Frontiers of Chemical Science and Engineering
>> 2019,
Volume 13,
Issue 3
doi:
10.1007/s11705-018-1780-1
REVIEW ARTICLE
Mass transport mechanisms within pervaporation membranes
. Key Laboratory for Green Chemical Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, China.. Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, China
Accepted: 2019-03-21
Available online: 2019-03-21
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Abstract
Pervaporation is an energy-efficient membrane technology for separating liquid molecules of similar physical properties, which may compete or combine with distillation separation technology in a number of applications. With the rapid development of new membrane materials, the pervaporation performance was significantly improved. Fundamental understanding of the mass transport mechanisms is crucial for the rational design of membrane materials and efficient intensification of pervaporation process. Based on the interactions between permeate molecules and membranes, this review focuses on two categories of mass transport mechanisms within pervaporation membranes: physical mechanism (solution-diffusion mechanism, molecular sieving mechanism) and chemical mechanism (facilitated transport mechanism). Furthermore, the optimal integration and evolution of different mass transport mechanisms are briefly introduced. Material selection and relevant applications are highlighted under the guidance of mass transport mechanisms. Finally, the current challenges and future perspectives are tentatively identified.
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