煤的等温吸附-解吸实验及其精确拟合

Isothermal adsorption and desorption experiment of coal and experimental results accuracy fitting

针对当前产业界面临的对煤层气解吸机理研究不足的现状,开展了6组煤样的甲烷气体的等温吸附/解吸实验。结果表明,煤层气的解吸过程略微滞后于吸附过程,同一煤样的等温解吸曲线与等温吸附曲线存在一个匮乏压力下的残余吸附量;通过对实验数据的分析,建立了降压条件下煤层气解吸作用的精确拟合方程。

Facing the shortage of desorption mechanism of CBM industry,executed 6 groups coal samples isothermal adsorption and desorption experiments.The results show that desorption process is delay to adsorption,it exists a lack pressure point having residual adsorption volume between isothermal desorption curve and adsorption curve.Using the analysis results of experiment,framed accuracy fitting equation of CBM desorption when pressure reducing.