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不同吸附模型对容量法、重量法测定页岩吸附等温曲线的拟合分析
引用本文:张帆,李相臣.不同吸附模型对容量法、重量法测定页岩吸附等温曲线的拟合分析[J].煤炭学报,2016,41(Z1):164-168.
作者姓名:张帆  李相臣
作者单位:西南石油大学 油气藏地质及开发工程国家重点实验室,四川 成都 610500
基金项目:西南石油大学“过学术关”基金资助项目;国家重点基础研究发展计划(973)资助项目(2013CB228003);国家自然科学基金石油化工联合基金重点资助项目(U1262209)
摘    要:采用容量法、重量法对随机选取的12个页岩样品在不同温度进行等温吸附测试。使用Freundlich,Langmuir,D-R,Langmuir-Freundlich,Double Langmuir,Toth等6种常用的单组分拟合模型对实验数据进行拟合,检验了实验数据的拟合程度。结果表明:综合考虑不同样品、温度、平衡压力及实验方法,拟合结果由好到差的顺序为:Langmuir-Freundlich,Double Langmuir,Toth,D-R,Freundlich,Langmuir。其中,Langmuir-Freundlich、双 Langmuir分别在平衡压力较高、较低的实验条件下拟合最为精确。

关 键 词:页岩  容量法  重量法  吸附等温曲线  吸附模型拟合  
收稿时间:2015-06-15

Analysis on model fitting of adsorption isotherms in shales tested by volumetric method and gravimetric method
Abstract:The adsorption isotherms test at different temperatures on 12 shale samples selected randomly was conducted using volumetric method and gravimetric method.Six different single-component fitting models (Freundlich,Langmuir,D-R,Langmuir-Freundlich,double Langmuir,Toth) were used to fit the experimental data,and their fitting degree was investigated.Considering different samples,temperature,equilibrium pressure and experimental methods,the results show that the fitting result order from good to badis:Langmuir-Freundlich,double Langmuir,Toth,D-R,Freundlich,and Langmuir.Among them,the Langmuir-Freundlich equation and double Langmuir equation could describe the curve most accurately under the condition of higher equilibrium pressure and lower experiment condition respectively.
Keywords:shale  volumetric method  gravimetric method  adsorption isotherms  adsorption model simulation
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