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Plasma Sci. Technol. ›› 2018, Vol. 20 ›› Issue (1): 14004-014004.doi: 10.1088/2058-6272/aa8f3c

• 18届全国等离子体科学和技术会议 • 上一篇    下一篇

A numerical simulation study on active species production in dense methane-air plasma discharge

Gui LI (李桂)1, Muyang QIAN (钱沐杨)1, Sanqiu LIU (刘三秋)1, Huaying CHEN (陈华英)1, Chunsheng REN (任春生)2 and Dezhen WANG (王德真)2   

  1. 1 Department of Physics, Nanchang University, Nanchang 330031, People’s Republic of China
    2 School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023,
    People’s Republic of China
  • 出版日期:2017-12-04 发布日期:2017-12-07

A numerical simulation study on active species production in dense methane-air plasma discharge

Gui LI (李桂)1, Muyang QIAN (钱沐杨)1, Sanqiu LIU (刘三秋)1, Huaying CHEN (陈华英)1, Chunsheng REN (任春生)2 and Dezhen WANG (王德真)2   

  1. 1 Department of Physics, Nanchang University, Nanchang 330031, People’s Republic of China
    2 School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023,
    People’s Republic of China
  • Online:2017-12-04 Published:2017-12-07
  • Supported by:

    This work was in part financially supported by National Natural Science Foundation of China (Grant Nos. 11465013 and 11705080), and the Natural Science Foundation of Jiangxi Province (Grant Nos. 20171ACB21019, 20161BAB201013, 20171BCD40005, and 20142BAB212008).

Abstract:

Recently, low-temperature atmospheric pressure plasmas have been proposed as a potential type of ‘reaction carrier’ for the conversion of methane into value-added chemicals. In this paper, the multi-physics field coupling software of COMSOL is used to simulate the detailed discharge characteristics of atmospheric pressure methane-air plasma. A two-dimensional axisymmetric fluid model is constructed, in which 77 plasma chemical reactions and 32 different species are taken into account. The spatial density distributions of dominant charged ions and reactive radical species, such as CH4+ , CH3+ , N2+ , O2+, H, O, CH3, and CH2, are presented, which is due to plasma chemical reactions of methane/air dissociation (or ionization) and reforming of small fragment radical species. The physicochemical mechanisms of methane dissociation and radical species recombination are also discussed and analyzed.

Key words: atmospheric pressure methane-air plasma, numerical simulation, methane dissociation, radical species recombination

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