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用扩展Langmuir方程、理想吸附溶液理论和数值分析方法对开滦矿区不同变质程度煤对CO2/CH4二元气体的吸附量进行了预测,并用平均相对误差检验了其预测精度。结果表明:同一预测方法对开滦矿区不同变质程度煤的总吸附量预测准确度存在明显差异,理想吸附溶液理论法相对于扩展Langmuir方程法和数值分析法,其预测结果与实验值的拟合程度较好;理想吸附溶液理论对混合气体吸附预测的准确度取决于所预测的煤样煤质指标和煤样对纯气体的Langmuir等温吸附常数。在同样使用理想吸附溶液理论预测时,相对于低变质程度煤,中等变质程度煤的预测结果与实验值吻合程度更好。开滦矿区低变质程度林南仓矿11号煤预测的平均相对误差高到49.22%,所以还需对其进行混合气体的等温吸附实验,才能获得较准确的吸附特性参数.
The extended Langmuir equation, the theory of ideal adsorption solution and the numerical analysis method were used to predict the CO2 / CH4 binary gas adsorption of different metamorphic coal in Kailuan mine, and the prediction accuracy was tested by the average relative error. The results show that there is a significant difference in predicting the total adsorption amount of coal with different metamorphic grades in the Kailuan mine by the same prediction method. Compared with the extended Langmuir equation method and the numerical analysis method, the theoretical value of the ideal adsorption solution theory is better than the experimental data The accuracy of the ideal adsorption solution theory on the prediction of mixed gas adsorption depends on the predicted coal-like coal quality index and the Langmuir isotherm adsorption constant of the pure gas on the coal sample. In the same theoretical prediction of ideal adsorption solution, the predictions of coal with moderate metamorphism are in good agreement with the experimental ones in comparison with the coal with low metamorphism. The average relative error of No. 11 coal in Linnan Mine with low metamorphism degree in Kailuan Mine is as high as 49.22%, so isothermal adsorption experiment of mixed gas is needed to obtain more accurate adsorption characteristic parameters.