Pervaporation membranes endowed with catalytic properties, based on polymer blends

Transport properties of crosslinked acrylonitrile butadiene rubber/poly(ethylene-co-vinyl acetate) blends

“…Diffusion and transport of organic solvents through polymeric materials have been a subject of fundamental interest [1][2][3][4][5] and the technological importance of the molecular transport of solvents in polymers plays a vital role in a variety of applications such as separation process, 6 food packaging, 7 controlled drug release, 8 reverse osmosis, 9 and microelectronics. 10 As far as these applications are considered, it is quite essential to evaluate the dimensional stability of the polymeric materials in the presence of aggressive liquids.…”

Potential of Pervaporation and Vapor Separation with Water Selective Membranes for an Optimized Production of Biofuels—A Review

“…In the esterification reaction of an acid with an alcohol, for example, the reactants diffuse into the catalytic layer to be converted to ester and water (see Figure 3); then the ester returns to the liquid mixture whereas the water is removed in situ. Consequently, the hydrolysis of the ester is limited while the conversion is enhanced compared to the values obtained using a non-catalytic MR [88,92,93]. On account of this, Zhang et al employed a catalytically active PV membrane to improve the conversion of acetic acid in the esterification reaction with n-butanol.…”

Aspects of Immobilisation of Catalysts on Polymeric Supports

“…Better separations were realised by preparing multilayer membranes by casting the catalytically active polymer mixture on top of a PVA membrane. [245,246] H-Nafion tubes were used as alternative one-layered bi-functional membranes. [247] Coupled to a homogeneous Diels-Alder alkylation, the reaction temperature was maintained to the desired low temperature [248] thanks to the heat of evaporation needed for the compounds to permeate.…”