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Plasma Sci. Technol. ›› 2019, Vol. 21 ›› Issue (8): 085503.doi: 10.1088/2058-6272/ab104e

• Plasma Technology • Previous Articles     Next Articles

Experimental investigation on n-decane plasma cracking in an atmospheric-pressure argon environment

Shida XU (胥世达)1, Di JIN (金迪)1,3, Feilong SONG (宋飞龙)1 and Yun WU (吴云)1,2   

  

  1. 1 Science and Technology on Plasma Dynamics Laboratory, Air Force Engineering University, Xi’an 710038, People’s Republic of China
    2 Institute of Aeroengine, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China
    3 Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
  • Received:2018-10-20 Revised:2019-03-14 Accepted:2019-03-15 Published:2019-05-08
  • Supported by:

    This work is supported by National Natural Science Foundation of China (Nos. 91541120, 91641204).

Abstract:

In order to solve the problem of the difficulty of igniting and steadily propagating a continuous rotating detonation engine when using liquid hydrocarbon fuel, an experiment was carried out using a dielectric barrier discharge excited by a nanosecond power supply to crack n-decane, the single alternative fuel to aviation kerosene, in a pre-heated argon environment. By changing the voltages and the discharge frequencies, the concentrations of different components as well as a number of different species were acquired. The generating mechanism of olefins and alkanes together with their competition mechanism were acquired. The influence of the voltage on isomer products was also analyzed. The results demonstrate that the bond energy distribution and the species generating condition are the main factors affecting the formation of the products. With the increasing of voltage and discharge frequency, small molecule olefins, large molecular olefins, large molecular alkanes, small molecular alkanes, and hydrogen were detected, and in turn, their concentrations were also increased except for ethylene; what is more, when the voltage was increased over 8.5 kV, the n-butene converted to trans-butene, and the n-pentene converted to isoamylene.

Key words: dielectric barrier discharge, plasma cracking, n-decane, isomer