摘要
研究了晋城和潞安煤在高压下对纯 CH4,CO2 及其二元混合气体的吸附特性 ,在对混合气体绝对吸附量计算公式推导的基础上 ,对绝对吸附等温线进行了研究 .结果表明 :高压下煤对混合气体的吸附介于纯 CH4和 CO2 之间 ,Gibbs吸附等温线和绝对吸附等温线表现出较大的差异 ;煤对混合气体中 CH4和 CO2 的吸附呈现出不同的吸附特点 ;煤对 CO2 优先吸附 ,并且随着压力的升高 ,煤对 CO2 选择性吸附能力增加 .本研究结果对开展注烟道气提高煤层采收率和煤层埋藏CO2 具有一定的指导作用 .
The adsorption characteristics of pure CH 4,CO 2 and their binary mixtures on Jincheng and Lu'an coal under high pressure have been studied,and formula of absolute adsorption has been given to employ studying the absolute adsorption isotherm of real gas on coal in the paper.The studying results show:The adsorbed amount of mixed gases is between pure methane and dioxide carbon under high pressure and the Gibbs adsorption isotherms is different to that of absolute adsortion;There is different adsorption characteristics between CH 4 and CO 2;It is always preterential adsorption of CO 2,and selection of CO 2 adsorption on coal is increased with the increasing of equilbrium pressure.The studying results can used to direct investigation of CO 2 enhanced coalbed methane recovery and CO 2 sequestration in coalbed with injection flue gas.
出处
《煤炭转化》
CAS
CSCD
北大核心
2005年第1期43-47,共5页
Coal Conversion
基金
国家"十五"攻关项目 (2 0 0 1BA60 5 A-0 7-0 6)
