Recent membrane development for pervaporation processes

Abstract

Pervaporation has been regarded as a promising separation technology in separating azeotropic mixtures, solutions with similar boiling points, thermally sensitive compounds, organic-organic mixtures as well as in removing dilute organics from aqueous solutions. As the pervaporation membrane is one of the crucial factors in determining the overall efficiency of the separation process, this article reviews the research and development (R&D) of polymeric pervaporation membranes from the perspective of membrane fabrication procedures and materials.

Review: membrane materials for the removal of water from industrial solvents by pervaporation and vapor permeation

“…is to qualitatively capture the typical performance differences between commercially available PV/VP membrane materials. Similar trends in performance have been reported through direct comparisons of two or more of these types of materials for water/solvent separations …”

Ag-exchanged NaY zeolite introduced polyvinyl alcohol/polyacrylic acid mixed matrix membrane for pervaporation separation of water/isopropanol mixture

“…In recent years, numerous polymeric membranes have been developed 6 and employed in IPA dehydration [7][8][9] because of advantages such as lower costs, easier fabrication processes, and superior scalability. Polyvinyl alcohol is a hydrophilic polymer used in such membranes; because of its good chemical, thermal resistance, and lm-forming properties, [7][8][9][10][11] it has proven to be the most promising and consistent candidate in PV dehydration applications.…”

Separation of Trimethyl Borate from a Liquid Mixture by Pervaporation

“…Simplicity and flexibility are the general advantages of membrane separation processes [3][4][5]. In practice, there are wide uses in various industries, for example in the pharmaceutical [6,7] and petrochemical [8] industries, in solvent and detergents production [9], etc.…”

“…The resulting composition of the pervaporate therefore does not have to match the liquid-vapor equilibrium and depends mainly on the solubilities and diffusion coefficients in the membrane of the components of the mixture that needs to be separated. The diffusion of matter in the membrane is also the controlling process of the whole process and its driving force is the pressure gradient [4,17]. The membranes are dense, made of polymeric or ceramic materials, showing different permeabilities according to different components.…”