Wang Hua, Gu Sai, Chen Tao
School of Information Science and Engineering, Qufu Normal University, Rizhao 276826, China.
School of Engineering, University of Warwick, Coventry CV4 7AL, U.K.
ACS Omega. 2020 Sep 16;5(38):24684-24692. doi: 10.1021/acsomega.0c03280. eCollection 2020 Sep 29.
Gas explosions are destructive disasters in coal mines. Coal mine gas is a multi-component gas mixture, with methane (CH) being the dominant constituent. Understanding the process and mechanism of mine gas explosions is of critical importance to the safety of mining operations. In this work, three flammable gases (CO, CH, and H) which are commonly present in coal mines were selected to explore how they affect a methane explosion. The explosion characteristics of the flammable gases were investigated in a 20 L spherical closed vessel. Experiments on binary- (CH/CO, CH/CH, and CH/H) and multicomponent (CH/CO/CH/H) mixtures indicated that the explosion of such mixtures is more dangerous and destructive than that of methane alone in air, as measured by the explosion pressure. Furthermore, a self-promoting microcirculation reaction network is proposed to help analyze the chemical reactions involved in the multicomponent (CH/CO/CH/H) gas explosion. This work will contribute to a better understanding of the explosion mechanism of gas mixtures in coal mines and provide a useful reference for determining the safety limits in practice.
瓦斯爆炸是煤矿中的毁灭性灾害。煤矿瓦斯是一种多组分气体混合物，其中甲烷（CH₄）是主要成分。了解矿井瓦斯爆炸的过程和机理对采矿作业安全至关重要。在这项工作中，选取了煤矿中常见的三种可燃气体（CO、CH₄和H₂）来探究它们如何影响甲烷爆炸。在一个20升的球形密闭容器中研究了可燃气体的爆炸特性。对二元混合物（CH₄/CO、CH₄/C₂H₄和CH₄/H₂）和多组分混合物（CH₄/CO/C₂H₄/H₂）的实验表明，通过爆炸压力衡量，此类混合物的爆炸比空气中单纯甲烷的爆炸更危险、破坏性更强。此外，还提出了一个自促进微循环反应网络，以帮助分析多组分（CH₄/CO/C₂H₄/H₂）气体爆炸所涉及的化学反应。这项工作将有助于更好地理解煤矿中气体混合物的爆炸机理，并为确定实际中的安全限值提供有用的参考。
