Solvent resistant chitosan/poly(ether-block-amide) composite membranes for pervaporation of n-methyl-2-pyrrolidone/water mixtures

Pervaporation separation of acetic acid/water mixtures through sodium alginate/polyaniline polyion complex membrane

“…PV is highly efficient to separate azeotropic mixtures and close boiling liquid mixtures whereas in traditional distillation an entrainer is required to recover pure solvents which adds an additional and tedious separation step to remove the entrainer as well [1,2]. In PV process mass transfer can be described by solution-diffusion mechanism.…”

“…Moraveji et al 2013 [15] modeled a pervaporation process with polydimethylsiloxane (PDMS) membrane for dehydration of ethanol. In our earlier studies, a combined model based on molecular modelling and CFD has been reported for the dehydration of liquid propellants [16] and n-Methyl-2-pyrrolidone [2].…”

“…The transport mechanism in PV process within the dense membrane is represented in Fig. 1 which involves three steps: (1) sorption into the membrane at the upstream side, (2) diffusion through the membrane and (3) desorption into a vapor phase at the downstream side.…”

Novel Composite Membranes Based on Chitosan Copolymers with Polyacrylonitrile and Polystyrene: Physicochemical Properties and Application for Pervaporation Dehydration of Tetrahydrofuran

“…This makes it possible to increase the process performance by depositing a thin selective polymer layer onto a porous support that provides mechanical strength and does not affect mass transfer [27,28]. CS was extensively studied for composite membrane formation [29,30,31,32,33,34]. A CS/Polytetrafluoroethylene composite membrane was used to separate the methanol/toluene mixture by pervaporation [29].…”

“…In this case, a CS-polyvinyl alcohol blend was cross-linked with glutaraldehyde in order to obtain stability in presence of a water selective layer. Another CS membrane with a porous poly(ether-block-amide) support was used for the dehydration of n-methyl-2-pyrolidone [31]. For the feed mixture containing 4.6 wt.…”