Characterisation and modelling of transient transport through dense membranes using on-line mass spectrometry

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Abstract

Abstract: This work presents a methodology for characterising solute transport through pervaporation membranes or, more generally, through dense membranes, in the whole transient regime. A real-time characterisation of transport through dense membrane is obtained by using on-line mass spectrometry (MS) monitoring, which allows to acquire the concentration of solutes in the permeate compartment with time intervals of 2 seconds (and lower if required). Time-dependent diffusion coefficients, D(t), were calculated for the whole operation period, including the initial transient period. Based on these values it is possible to infer about the relevance of solute-membrane interactions and rearrangement of the membrane structure due to the presence of permeant solutes. Finally, based on the information acquired, a mathematical model was developed in order to obtain solute concentration profiles inside the membrane and their evolvement along time.
Original languageEnglish
Pages (from-to)213-222
JournalJournal of Membrane Science
Volume479
DOIs
Publication statusPublished - 1 Apr 2015

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Keywords

  • POLYMERIC MEMBRANES
  • GAS SEPARATIONS
  • AROMA COMPOUNDS
  • PERVAPORATION
  • DIFFUSION
  • PERMEATION
  • SORPTION
  • DEHYDRATION
  • NANOFILTRATION
  • RECOVERY
  • Transient diffusion
  • Time-dependent diffusion coefficients
  • Mass spectrometry
  • Pervaporation
  • On-line monitoring

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