构造煤甲烷吸附表面能研究-煤田地质与勘探.PDF

第42 卷 第1 期 煤田地质与勘探 Vol. 42 No.1 2014 年2 月 COAL GEOLOGY EXPLORATION Feb. 2014 文章编号: 1001-1986(2014)01-0031-04 构造煤甲烷吸附表面能研究 简 阔, 张玉贵, 赫少攀，高然超 (河南理工大学安全科学与工程学院，河南 焦作 454000) : 煤的表面能是致使煤具有吸附性差异的根本原因。通过分析动力变质作用对构造煤结构和 组分的影响，借助甲烷等温吸附实验，计算了不同温度下随着压力增大，原生结构煤和构造煤吸 附甲烷的煤表面能的变化情况，并从构造煤动力变质角度分析了其表面能变化的原因。结果表明： 动力变质作用对构造煤结构和组分改造作用明显，构造煤比共生的原生结构煤微孔隙更发育，吸 附能力更强；计算结果也表明，随着温度的升高和压力的增大，构造煤吸附甲烷的表面能降低值 均大于共生的原生结构煤，构造煤吸附甲烷的能力更强。 ：构造煤；动力变质作用；甲烷吸附表面能 ：P618.13 ：A DOI: 10.3969/j.issn.1001-1986.2014.01.007 The surface energy of methane adsorption of tectonic coal JIAN Kuo, ZHANG Yugui, HE Shaopan, GAO Ranchao (School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China) Abstract: The fundamental reason of coal adsorption difference is coal surface energy. In this paper, the effect which is from dynamic metamorphism on tectonic coal structure and components was analyzed. In the process of adsorption of methane, using methane adsorption isotherm experiments, we calculated the surface energy change of primary structure coal and tectonic coal at different temperatures, and causes of surface energy change of tectonic coal were analyzed from the perspective of dynamic metamorphism. The results show that the transformable effect which is from dynamic metamorphism on structure and components of tectonic coal is obvious, the micro pores structure of tectonic coal is more developed than symbiotic primary structure coal, and the tectonic coal has stronger adsorption capacity. The calculation results also show that, both the lower value of surface energy and ad-