Membrane evaporators

Susumu Nii, R. Selwyn Jebson, E. L. Cussler

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We have built and tested a flat-sheet membrane evaporator for removing water from dilute feed streams like milk and orange juice. The energy for the water's evaporation comes from steam channels next to the feed channels, so that the operation differs sharply from other forms of 'membrane distillation'. The membrane evaporator retains flavors effectively. Because it has an overall vapor phase mass transfer coefficient of about 1cm/s, it is only 68% efficient: only about 0.68kg water is evaporated per kg steam condensed. This efficiency should be over 95% for a membrane which is 10 times more permeable.

Original languageEnglish (US)
Pages (from-to)149-159
Number of pages11
JournalJournal of Membrane Science
Issue number1-2
StatePublished - May 31 2002


  • Liquid permeability and separations
  • Membrane distillation
  • Pervaporation

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