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以贵州官仓煤矿C4煤层为煤样,进行30、40、50℃下的吸附实验,并采用吸附势理论和吸附热理论对40℃和50℃煤的等温吸附曲线进行预测,对比得出预测精度较高者。研究结果表明,吸附势理论和吸附热理论在预测等温吸附曲线时都具有较高的预测精度,前者的预测精度比后者的高,前者的误差分布优于后者的;随着预测压力的增大,吸附势理论预测的相对误差逐渐减小,吸附热理论预测的相对误差先减小后增大呈“U”型,并在4.5 MPa左右达到最小。
Taking the coal seam C4 of Guantang Coal Mine in Guizhou as a sample, the adsorption experiments at 30, 40 and 50 ℃ were carried out. The isothermal adsorption curves of coal at 40 ℃ and 50 ℃ were predicted by the adsorption potential theory and adsorption heat theory. High precision. The results show that both the adsorption potential theory and the adsorption heat theory have a higher prediction accuracy when predicting the isotherm adsorption curve, the former has higher prediction accuracy than the latter, and the error distribution of the former is better than the latter. With the predicted pressure The relative error predicted by the adsorption potential theory decreases gradually. The relative error predicted by the heat of adsorption theory first decreases and then increases to a “U” shape, and reaches the minimum at 4.5 MPa.