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- W2073783221 abstract "Permeability coefficients, apparent diffusion coefficients, and apparent solubility coefficients of n-butane and 1-butene gases across anhydrous sulfonated and carboxylated polyperfluorocarbon-type cation exchange membranes which have different counterions of Na+, Ag+, Co2+, and Ni2+ were investigated at 25 degreesC. Prior to the n-butane and 1-butene gas permeability measurements, O2 gas permeabilities were measured. From the results, it was shown that those membranes appeared to dense membranes. In each membrane, the permeability of 1-butene was higher than that of n-butane. In comparison with the same counterion membranes, the sulfonated membrane had higher permeability than the carboxylated membrane for both gases. The Ag+-form sulfonated membrane exhibited the highest permeability coefficient for 1-butene and the ideal separation factor of 1-butene/n-butane was 10.3. This is caused by the high solubility of 1-butene gas. From the calculated result using the MO method, it was shown that the interaction between the olefin and metal ions was weakened by the influence of a charged group. Therefore, the affinity between the olefin and Co2+ or Ni2+ did not function in the membrane as expected because of the divalent ions. This is the reason why the solubility coefficients of Co2+- and Ni2+-form membranes were smaller than those of the Ag+-form membrane. Copyright 1998 Academic Press." @default.
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- W2073783221 date "1998-12-01" @default.
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- W2073783221 title "Effect of Fixed Charge Groups and Counter Ions on the Transport Phenomena of Paraffin and Olefin across Anhydrous Negatively Charged Membranes" @default.
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- W2073783221 doi "https://doi.org/10.1006/jcis.1998.5838" @default.
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