高温高压平衡水条件下煤吸附CH4实验

以北皂矿的褐煤、蔡园矿的气煤、西曲矿的焦煤和古汉山矿的无烟煤作为研究煤样，模拟深部煤层的实际温度、压力和水分含量条件，进行高温高压平衡水条件下煤吸附CH4实验.实验结果表明：褐煤的朗格缪尔体积(VL)随温度的升高而减小；焦煤的朗格缪尔体积随温度的升高而增大；气煤和无烟煤的朗格缪尔体积随温度的升高先增大，后减小。研究表明：煤层埋藏深度增加，温度增高，吸附量减小；温度增高，平衡水分含量降低；平衡水分含量降低，吸附量增大.高温高压平衡水条件下煤吸附CH4的实验结果表现的特性是由于压力、温度和水分对煤吸附的综合作用的结果.在开展深部煤层等温吸附实验研究时，应该选用与模拟深度相对应的温度下平衡水含量的煤样。

Adsorption experiments on CH_4 under the conditions of high temperature and pressure and equilibrium water

Under conditions of high temperature and pressure and with equilibrium water,the adsorption experiments on CH4 were carried out with lignite,gas coal,coking coal and anthracite.The experiment results show that the VL of lignite decreases with increasing temperature,but it is in contrast with the situation about coking coal.And the VL of gas coal and anthracite first increases and then decreases with increasing temperature.The coalbed temperature increases with the burial depth increasing,but the elevated temperature causes low adsorption and low moisture content.The adsorption increases because of the elevated moisture content.So,the characteristical results of this adsorption experiments are due to the combined effects of temperature and pressure and water content.The coal samples with equilibrium water corresponding to the simulated temperature shoud be selected to carry out adsorption experiments on deep coalbed.