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为了准确预测低温条件下煤对甲烷的吸附等温线,选用平顶山己15-17煤层煤样,并以高低温变频实验装置为依托,对煤样进行高/低温环境(-20、-10、0、10、20℃)下的甲烷吸附试验。基于吸附势理论,利用吸附特性曲线的唯一性,根据20、10、0℃的甲烷吸附数据,预测-10、-20℃时甲烷的吸附等温线。结果表明:预测的吸附等温线与实测的吸附等温线吻合良好,平均相对误差分别为2.47%和2.64%。
In order to accurately predict coal adsorption isotherms for methane under low temperature conditions, coal samples of Pingdingshan 15-17 coal seam were selected and relied on high and low temperature frequency conversion experimental equipment. The coal samples were subjected to high / low temperature (-20, -10, , 10, 20 ° C) methane adsorption test. Based on the adsorption potential theory, based on the uniqueness of the adsorption characteristic curve, the methane adsorption isotherms at -10 and -20 ℃ are predicted based on the methane adsorption data at 20, 10 and 0 ℃. The results show that the predicted adsorption isotherms agree well with the observed adsorption isotherms with mean relative errors of 2.47% and 2.64%, respectively.