Abstract
The influence of temperature on the separation factor, diffusion process, permeation rate, and permeability coefficient ( k) for hydrolysis of ethyl acetate using a standard poly(vinyl alcohol) (PVA) membrane by pervaporation was investigated. The preliminary data presented in this work was obtained using a simple pervaporation technique built in-house. The experiments were conducted at 80, 65, 50 and 35°C. The initial feed composition was: water 10% (A), ethyl acetate 40% (B), and acetic acid 50% (C) (all weight percent basis). The composition of all the constituents in the feed reservoir decreased with time. Separation factors ranging between 35 and 120 were obtained for ethyl acetate and acetic acid. The separation factors followed the order α A/B> α A/C at 80°C. The influence of reaction temperature and molecular size on the permeation rate and separation factor is discussed. The role of water as a plasticizing agent and the effect of interaction between permeates on the rate of permeation of individual components is also discussed.
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