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Air permeability and water vapor permeability of naphion membranes were measured using specially built instruments. Air permeability was almost zero. Water vapor permeability was... these results has been presented to explain absorption and transport of water vapor through naphion membranes. Keywords: Naphion membrane; Vapor permeation; Air permeation 1. Introduction Many novel membranes with unusual characteristics are currently being manufactured to meet the growing demands o ...
Desalination 149 (2002)
Characterization of film transport properties for organic vapors using the time-lag method — interest and limitations
The time-lag method can be easily used to characterize transport polymer features for permanent gases whereas with volatile organic vapors (VOCs) this routine procedure does not give valuable results, in particular in case of diffusion varying with activity, swelling of the polymer or... computed with adequate values of parameters for comparison with experimental values. Keywords: Time lag; Upstream pressure step; Diffusion; Vapor permeation; PDMS 1. Introduction The transport of gases or vapors through a dense polymer can be typically described by the solution–diffusion model .
Desalination 144 (2002)
Supported-liquid membranes using four kinds of triethylene glycol (TEG) liquids were used for the VOC vapor removal from air. The supported-liquid membrane was a double-layer type, in which a liquid membrane was placed on a hydrophobic microporous... was a double-layer type, in which a liquid membrane was placed on a hydrophobic microporous membrane. This construction enabled the vacuum mode permeation of the VOC vapor through the TEG liquid membranes. In the experiments using a flat type membrane cell, the VOC vapors were effectively remove ...
Desalination 234 (2008)
... as terephthalic acid (TPAc), 5-tert-butylisophthalic acid (TBPAc), and 4,4N-hexafluoroisopropylidenedibenzoic acid (6FDAc). The pervaporation and vapor permeation performance of the above novel aromatic polyamide membranes for dehydrating an aqueous alcohol solution was investigated. Compared wit ...
Desalination 148 (2002)
... the separation of a mixed solution of benzene and cyclohexane using a supported liquid membrane (SLM) based on ionic liquids. In this study, vapor permeation (VP) of benzene/cyclohexane through a SLM using ionic liquids based on 1-alkyl-3-methylimidazolium and quaternary ammonium salts wa ...
Desalination 241 (2009)