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The measurements of the intrinsic diffusivity in pores and surface diffusivity inside the porous materials in liquid phase

机译：在液相中的多孔材料内部的孔隙和表面扩散率中的内在扩散率的测量

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In this work, an improved mathematical model was proposed for simulation of the diffusion of dibenzothiophene (DBT) molecules inside the porous materials in liquid phase. The experimental data of the diffusion were obtained in some silica adsorbents with uniform pore structure. The intrinsic pore diffusivity and intrinsic surface diffusivity of molecules were obtained through optimizing the parameters in the mathematical model with the experimental data. The bulk diffusivity of molecules in solution was obtained when the pore size of the silica adsorbents was large enough. The correlation of the intrinsic pore diffusivity with the ratio of diffusion molecular size to pore size of porous materials was established. In addition, the effect of pore size on the ratio of surface mass transfer to total mass transfer was studied and it was found that the smaller the pore size of porous materials, the higher the ratio of surface mass transfer to total mass transfer. (C) 2018 Elsevier Ltd. All rights reserved.
机译：在这项工作中，提出了一种改进的数学模型，用于模拟二苯并噻吩（DBT）分子在液相中的多孔材料内的扩散。在一些具有均匀孔结构的二氧化硅吸附剂中获得扩散的实验数据。通过使用实验数据优化数学模型中的参数来获得分子的内在孔隙扩散性和固有表面扩散性。当二氧化硅吸附剂的孔径足够大时，获得溶液中分子的块状扩散性。建立了具有与扩散分子大小与多孔材料孔径的扩散分子大小比率的相关性孔隙扩散率的相关性。此外，研究了孔径对表面传质与总传质的比率的影响，发现多孔材料的孔径越小，表面质量传递与总传质的比例越高。 （c）2018年elestvier有限公司保留所有权利。

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