Modified pore-flow model for pervaporation mass transport in PVDF hollow fiber membranes for ethanol-water separation

Panu Sukitpaneenit, Tai-Shung Chung*, Lan Ying Jiang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Scopus citations


For the first time, the mass transport phenomenon in pervaporation of the ethanol/water system via PVDF asymmetric hollow fiber membranes has been demonstrated through the pore-flow model and a newly modified pore-flow model has been proposed. The modified pore-flow model differs from the pore-flow model by factoring in the contribution of Knudsen flow to vapor transport, which was ignored by the pore-flow model. The correlation of transport parameters to membrane pore size is explored and it is found that the pore size expansion (including the change of membrane surface morphology) is strongly dependent on the solvent in contact. The modified pore-flow model shows a better prediction for the permeate composition than the pore-flow model and both models exhibit an excellent prediction of total permeate mass flux. The significance of Knudsen flow contribution in vapor-phase transport as stated in the modified pore-flow model is discussed from the experimental and theoretical aspects.

Original languageEnglish (US)
Pages (from-to)393-406
Number of pages14
JournalJournal of Membrane Science
Issue number1-2
StatePublished - Oct 1 2010


  • Mass transport
  • Modified pore-flow model
  • PVDF hollow fiber membrane
  • Pervaporation
  • Pore-flow model

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Science(all)
  • Biochemistry
  • Filtration and Separation

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