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Pervaporation of athermal mixture of benzene–toluene by poly(ethylene terepthalate) membrane and synergetic effect on concentration dependence of diffusion rate
Author(s) -
Suzuki Fumio,
Onozato Kenji,
Takahashi Naomichi
Publication year - 1982
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1982.070270628
Subject(s) - pervaporation , toluene , permeation , benzene , membrane , diffusion , chemistry , partition coefficient , analytical chemistry (journal) , chromatography , chemical engineering , organic chemistry , thermodynamics , biochemistry , physics , engineering
The pervaporation of the athermal liquid mixture of benzene–toluene by a PET membrane was examined. Sorbed amounts of benezene and toluene in the PET membrane were almost similar to each other, and each amount of them sorbed from the mixture showed linear relationships to their weight fraction in the mixture. The permeation rate of benzene from its single liquid was 2.5 times of that of toluene, and the permeation rates of benzene and toluene from mixtures of various composition showed concave and convex curves to the feed axis, respectively. Semilogarithmic relations between the apparent diffusion coefficient for toluene–PET, obained from steady‐state permeation rates and sorbed amounts, and its concentration in the membrane showed a negative slope. This result could be explained by the fact that the diffusion rate of one component in pervaporation of the binary liquid mixture was affected by the other coexisting in the system.