Component fractionation of temporal evolution in adsorption-desorption for binary gas mixtures on coals from Haishiwan Coal Mine

查看全文 作　　者：Wang [1,2]Liguo;Cheng [1,2]Yuanping;Li [1,2,3]Wei;Lu [1,2]Shouqing;Xu [1,2]Chao

机构地区：[1]National Engineering Research Center for Coal & Gas Control;[2]School of Safety Engineering, China University of Mining & Technology;[3]Key Laboratory of Coal-Based CO2 Capture and Geological Storage

出　　处：《International Journal of Mining Science and Technology》索引2013年第23卷第2期,共5页

基　　金：financially supported by the Natural Science Foundation for the Youth of China (No. 41202118);the Fundamental Research Funds for the Central Universities (No.2012QNB03) 摘　　要：Adsorption-desorption experiments on CO2-CH4 gas mixtures with varying compositions have been conducted to study the fractionation characteristics of CO2-CH4 on Haishiwan coal samples. These were carried out at constant temperature but different equilibrium pressure conditions. Based on these experimental results, the temporal evolution of component fractionation in the field was investigated. The results show that the CO2 concentration in the adsorbed phase is always greater than that in the original gas mixture during the desorption process, while CH4 shows the opposite characteristics. This has confirmed that CO2 , with a greater adsorption ability has a predominant position in the competition with CH4 under different pressures. Where gas drainage is employed, the ratio of CO2 to CH4 varies with time and space in floor roadways used for gas drainage, and in the ventilation air in Nos.1 and 2 coal seams, which is consistent with laboratory results. 关键词：Binary-component gas Adsorption–desorption Component fractionation Temporal evolution

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Component fractionation of temporal evolution in adsorption-desorption for binary gas mixtures on coals from Haishiwan Coal Mine

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