Modeling and simulation of pervaporation (PV) separation for alcohol dehydration

Merging Proline:Xylitol Eutectic Solvent in Crosslinked Chitosan Pervaporation Membranes for Enhanced Water Permeation in Dehydrating Ethanol

“…Such a plasticization effect becomes relevant in the dehydration of alcohols using hydrophilic polymer membranes (such as PVA, CS, etc.) [42]. As part of the membrane characterization, it was seen that both DES-free and DEScontaining membranes display low uptake values at low concentrations of water in the ethanol mixtures, as displayed in Figure 8.…”

“…Here, the solvent's polarity becomes important for its own transport and separation [32]. Apart from that, the diffusion of water across the membranes can increase with an increase in feed water activity, which is ascribed to the plasticization effect on the membrane due to the increase in the free volume between the polymer chains, facilitating the diffusion of the molecules through the membrane matrix [41,42]. Fundamentally, the first transport resistance in a PV system is generally assumed to be in the membrane itself, according to its non-porous structure.…”

“…Such a plasticization effect becomes relevant in the dehydration of alcohols using hydrophilic polymer membranes (such as PVA, CS, etc.) [42].…”