is found that the use of a water-cooled tube reduces the temperature, which stabilizes the reaction, and provides a much greater NO conversion efficiency (28.8%) than that obtained
using quartz tube (14.1%) at a frequency of 8 kHz with an input voltage of 6.8 kV. Furthermore, under equivalent conditions, packing the reactor tube with glass beads greatly increases the NO conversion efficiency to 95.85%. This is because the dielectric beads alter the distribution of the electric field due to the influence of polarization at the glass bead surfaces, which ultimately enhances the plasma discharge intensity. The presence of the dielectric beads increases the gas residence time within the reactor. Experimental verification and a theoretical basis are provided for the industrial application of the proposed plasma NO removal process employing dielectric
bead packing.

Key words: NOx, dielectric barrier discharge, glass beads, nonthermal plasma

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