为定量研究多组分系统在多孔介质内传质过程中组分之间的交互作用现象,本文基于Maxwell-Stefan模型对CH_4/Ar/H_2混合气体在单个直孔道内的纯扩散过程和C_2H_6/C_3H_8/N_2混合气体在活性炭上的吸附扩散过程进行了模拟,定量地描述和分析了多组分系统中组分之间在传质过程中的交互作用。研究表明：对于扩散过程,组分之间的交互作用表现为大分子对小分子的拖带;对于吸附过程,这种作用表现为强吸附质能够替代已被吸附在吸附剂表面的弱吸附质;主体扩散为主要的传质形式。
To quantitatively study the interaction between each species of multi-component system during mass transfer in porous media,the Maxwell-Stefan model is used to simulate the pure diffusion process of CH_4/Ar/H_2mixture gas in a single straight channel and the absorption process of C_2H_6/C_3H_8/N_2 mixture gas in the active carbon.The interaction between each species is described and analyzed quantitatively.The results show that：for diffusion process,the interaction among species is caused by dragging effect of heavy species on light one;for absorption process,the interaction arises from the displacement of weak adsorbate by strong one;and the mass transfer process is dominated by bulk diffusion.
参考文献
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| [2] | Do HD.;Do DD. .Maxwell-Stefan analysis of multicomponent transient diffusion in a capillary and adsorption of hydrocarbons in activated carbon particle[J].Chemical Engineering Science,1998(6):1239-1252. |
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