Mass and heat transport resistance in pervaporation process

  • Noworyta A
  • Kubasiewicz-Ponitka M
  • Koziol A
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Abstract

Using a solution-diffusion mechanism, the rate of mass transport in
pervaporation process was determined. A method to determine the
parameters of the applied model, i.e., mass transport coefficients in
the liquid and gas phase and partition coefficients on both sides of
membrane surface was presented. Experiments were conducted in
phenol-water and p-cresol-water system using a PDMS composite membrane
(Pervatech, the Netherlands). Results of vacuum pervaporation were used
to calculate mass transfer resistance in the liquid phase and the
partition coefficient on the membrane surface. Experimental values
obtained in vacuum pervaporation have shown that resistance in the
liquid phase is in the range from 10 to 40% of the total resistance and
cannot be neglected. The experiments with a sweep gas pervaporation
process allowed to determine mass transport resistance in the inert
phase, which appeared to be a limiting parameter of the mass transport
rate.

Author-supplied keywords

  • Vacuum pervaporation; Sweep gas pervaporation; Mas

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Authors

  • Andrzej Noworyta

  • Monika Kubasiewicz-Ponitka

  • Antoni Koziol

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