Facilitated transport

In this paper a general review on different membrane processes and membrane reactors was done. As the main aim of this paper is to review the application of membrane processes in petrochemical industry, processes such as olefin/paraffin separation, light solvent separation, solvent dewaxing, phenol

Fixed-site-carrier (FSC) membranes for CO2 capture were prepared and investigated using commercial high molecular weight polyvinyl amine (PVAm) casted on two polysulfone (PSf) supports with different molecular weight cut-off (20,000 and 50,000). Using humidified premixed gas (10 mol% CO2, 90 mol% N2

Facilitated transport of Cs-137 across supported liquid membranes (SLM) containing a calix-crown ligand viz. calix[4]arene-bis(crown-6) (CC), calix[4]arene-bis(o-benzocrown-6) (CBC) or calix[4]arene-bis(napthocrown-6) (CNC) was investigated. The feed consisted of dilute nitric acid solutions while t

A copolymeric membrane material containing a tertiary amino group was synthesized by radical copolymerization of 2-(N,N-dimethyl amino) ethyl methacrylate and acrylonitrile. The chemical structure of the copolymer was analyzed by viscosity measurement, elemental analysis, FTIR and X-ray diffraction

Transport of metal ions through supported liquid membranes has been investigated. A general dimensionless model for mass transfer coefficient is proposed which consists of diffusional, equilibrium and process parameters also properties of the membrane. Nine dimensionless equations for mass transfer

The application of activated composite membranes (ACMs) and polymer inclusion membranes (PIMs) for the transport of Pb(II), Cd(II), and Zn(II) in a continuous extraction–reextraction system using organophosphorous acids as carriers was examined. The ion carriers, DEHPA, Cyanex 301, and Cyanex 302, w

A liquid/liquid extraction process mediated by membrane contactors containing fixed recognition sites is being proposed for isomer discrimination. Cyclodextrins (CDs) are able to form inclusion complex of different stability with organic molecules depending on their shape and size. In this paper, we

The transport of cobalt (II) ions through bulk liquid membrane containing di(2-ethylhexyl) phosphoric acid (D2EHPA) in kerosene as mobile carrier and protons as counterions in the product phase (H2SO4) was studied. The transport kinetics was analysed by means of a kinetic model involving two consecu

A new membrane material containing facilitated transport groups for carbon dioxide has been synthesized through the hydrolysis of polyvinylpyrrolidone (PVP) obtained by radical polymerization. The composite membrane was prepared with the hydrolysate as the top layer and microporous membrane as the s

A 6FDA (4,4‘-hexafluoro isopropylidene diphthalic anhydride) based copolyimide has been synthesized containing the diamines DABA (3,5-diamino benzoic acid) and a 15-crown-5-diamine to separate propylene/ propane mixtures. With the carboxylic acid group of DABA crosslinking the polymer chains is poss