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Reaction kinetic simulation of the effect of multi-component mixed gas on CHa explosion
Time: 2021-11-10 Counts:

doi:10.16186/j.cnki.1673-9787.2020030033

Received:2020/03/10

Revised:2020/07/09

Published:2021/11/15

Reaction kinetic simulation of the effect of multi-component mixed gas on CH4 explosion

LUO Zhenmin1,2,3, LIU Rongwei1,2, WANG Chao1,2, SU Bin1,2

1.School of Safety Science and Engineering， Xi’an University of Science and Technology， Xi’an 710054 ， Shaanxi， China;2.Shaanxi Key Laboratory of Prevention and Control of Coal Fire， Xi ’ an 710054 ， Shaanxi， China;3.Shaanxi Engineering Research Center for Industrial Process Safety & Emergency Rescue， Xi ’an 710054 ， Shaanxi， China

Abstract: In order to deeply study the influence of multi-component mixed gas on CH4 explosion and to analyze its mechanism，C2H6，C2H4，CO，H2 were selected as typical combustible gases，using the CHEMKIN software， a zero-dimensional closed homogeneous reactor model was built to study the four types of mixture effect of gas on CH4 explosion reaction process.The maximum explosion pressure and temperature of CO-dominated gas mixture to CH4 and the key free radicals( H，O，OH) during the explosion were simulated and analyzed.The change law of the peak content of free radical H + OH was also analyzed，and compared with the influence law of each single gas on the CH4 explosion process in the theoretical equivalent state.The results showed that: The addition of mixed gas could obviously promote the maximum explosion pressure and temperature of CH4，the maximum concentration of H radical increased continuously during the explosion，and the change of the maximum concentration of O and OH free radicals was related to the concentration of CH4 .Compared with a single gas，it was found that the influence on the maximum explosion pressure and temperature of methane was similar to that of a single gas of H2 and CO，and the influence of key free radicals( H，O，OH) was closer to that of CO.The key reactions affecting the explosion process of CH4 were obtained by sensitivity analysis.

Key words:multi-component mixed gas;CH4 explosion;numerical simulation;reaction kinetic;sensitivity analysis

 多元混合气体对CH_4爆炸影响的反应动力学模拟_罗振敏.pdf


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