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Steady nonionic countergradient transport through membranes by coupled diffusion
Author(s) -
Notter R. H.,
Tam Y. M.,
Min S.
Publication year - 1979
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690250312
Subject(s) - membrane , diffusion , chemistry , mass transfer , cellophane , coupling (piping) , chromatography , thermodynamics , materials science , composite material , physics , biochemistry , organic chemistry
Coupled diffusion generated countergradient transport through membranes is analyzed by experimental and theoretical means. Membrane wedge interferometer experiments on an ethanolwater‐cellophane membrane system show that net countergradient mass transfer of the less permeable component ethanol may be generated over a wide concentration range. A theoretical analysis of an idealized membrane separating two binary bulk solutions is developed to display further the major features of diffusional coupling effects, and good agreement between observed and predicted countergradient transport characteristics is shown.