氢气对瓦斯爆炸化学动力学行为影响研究  

Study on the influence of hydrogen on chemical kinetic behavior of gas explosion

作　　者：王振兴 王洋 韩东洋 任晓伟 Wang Zhenxing;Wang Yang;Han Dongyang;Ren Xiaowei(SHCCIG Caojiatan Mining Corporation Ltd.,Yulin 719000,China)

机构地区：[1]陕西陕煤曹家滩矿业有限公司,陕西榆林719000

出　　处：《煤炭与化工》2022年第9期140-145,共6页Coal and Chemical Industry

摘　　要：为揭示H_(2)对瓦斯爆炸反应化学动力学行为的影响机制,在标准20 L球形爆炸容器中开展瓦斯爆炸实验,测试了物质的量比为1,H_(2)占比为0~0.5的H_(2)/CH_(4)混合气体爆炸压力。利用CHEMKIN-PRO数值模拟软件对H_(2)/CH_(4)爆炸反应参数进行了计算,结果表明:H_(2)的混入,增大了·H自由基和·OH自由基的生成速率,进而促进了38#、84#的反应;当H_(2)占比超过一定比例后,一些支链反应,如53#的逆反应被促进,CH_(4)的氧化反应如155#、156#被减弱。实验表明:H_(2)的混入,增大了瓦斯爆炸的压力,且随着H_(2)占比的增大,爆炸压力呈先增大后不变的趋势。研究成果为矿井瓦斯爆炸事故的防治提供了理论基础。In order to reveal the influence mechanism of H_(2) on the chemical kinetic behavior of gas explosion reaction,the gas explosion experiment was carried out in a standard 20 L spherical explosion container,and the explosion pressure of H_(2)/CH_(4) mixed gas with a molar ratio of 1 and a H_(2) ratio of 0~0.5 was measured.The H_(2)/CH_(4) explosion reaction parameters were calculated by using CHEMKIN-PRO numerical simulation software.The results show that the addition of H_(2) increased the formation rate of·H radical and·OH radical,and further promoted the reactions of 38# and 84#;when the proportion of H_(2) exceeds a certain proportion,some branch chain reactions,such as the reverse reaction of 53#,are promoted,and the oxidation reactions of CH_(4),such as 155# and 156#,are weakened.The experiment shows that the mixing of H_(2) increases the pressure of gas explosion,and with the increase of H_(2) proportion,the explosion pressure increases first and then remains unchanged.The research results provide a theoretical basis for the prevention and control of mine gas explosion accidents.

关 键 词：瓦斯爆炸 H_(2)/CH_(4) 化学动力学 链式反应 自由基 基元反应 

分 类 号：O643.1[理学—物理化学]