摘要
Toprovide a theoretical basis for optimizing the pervaporation procedure, a mass transfer model for pervaporation for binary mixtures was developed basedon the multi-fields synergy theory. This model used the mechanism of sorption-diffusion-desorption and introduced a diffusion coefficient, which was dependent on the feed concentration and temperature. Regarding the strong coupling effect in the mass transfer, the concentration distribution in membrane was predicted using the Flory-Huggins thermodynamic theory. The batch experiments and other experiments with constant composition-were conducted-using a modified chitosan pervaporatioffmembrane to separate tert-butyl alcohol （TBA）-water mixtures. The parameters of the mass transfer model were obtained from the flux of the experiments with a constant composition and the activity coefficients available through phase equilibrium equation, using the Willson equation in the feed side and the Flory-Huggins thermodynamic theory within the membrane The simulation results of the experiments .are in good agreement with the results, of the experiments.
为优化 pervaporation 过程提供一个理论基础，为为二元混合物的 pervaporation 的一个传质模型基于多地协同作用理论被开发。这个模型使用了 sorption-diffusion-desorption 的机制并且介绍了一个扩散系数，它依赖于 feed 集中和温度。关于在传质的强壮的联合效果，在膜的集中分发用 Flory-Huggins 热力学的理论被预言。有经常的作文的批实验和另外的实验用修改脱乙酰几丁质 pervaporation 膜被进行分开 tert 丁基酒精(TBA ) 水混合物。传质模型的参数与一篇经常的作文和通过相平衡方程可得到的活度系数从实验的流动被获得，用在 feed 方面和 Flory-Huggins 的 Willson 方程在膜以内的热力学的理论。实验的模拟结果在对实验的结果的好同意。
基金
Supported by the Key Project of National Natural Science Foundation of China （No.20436040）, and the National Natural Science Foundation of China （No.20476084, No.20776117）.
