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Simulation of Mass Transfer Enhancement in the Pervaporation Process of Elliptical Hollow Fiber Membrane

Authors： HU Bi-Han, YANG Dong, WANG Yang, CAO Qing-yuan, YUAN yu-cheng, ZHANG Xin, ZHUANG Liwei, XU Zhen-Liang

Units： School of Chemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China

KeyWords： Computational fluid dynamics; Concentration polarization; Hollow fiber membrane; Pervaporation dehydration

ClassificationCode：TQ028.3

year,volume(issue):pagination： 2022,42(1):65-71

Abstract：

A three-dimensional hollow fiber membrane pervaporation mass transfer model is established and the influence of the cross-sectional shape of the membrane tube on the mass transfer of the pervaporation process is studied. This model has good consistency with Leveque mass transfer correlation equations, and under the same operating conditions, this model has the same mass transfer enhancement effect as the elliptical hollow fiber membrane contactor. The research results show that: compared with the traditional circular cross-section hollow fiber membrane, the elliptical cross-section can reduce the mass transfer resistance of the boundary layer in the membrane tube significantly. When the membrane resistance is much smaller than the boundary layer resistance, the permeation flux of the elliptical cross-section membrane can be increased by 0.6%-28% as the axis ratio of the elliptical membrane is increased from 1 to 3. Therefore, the hollow fiber membrane with elliptical cross-section has a good mass transfer enhancement effect during the pervaporation process.

Funds：

国家自然科学基金项目（21706066，22078091和2207892）。

AuthorIntro：

胡碧涵（1995-12），女，江苏苏州，硕士研究生，传递过程模拟

Reference：

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