Acta Phys. -Chim. Sin. ›› 2016, Vol. 32 ›› Issue (6): 1416-1423.doi: 10.3866/PKU.WHXB2016032501

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Ethylene Oxidation Experimental Study and Kinetic Mechanism Analysis Based on Shock Tube

Xiao-He XIONG1,Yan-Jun DING1,Xiao-Bo CAO2,Zhi-Min PENG1,*(),Yong-Hua LI2   

  1. 1 Department of Thermal Engineering, State Key Laboratory of Power Systems, Tsinghua University, Beijing 100084, P. R. China
    2 School of Energy and Power Engineering, North China Electric Power University, Baoding 071003, Hebei Province, P. R. China
  • Received:2015-12-21 Published:2016-06-03
  • Contact: Zhi-Min PENG,
  • Supported by:
    The project was supported by the National Natural Science Foundation of China(国家自然科学基金)


This study measures the ignition delay times of C2H4/O2/Ar stoichiometric mixtures under Ar diluent mole fractions of 75% and 96% using the shock tube. The experimental temperatures range from 1092 to 1743 K and the pressures range from 1.3 to 3.0 atm (1 atm = 101325 Pa). The logarithm of the ignition delay time is found to be a linear function of the reciprocal temperature. The ignition delay time is shorter in the lower diluent concentrations, as well as decreasing with increasing temperature. Moreover, detonation (or deflagration to detonation) is observed in the lower but not the higher diluent concentrations. In comparative simulations of four different mechanisms, the LLNL mechanism best fits the experimental results. Reaction path analysis shows that the ethylene oxidation paths are affected by temperature rather than diluent rate. With increasing temperature, the number of ethylene oxidation paths decrease from four to three because of the predominance of the reverse reaction C2H4 + H (+ M) → C2H5 (+ M).

Key words: Shock tube, Ethylene, Ignition delay, Deflagration, Detonation, Oxidation


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