煤田地质与勘探Issue(3)：45-50,6.DOI:10.3969/j.issn.1001-1986.2015.03.009
页岩中气体的超临界等温吸附研究
Super-critical isothermal adsorption of gas in shale
摘要
Abstract
Shale gas isothermal adsorption experiments are mostly experiments above the critical temperature, the adsorption quantity obtained from the experiments is excess adsorption. In order to study super-critical iso-thermal adsorption mechanism of the shale gas, the weighting method was used in this study, the high pressure isothermal adsorption experiment have been made for methane and carbon dioxide in shale above the critical tem-perature. Based on the analysis of the typical adsorption and super-critical adsorption difference, through modified super-critical isothermal adsorption model (Langmuir equation and pore filling (Dubinin Radushkevich D-R)), ex-perimental data were fitted . Study indicates that the simple Langmuir equation can approximately fit experimental data of methane adsorption, but the accuracy is not high, and can't fit carbon adsorption data. When the density of the adsorbed phase as parameter can be optimized, the modified microporous packing model and the Langmuir model can fit well adsorption data of methane and carbon dioxide, Fitting effect is the best with the modified mi-croporous packing model, the adsorption phase density of super-critical methane is consistent with literature reports, suggesting that adsorbed gas may exists in the form of pore filling.关键词
过剩吸附量/超临界吸附/Langmuir方程/Dubinin Radushkevich方程Key words
excess adsorption/super-critical adsorption/Langmuir equation/Dubinin Radushkevich (D-R) equation分类
天文与地球科学引用本文复制引用
刘圣鑫,刘晓光,钟建华,马寅生,尹成明,刘成林,李宗星,李勇,刘选,毛毳..页岩中气体的超临界等温吸附研究[J].煤田地质与勘探,2015,(3):45-50,6.基金项目
国土资源大调查综合研究类项目(12120113040000-3) （12120113040000-3）
