SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (3): 758-765.DOI: 10.1016/j.cjche.2019.11.009

• Separation Science and Engineering • Previous Articles     Next Articles

Salt transport in polymeric pervaporation membrane

Dihua Wu1,2, Aoran Gao2, Xianshe Feng2   

  1. 1 College of Materials and Environmental Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, China;
    2 Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo N2L 3G1, Ontario, Canada
  • Received:2019-06-24 Revised:2019-11-07 Online:2020-06-11 Published:2020-03-28
  • Contact: Xianshe Feng
  • Supported by:
    Research support from the Natural Sciences and Engineering Research Council (NSERC) of Canada and Zhejiang Province Natural Science Foundation of China (LQ20B060002) are gratefully acknowledged. We also wish to acknowledge Arkema Inc. for generously supplying the polymer used in making the membranes.

Salt transport in polymeric pervaporation membrane

Dihua Wu1,2, Aoran Gao2, Xianshe Feng2   

  1. 1 College of Materials and Environmental Engineering, Hangzhou Dianzi University, Xiasha Higher Education Zone, Hangzhou 310018, China;
    2 Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo N2L 3G1, Ontario, Canada
  • 通讯作者: Xianshe Feng
  • 基金资助:
    Research support from the Natural Sciences and Engineering Research Council (NSERC) of Canada and Zhejiang Province Natural Science Foundation of China (LQ20B060002) are gratefully acknowledged. We also wish to acknowledge Arkema Inc. for generously supplying the polymer used in making the membranes.

Abstract: The salt transport in a PEBA membrane used in pervaporative desalination was studied. The concentration profile of salt in the membrane during pervaporation was investigated experimentally using a multilayer membrane. The salt was found to be sorbed in the membrane but was not removed during the pervaporative desalination process, and the salt concentration in the membrane varied linearly with position. High purity water was obtained as the permeate as long as the permeate side was kept dry under vacuum. The accumulated salt uptake in the membrane follows the order of MgCl2 > NaCl > Na2SO4. The solubility of salt in the membrane follows the order of MgCl2 > NaCl > Na2SO4. Both the permeability and diffusivity of salt in the membrane follow the order of NaCl > MgCl2 > Na2SO4. The permeability of salt in the membrane is not influenced by the feed salt concentration. It is mainly determined by the diffusion coefficients.

Key words: Concentration profile, Pervaporative desalination, Salt transport

摘要: The salt transport in a PEBA membrane used in pervaporative desalination was studied. The concentration profile of salt in the membrane during pervaporation was investigated experimentally using a multilayer membrane. The salt was found to be sorbed in the membrane but was not removed during the pervaporative desalination process, and the salt concentration in the membrane varied linearly with position. High purity water was obtained as the permeate as long as the permeate side was kept dry under vacuum. The accumulated salt uptake in the membrane follows the order of MgCl2 > NaCl > Na2SO4. The solubility of salt in the membrane follows the order of MgCl2 > NaCl > Na2SO4. Both the permeability and diffusivity of salt in the membrane follow the order of NaCl > MgCl2 > Na2SO4. The permeability of salt in the membrane is not influenced by the feed salt concentration. It is mainly determined by the diffusion coefficients.

关键词: Concentration profile, Pervaporative desalination, Salt transport