Authors : Yit Thai Ong and Soon Huat Tan
Abstract: Diffusion coefficient of a component provides insightful information on the mobility of a component in the membrane. In this study, the diffusion coefficient of water and ethylene glycol in the pervaporation dehydration of ethylene glycol and water binary mixture using a buckypaper supported ionic liquid membrane (BP-SILM-70) was estimated using the modified Maxwell-Stefan equation. The effect of variation in feed concentration on the diffusion coefficient was studied. It is noticed that the diffusion coefficients for water and ethylene glycol were increased with increasing feed concentration of water. Also, it is interesting to note that the relation between the diffusion coefficient of water and ethylene glycol obtained using the modified Maxwell-Stefan equation can be correlated with the feed concentration using an exponential factor relation.
Yit Thai Ong and Soon Huat Tan, 2017. Effect of Feed Concentration on Membrane’s Diffusivity in Pervaporation Dehydration Ethylene Glycol and Water Binary Mixture. Journal of Engineering and Applied Sciences, 12: 8365-8370.