Effect of solvent properties on permeate flow through nanofiltration membranes. Part I: Investigation of parameters affecting solvent flux

Darío R. MacHado, David Hasson, Raphael Semiat*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

197 Scopus citations

Abstract

The objective of the present study was to characterize transport properties of solvents permeating through solvent resistant nanofiltration membranes that have only recently become available. Permeation flows of a number of solvents of different chemical families were measured in a batch cell. The solvents studied were alcohols, paraffins, ketones, acetates, and water, as well as their binary mixtures. The experimental data revealed a marked variation in the level of permeate flux among the various solvents. For instance, permeation flow of pentane was about 60-times faster compared to that of water while permeation flow of ethanol was about 10-times faster than that of water. The dependence of solution flux on the fractional composition of the solvents in the mixture was found to be highly non-linear. The flux of either pure or mixed solvents was mainly affected by surface tension and viscosity of the solvents. The flux of paraffins mixtures in particular was affected by the dielectric constant also. Copyright (C) 1999 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)93-102
Number of pages10
JournalJournal of Membrane Science
Volume163
Issue number1
DOIs
StatePublished - 1 Oct 1999
Externally publishedYes

Keywords

  • Flux
  • Nanofiltration
  • Organic solvents
  • Surface tension
  • Viscosity

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