煤田地质与勘探2016，Vol.44Issue(5)：80-85,6.DOI:10.3969/j.issn.1001-1986.2016.05.015
高、低阶煤润湿性对甲烷吸附/解吸的影响
Influence of high and low rank coal wettability and methane adsorption/desorption characteristics
摘要
Abstract
In order to study the influence of different ranks of coal wettability on the adsorption/desorption of coalbed methane(CBM), Sihe No.3 coal and Dafosi No.4coal samples were collected, which were used to perform the contact angle measurements and adsorption/desorption experiments, and analyzed the thermal characteristics of the isosteric adsorption heat through thermodynamic calculation. The results show that the water-wettability of Dafosi No.4 coal is far better than Sihe No.3 coal resulting from Dafosi No.4 coal is low metamorphic (CY) coal and the number of oxy-gen containing functional groups such as carboxyl group, hydroxyl group and so on. Meanwhile, Dafosi No. four coal has the hydrophilic property of the material component and the advantage of the development of the pore and crack. The coal moisture content is influenced by the wettability of coal, and which indirectly influences the adsorp-tion/desorption characteristics of CBM. The relationships among wettability, moisture content, desorption rate and recovery efficiency from Dafosi No. 4 coal and Sihe No.3 coal is complicated, which is restricted by the critical water content and there is a critical point of temperature. By comparing the isosteric adsorption heat, found that the hydro-philic property of coal is not conducive to the adsorption of CBM. CBM adsorption heat release is much less than de-sorption heat absorption, there is the significant desorption hysteresis, and it decreased with increasing adsorp-tion/desorption capacity and low rank coal’s weakening trend gets more obvious.关键词
寺河3号煤/大佛寺4号煤/润湿性/吸附/解吸/等量吸附热Key words
Sihe No.4 coal/Dafosi No.3 coal/wettability of coal/adsorption and desorption/isosteric adsorption heat分类
矿业与冶金引用本文复制引用
李沛,马东民,张辉,李卫波,杨甫..高、低阶煤润湿性对甲烷吸附/解吸的影响[J].煤田地质与勘探,2016,44(5):80-85,6.基金项目
山西省煤层气联合研究基金项目(2013012009)；陕西省科学技术研究发展计划（2016GY-187）@@@@Joint Research Fund of Coalbed Methane of Shanxi Provice(2013012009)；Science and Technology Research and Development Program of Shaanxi Province(2016GY-187) （2013012009）
