水分对煤层气吸附解吸的影响

煤岩实际储存环境含有水，而目前考虑水分对煤层气的吸附解吸影响的研究较少，因此开展了不同含水率下的煤层气吸附解吸实验。结果表明在压力、温度等不变的条件下，随着煤含水率的增加，吸附量减小，解吸率增大；同一温度下，煤的饱和吸附量、最终解吸率与煤含水率表现出很好的线性关系，饱和吸附量几乎不受水分影响，最终解析率随着含水率的增加而增加。通过拟合分析发现，Langmuir模型可以准确描述煤层气的吸附行为，而改进Langmuir模型适合描述解吸行为，新型改进Langmuir模型可以准确拟合解吸率数据。随着温度增加，Langmuir模型中的参数 a减小；随着含水率、温度的增加，参数b 均减小。

Effect of water content on adsorption/desorption of coalbed methane

The paper carried out the adsorption/desorption experiments under different water contents,and the results show that the adsorption capacity decreases and the desorption rate increases with the increase of the water content under the balanced pressure and temperature.At the same temperature,the saturated adsorption capacity and the final desorption rate of coal show a good linear relationship with the water content,and the saturated adsorption capacity is almost not affected by water content.By fitting analysis,it is found that the Langmuir model can accurately describe the adsorption behavior of CBM,the improved Langmuir model is suitable to describe the desorption behavior and newly improved Langmuir model can be used to accurately fit the desorption rate data.With the increase of temperature,the parameter a in Langmuir model decreases.With the increase of water content and temperature,the parameter b decreases.