粒径大小对煤吸附甲烷的影响  

The effect of particle size on adsorption of methane on coal

作　　者：张天军[1] 许鸿杰[1] 李树刚[2] 任树鑫[1] 

机构地区：[1]西安科技大学理学院,陕西西安710054 [2]西安科技大学能源学院,陕西西安710054

出　　处：《湖南科技大学学报（自然科学版）》2009年第1期9-12,共4页Journal of Hunan University of Science And Technology：Natural Science Edition

基　　金：国家自然科学基金项目(50574072);国家自然科学基金重点项目(50534049);陕西省教育厅专项科研基金(08JK366)

摘　　要：为了研究煤的粒径大小对吸附性能的影响,采集几种高瓦斯矿井的煤样,分别制成了粒径大小范围为0.15～0.20mm、0.12～0.15mm、0.109～0.12mm、0.096～0.109mm、0.045～0.096mm的5种试样;在等温度条件下,采用WY-98B吸附常数测定仪对试样进行了吸附甲烷的实验,总结出了不同粒径煤吸附甲烷的规律.在Langmuir吸附理论和分子运动理论的基础上,推导出煤的吸附能、吸附位、比表面积及吸附量之间的关系式;根据这些关系式以及分子结构特征等理论,对规律进行理论验证.验证后的吸附规律可以用来研究煤层中瓦斯运移和聚集规律以及煤与瓦斯突出的机理.图3,表1,参8.In order to research the effect of particle size on adsorption properties of coal, coal samples rich in gases are collected and five types of coal specimens are made. The grain diameters of these specimens are within the ranges of 0.15-0.20 mm, 0.12-0.15 mm, 0.109-0.12 mm, 0.096-0.109 mm, and 0.045-0.096 mm, respectively. Under isothermal conditions, adsorption-of methane-on-coal tests are done for these specimens using the WY-98B adsorption constant determinator, and the law of how coals of different particle sizes adsorb methane was found. Based on the Langmuir adsorption theory and the molecular kinetic theory, relationships among coal＇s adsorption energy, adsorption ~ site, specific surface area, and quantity adsorbed are derived. The adsorption law is theoretically verified using these relationships and the theory of molecular structure characteristics. The verified adsorption law could be used to study the law of gas migration and gathering in coal seams, and the mechanism of coal and gas outbursts.

关 键 词：朗格缪尔方程 吸附位 吸附能 

分 类 号：TD712[矿业工程—矿井通风与安全]