Abstract
The separation performance efficiencies of polydimethylsiloxane (PDMS)-based (PERVAP™ 4060, PDMS 04-075, and PDMS 04-123) and polyoctylmethylsiloxane (POMS)-based (POMS 05-119) organophilic composite membranes were investigated, examining the amount of methyl acetate recovered from binary methyl acetate–methanol mixtures. The effects of feed composition (at 50°C) and feed temperature (40°C, 50°C, and 60°C) were investigated. Based on temperature variation tests, the enthalpies of evaporation for methyl acetate and methanol were estimated. Additionally, an empirical model was built on the basis of the solution-diffusion transport equation and extended to account for swelling characteristics of the membrane.Whereas the membrane POMS 05-119 can be applied under the conditions described, particularly when the goal is to overcome the azeotropic barrier, separation performance of the PDMS-based membranes was inferior to the performance of a conventional flash distillation method.
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