Permeability of composite membranes Part 3. - Series array of elements

O. Kedem, A. Katchalsky

Research output: Contribution to journalArticlepeer-review

233 Scopus citations

Abstract

The permeability coefficients of membranes composed of a series-array of elements are evaluated from the coefficients of the membrane elements. The calculations are carried out for stationary flows and assume continuity of chemical potentials across the interfaces between elements. Ex-tensive use is made of " corresponding quantities ", representing concentrations, pressures and electromotive forces in the membrane in terms of those of aqueous solutions equilibrated with the examined volume element of the membrane phase. It was found that the overall resistances (reciprocal permeability coefficients) are not generally composed by addition of those of the elements. Moreover, the system is not described by the linear phenomenological equations, unless the flows are very slow. Polarity of flow is to be expected in many cases. A few numerical examples demonstrate the combination of the elementary coefficients and the polarity of flows. These examples are based on the model of Teorell and Meyer-Sievers.

Original languageEnglish
Pages (from-to)1941-1953
Number of pages13
JournalTransactions of the Faraday Society
Volume59
DOIs
StatePublished - 1 Jan 1963
Externally publishedYes

ASJC Scopus subject areas

  • General Engineering
  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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