关于表面能在煤吸附性评价方面应用的探讨  

Discussion on Application of Surface Energy in Evaluation of Coal Adsorption

作　　者：许小凯[1] 孟召平[1] 张玉贵[2] 陈亮[3] 丁九龙[1] 

机构地区：[1]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [2]河南理工大学安全科学与工程学院,河南焦作454000 [3]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤矿安全》2015年第5期172-175,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41172145;41372163);"十二五"国家科技重大专项资助项目(2011ZX05063)

摘　　要：煤表面能是反映煤表面特性的重要热力学参数。常用的煤表面能求取方法是吸附法。对比前人研究成果,发现用该方法计算的表面能在描述煤吸附性时存在矛盾的结论。原因总结:用基于吸附实验的表面能计算结果来描述煤吸附性在逻辑上存在循环论证问题。认为用吸附法计算的表面能不可以用来反映煤的吸附性。为了避免循环论证问题,可以尝试用其它实验实测表面能,但实现难度大,可操作性不强。所以用表面能来解释煤对甲烷的吸附特征的意义不大。引入量子化学等学科,深入研究微观煤大分子结构与甲烷分子的相互作用,才是探索煤吸附甲烷本质的必经途径。Surface energy is one of the important thermodynamic parameters reflecting the surface characteristics of coal. Adsorption method is commonly used to calculate the coal surface energy. Contradictory conclusions exist in describing coal adsorption with surface energy calculated by this method according to previous research results. There exists a circular reasoning problem logically in describing coal adsorption with surface energy calculation results based on adsorption experiments. Therefore, this method should not be used to reflect the adsorption of coal： Circular reasoning problem must be avoided to explain coal adsorption mechanism with surface energy. Other actually experimental measurement could be tried, but it is difficult to implement. There is no significance in explaining adsorption characteristics of coal to methane with surface energy. Bring into disciplines such as quantum chemistry and studying the interaction between microscopic coal macromolecular structure and methane molecular in depth are essential to explore the nature of coal methane adsorption.

关 键 词：煤 吸附 甲烷 LANGMUIR方程 表面能 循环论证 

分 类 号：TD712[矿业工程—矿井通风与安全]