文献类型：期刊文献

英文题名：Desorption hysteresis of CO2 and CH4 in different coals with cyclic desorption experiments

作者：Zhou, Yinbo[1,2];Zhang, Ruilin[1];Wang, Jia[3];Huang, Jilei[4];Li, Xinran[1];Wu, Jingang[1]

第一作者：Zhou, Yinbo

通讯作者：Zhou, YB[1];Zhou, YB[2]

机构：[1]Henan Univ Engn, Sch Safety Engn, Zhengzhou 451191, Peoples R China;[2]Henan Polytech Univ, State Key Lab Cultivat Base Gas Geol & Gas Contro, Jiaozuo 454150, Henan, Peoples R China;[3]Luoyang Normal Univ, Coll Phys & Elect Informat, Luoyang 471934, Peoples R China;[4]Henan Univ Econ & Law, Coll Resources & Environm, Zhengzhou 450046, Peoples R China

第一机构：Henan Univ Engn, Sch Safety Engn, Zhengzhou 451191, Peoples R China

通讯机构：[1]corresponding author), Henan Univ Engn, Sch Safety Engn, Zhengzhou 451191, Peoples R China;[2]corresponding author), Henan Polytech Univ, State Key Lab Cultivat Base Gas Geol & Gas Contro, Jiaozuo 454150, Henan, Peoples R China.

年份：2020

卷号：40

外文期刊名：JOURNAL OF CO2 UTILIZATION

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000561854900001)】；

基金：The authors are grateful to the National Natural Science Foundation of China (No. 51804098) and the Key Scientific Research Projects in Colleges and Universities of Henan (No. 19A440001, No. 20A440003). Supported by the State Key Laboratory Cultivation Base for Gas Geology and Gas Control (Henan Polytechnic University), (No. WS2019B07).

语种：英文

外文关键词：Gas desorption; Adsorption theory; Coalbed methane; CO2 sequestration; Desorption hysteresis

摘要：The gas adsorption/desorption experiments in coal are important contents in the research of coalbed methane (CBM) recovery and CO2 sequestration. However, the curve of gas desorption often lags behind the adsorption curve, which is called desorption hysteresis. Desorption hysteresis is a common phenomenon that has a significant impact on the prediction of CBM recovery. In this paper, the characteristics of CH4 and CO2 desorption were examined using an experimental apparatus. The parameters of the Langmuir model were obtained from the desorption data. It can be concluded that the desorption isotherm of an initial pressure chosen according to the in situ coal seam pressure is more appropriate for the prediction of CBM recovery. The ratio of desorption hysteresis for CO2 is weaker than that for CH4 in different ranks coal. The desorption hysteresis is more likely to happen in low rank coal. The results of pore structure show that the average pore width of coal sample after CO2 cyclic desorption experiments is changed. The pore deformation is not the primary factor that causes desorption hysteresis, and the solution phase of gas could be another factor. The findings of this study can help for better understanding of the process of CBM recovery, the production of CBM and the CO2 storage in coal seams.