吸附势理论在甲烷临界温度以上吸附中的应用

使用吸附势理论对甲烷临界温度以上在微孔活性炭上的吸附平衡进行了研究。针对吸附势理论描述气体临界温度以上吸附所面临的问题,深入考察了各种计算吸附相密度和虚拟饱和蒸汽压的方法对吸附平衡预测结果的影响。研究表明,吸附势理论可以在较宽的范围内描述甲烷临界温度以上的吸附平衡,模型预测结果受吸附相密度计算方法的影响较小,但对于虚拟饱和蒸汽压的计算方法较敏感,其中Reich等采用的经验式更为准确。

Study on Methane Adsorption above Critical Temperature by Adsorption Potential Theory

The methane adsorption equilibria on K02 microporous activated carbon above the critical temperature were studied by the adsorption potential theory The methods on calculating the adsorbate density and the pseudo-saturated pressure were investigated in detail, and the prediction results of methane adsorption by the adsorption potential theory were analyzed quantitatively It is shown that the adsorption potential theory could simulate the experimental adsorption equilibrium data reasonably Also the evaluating approaches for the adsorbate density have little effect on the prediction accuracy, but the methods for the pseudo-saturated pressure will change the prediction results greatly The suggestion of Reich et al to calculate the pseudo saturated pressure is more accurate