吸附势理论在煤层夹矸型黏土矿物吸附甲烷中的应用

摘要

In this paper, the methane adsorption curves are deduced by two different methods to test under adsorbed by non-coal and coal bearing clay minerals. The relations between the adsorption capacity under different temperature and pressure were obtained by fitting calculation. The results show that the adsorption potential for the samples in order are NH4 -I> Kao-I >Ill>Phl. This result is in good agreement with the experiment results, and the method is feasible. It provides a method to predict the methane adsorption state under different temperature and pressure, and provide a basis for the exploration of gas adsorption in deep coal reservoir.%通过两种不同方法对实验条件下夹矸型及非煤型黏土矿物甲烷吸附的相关数据进行了推导,通过拟合计算分别推得各样品对应的不同温度下吸附量与压力关系式.结果表明,在吸附量相同时,吸附势大小顺序为:NH4-I>Kao-I>Ill>Phl;表明运用吸附势理论推导出的各样品甲烷吸附能力大小顺序和实测的结果一致,该方法存在一定的可行性,为预测不同埋深温压下的甲烷吸附状态提供了一种方法手段,为探索深部煤储层气体吸附提供了依据.