煤层气水合化的基础研究

Basic research on hydration of coal bed methane

自行设计制造了一套可用于煤层气水合物生成与分解的可视化实验系统,利用该实验系统研究了阴离子表面活性剂、非离子表面活性剂和多孔介质煤对煤层气水合物生成的影响,进行了煤层气水合物生成相平衡参数和分解热力学方面的研究。结果表明:表面活性剂的加入促进了水合物的生长,但水合物的生成情况与表面活性剂的种类和浓度有关;表面活性剂的加入有效地改变了水合物生成的热力学条件;水合物分解过程所需热量较多,证实了利用煤层气水合化技术预防煤矿煤与瓦斯突出以及进行煤层气固化储运的可行性。

Some basic researches on the hydration of coal bed methane, including visible experimental installation, the effects of surfactants and porous medium-coal on coal bed methane hydrate formation process, dissociation thermodynamics of coal bed methane hydrate were introduced. The results show that the hydrate formation is promoted by the surfactant added; the type and concentration of surfactant solution influence the formation of hydrate; and the comparison of experiment data with calculated value of the phase equilibrium theory in the same condition indicates that the thermodynamic conditions are changed evidently when the surfactant is added, the decomposition heat of coal bed methane hydrate is large, and it is possible to prevent coal and gas outburst, and to store and transport coal bed methane by using gas hydration.