地质领域常以等温吸附试验为研究方法，探究煤中气体之间的吸附行为。以刘庄矿13煤为研究对象，开展了N₂、CO₂气体吸附实验，在综合分析拟合回归系数平方R²、模型计算值与实验值的残差平方和v与相对误差s的基础上，选出低渗煤中气体吸附的最佳吸附模型。结果表明：对于低渗煤中N₂吸附的模型拟合精度由高到低为：优化L模型>优化D-A模型>优化D-R模型>D-A模型>L模型>D-R模型>F模型；对于低渗煤中CO₂吸附的模型拟合精度由高到低为：优化L模型>优化D-A模型=优化D-R模型>D-A模型>L模型>D-R模型>F模型。实验结果可作为低渗煤层中气体吸附及CO₂封存提供地质依据。

Isothermal adsorption experiments are widely used in the field of geology as a research method to investigate the adsorption behavior between gases in coal seams. Taking the coal reservoirs of No. 13 Coal from Liuzhuang Mine as the research object, N₂ and CO₂ gas adsorption experiments were carried, and the optimal adsorption model for gas adsorption in low permeability coal was selected on the basis of a comprehensive analysis of the squared regression coefficients of the fit R², the residual sum of squares of the calculated and experimental values of the model v, and the relative errors s. The results show that the models fitting degree of N₂ adsorption in low permeability coal from high to low: optimized L model > optimized D-A model > optimized D-R model> D-A model > L model > D-R model > F model. The models fitting degree of CO₂ adsorption in low permeability coal from high to low: optimized L model > optimized D-A model = optimized D-R model > D-A model > L model > D-R model > F model. The experimental results can provide geological basis for gas adsorption and CO₂ sequestration in low-permeability coal seams.