Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory

›› 2008, Vol. 16 ›› Issue (1): 79-83.

Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory

雷震, 吴莹莹, 路士庆, 杨伯伦

Department of Chemical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

收稿日期:2007-05-10 修回日期:2007-10-27 出版日期:2008-02-28 发布日期:2008-02-28
通讯作者: YANG Bolun, E-mail: blunyang@mail.xjtu.edu.cn
基金资助:
the Key Project of National Natural Science Foundation of China (No.20436040);the National Natural Science Foundation of China (No.20476084, No.20776117)

Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory

LEI Zhen, WU Yingying, LU Shiqing, YANG Bolun

Department of Chemical Engineering, Xi’an Jiaotong University, Xi’an 710049, China

Received:2007-05-10 Revised:2007-10-27 Online:2008-02-28 Published:2008-02-28
Supported by:
the Key Project of National Natural Science Foundation of China (No.20436040);the National Natural Science Foundation of China (No.20476084, No.20776117)

摘要/Abstract

摘要： To provide a theoretical basis for optimizing the pervaporation procedure, a mass transfer model for pervaporation for binary mixtures was developed based on 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 pervaporation membrane 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 equi-librium 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.

关键词: pervaporation, membrane, mass transfer model, multi-fields synergy theory, coupling effect

Abstract: To provide a theoretical basis for optimizing the pervaporation procedure, a mass transfer model for pervaporation for binary mixtures was developed based on 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 pervaporation membrane 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 equi-librium 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.

Key words: pervaporation, membrane, mass transfer model, multi-fields synergy theory, coupling effect

雷震, 吴莹莹, 路士庆, 杨伯伦. Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory[J]. , 2008, 16(1): 79-83.

LEI Zhen, WU Yingying, LU Shiqing, YANG Bolun. Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory[J]. , 2008, 16(1): 79-83.

参考文献

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Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory

Mass Transfer Modeling in Pervaporation Based on Multi-fields Synergy Theory

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