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Citation: XIONG Xiao-He, DING Yan-Jun, CAO Xiao-Bo, PENG Zhi-Min, LI Yong-Hua. Ethylene Oxidation Experimental Study and Kinetic Mechanism Analysis Based on Shock Tube[J]. Acta Physico-Chimica Sinica, ;2016, 32(6): 1416-1423. doi: 10.3866/PKU.WHXB2016032501 shu

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

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 Date: 21 December 2015
Revised Date: 25 March 2016

Fund Project: The project was supported by the National Natural Science Foundation of China (51206086).

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).
- Shock tube,
- Ethylene,
- Ignition delay,
- Deflagration,
- Detonation,
- Oxidation
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