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LUO Z M, LIU R W, WANG C,et al.Reaction kinetic simulation of the effect of multi-component mixed gas on CH， explosion[J].Journal of Henan Polytechnic University(Natural Science) ,2021,40(6):1-9.

多元混合气体对CH₄爆炸影响的反应动力学模拟

罗振敏1,2,3, 刘荣玮1,2, 王超1,2, .苏彬1,2

1.西安科技大学 安全科学与工程学院，陕西 西安 710054;2.陕西省煤火灾害防治重点实验室，陕西 西安 710054;3.陕西省工业过程安全与应急救援工程技术研究中心，陕西 西安 710054

摘要:为深入研究多元混合气体对CH₄爆炸的影响和作用机理，选取C₂H₆，C₂H₄，CO，H₂典型可燃气体，采用CHEMKIN软件构建零维封闭均相反应器模型，研究其对CH₄爆炸反应过程的影响，模拟分析以CO为主导的混合气体对CH₄最大爆炸压力、最大爆炸温度和爆炸过程中关键自由基（H，O，OH）的影响，同时对H+OH自由基最大体积分数变化规律进行分析，并与理论当量状态下各单一气体对CH₄爆炸过程的影响规律作对比。结果表明：混合气体的添加对CH₄最大爆炸压力和最大爆炸温度有明显促进作用；爆炸过程中H自由基最大体积分数持续 增加，O和OH自由基最大体积分数变化与CH₄体积分数有关；多元混合气体对CH₄的最大爆炸压力和最大爆炸温度影响与单一H₂或CO对其影响规律相似，对关键自由基（H，O，OH）的影响规律与CO更为接近。通过敏感性分析获得了影响CH₄爆炸过程的关键反应。

关键词:多元混合气体;CH，爆炸;数值模拟;反应动力学;敏感性分析

doi:10.16186/j.cnki.1673-9787.2020030033

基金项目:国家自然科学基金资助项目（51674193）；陕西省自然科学基础研究计划联合基金资助项目（2019JLM-9）；中国博士后科 学基金资助项目（2019M663780 ）

收稿日期:2020/03/10

修回日期:2020/07/09

出版日期: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