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《Chinese Journal of Underground Space and Engineering》 2014-05
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Analysis on Applicability of Different Adsorption Model Based on the Molecular Inter-Atomic Forces

Li Yuanxing;Wu Shiyue;Li Changlong;Zhang Meihong;Mining Engineering Institute,Taiyuan University of Technology;  
Aiming at the problem of applicability of adsorption model to different stages anthracite coal sample,Cheng Zhuang coal adsorption test data were fitted on SPSS18. 0 platform. Based on the molecular inter-atomic forces,commparative study from the microscopic Langmuir Freundlich-6 model adaptability etc. The results showed that:(1)the study based on molecular inter-atomic forces adsorption on applicability for coal sample is reliable and effective;(2)three-parameter model fitting effect was superior to the two-parameter model;(3)using Freundlich adsorption model to fit the stage of anthracite was not appropriate,and using the D-A model gave the best result;(4)according to the estimation of the supercritical state saturation vapor pressure to calculate the saturated adsorption amount would give larger data,showing that the calculation formula of the saturation vapor pressure had defects;(5)The problems of the applicability of different adsorption model to other coal rank coal sample adsorption needed further study. The results can provide theoretical reference for analysis and prediction of CBM Wells reserves.
【Fund】: 国家自然科学基金资助项目(51174141 51004075);; 山西省高等学校科技创新项目(2013112);; 太原理工大学引进人才基金(tyut-rc201308a)
【CateGory Index】: O647.3;TD712
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