煤矿安全2018，Vol.49Issue(1)：25-28,4.DOI:10.13347/j.cnki.mkaq.2018.01.007
实验室测量甲烷绝对吸附量的误差研究
Study on Measurement Error of Absolute Adsorption of Coal-bed Methane in Laboratory
摘要
Abstract
In order to study the measurement accuracy and error of absolute adsorption quantity of coal-bed methane in laboratory,a theoretical analysis and experimental methods were used.Based on the principle of determining the adsorption quantity of coalbed methane in laboratory,the adsorption capacity that measured in the laboratory is actually the excess adsorption.On the other hand,the true adsorption quantity of coal-bed methane was called the absolute adsorption quantity.The excess adsorption quantity is less than the absolute quantity.By comparing the relationship between the excess adsorption capacity and the absolute adsorption capacity and the modified adsorption isotherm model,it is found that the adsorption isotherms are separated when the pressure becomes larger and the corresponding isotherm is lower than the latter.With the increase of pressure,the methane is close to the supercritical condition,the free phase methane density is bigger,and this trend becomes more obvious.At the same time,by analyzing the error of the excess adsorption quantity and the absolute adsorption quantity,the error between the absolute adsorption quantity and the excess adsorption quantity increases with increasing adsorption equilibrium pressure.关键词
超额吸附量/绝对吸附量/误差/吸附等温线/容量法/甲烷Key words
excess adsorption quantity/absolute adsorption quantity/error/adsorption isotherm/volumetric method/methane分类
矿业与冶金引用本文复制引用
刘静波,严敏,魏宗勇,白杨,刘宝莉..实验室测量甲烷绝对吸附量的误差研究[J].煤矿安全,2018,49(1):25-28,4.基金项目
国家自然科学基金青年基金资助项目(51604220) （51604220）
中国博士后科学基金面上资助项目(2017M610643) （2017M610643）
