Abstract
Both pervaporation and vapor permeation experiments using silicone rubber membrane were carried out for the ethanol-water mixtures. Preferential permeation of ethanol was obtained in the pervaporation method, but was not shown in the vapor permeation method. The total permeation rate increased with feed temperature and decreased with downstream pressure in the both methods. The total permeation rate was correlated with feed temperature by the Arrhenius' equation. Temperature dependency on selectivity was complicated in the pervaporation. It was found that the silicone rubber was swelled by ethanol solution over 80wt%.
