Dehydration of ethylene glycol by pervaporation using hydrophilic IPNs of PVA, PAA and PAAM membranes

Burshe, M. C.; Sawant, S.B.; Joshi, Jyeshtharaj B.; Pangarkar, Vishwas G.

doi:10.1016/s1383-5866(97)00061-0

Cited by 34 publications

(14 citation statements)

References 18 publications

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“…Pervaporation involves a phase change of the permeant from liquid to vapor, and as an approximation, the heat of evaporation ( H V ) can be used to measure the effect of temperature on the driving force for permeation. Subtraction of the heat of evaporation ( H v ) from the above activation energy (E J ) values would give the activation energy for permeation that characterizes temperature dependence of the membrane permeability (E P ) [20,[22][23][24]. The activation energy so obtained (E P ) and the heat of evaporation ( H v ) can thus be used to measure the contributions of temperature increase to the increases in the membrane permeability and the driving force for permeation.…”

Section: Pervaporationmentioning

confidence: 99%

Permselectivity, solubility and diffusivity of propyl propionate/water mixtures in poly(ether block amide) membranes

Mujiburohman

Feng

2007

Journal of Membrane Science

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Section: Pervaporationmentioning

confidence: 99%

Permselectivity, solubility and diffusivity of propyl propionate/water mixtures in poly(ether block amide) membranes

Mujiburohman

Feng

2007

Journal of Membrane Science

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“…Extensive research has been carried out to separate ethanol-water mixtures by PV. Apart from ethanol-water mixtures, work dealing with various applications was also published to explore the potential of PV (4)(5)(6). Because of its high selectivity and low energy requirements, PV is an alternative separation method in the chemicals industry.…”

mentioning

confidence: 99%

Dehydration of glycerine‐water mixtures by pervaporation

Burshe

Sawant

Pangarkar

1999

J Americ Oil Chem Soc

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Dehydration of glycerine-water mixtures by pervaporation (PV) was studied with Nafion  (NA), cellulose triacetate (CA), polyimide, carboxylated polyvinyl chloride (CPVC), and polyethersulfone (PES) membranes. PES membrane yielded the highest selectivity (6580) and CPVC membrane yielded the lowest selectivity (1552) at 5% by weight of water in the feed and 30°C. The NA membrane yielded the highest permeation flux (0.2-1.45 kg/m 2 h) of water over the entire water concentration range. Energy of activation of permeation for water was in the range of 7-15 kJ/mol, being highest for CPVC and lowest for CA. Comparison of PV and vapor liquid equilibrium data showed that the former gave better results, particularly for concentrating glycerine above 90 wt%.Pervaporation (PV) is a membrane-based separation process suitable for separating liquid mixtures comprising azeotropes and close boiling and temperature-sensitive products (1-3). Extensive research has been carried out to separate ethanol-water mixtures by PV. Apart from ethanol-water mixtures, work dealing with various applications was also published to explore the potential of PV (4-6). Because of its high selectivity and low energy requirements, PV is an alternative separation method in the chemicals industry.Glycerine is used in various products as a solvent, humectant, plasticizer, emollient, sweetener, a fermentation nutrient in the production of antibiotics, antifreeze in automobiles, etc. In the fat-splitting process glycerine is a co-product of soap manufacture and the manufacture of fatty acids (7). Removal of water from crude glycerine is an important step in the production of pure glycerine by the fat-splitting process. Presently, water is removed by evaporation/distillation. The high boiling point of glycerine (290°C), along with its relatively low decomposition temperature (190°C), necessitates the use of vacuum to lower the temperature requirements. For instance, at 10 mm Hg absolute the boiling point of glycerine is 166°C. Even this option cannot prevent the degradation and polymerization of glycerine (7). PV, which can achieve dehydration at much lower temperature, is therefore an attractive alternative.In the present work, attempts were made to use PV for dehydrating aqueous glycerine as a convenient and energy-efficient technique. Various polymeric membranes were prepared and tested for pervaporation of glycerine-water mixtures. PV performance was evaluated in terms of selectivity and flux. The effects of functional groups of the polymer comprising membrane, feed concentration, and feed temperature on the flux and selectivity were studied. Here, selectivity is defined as follows:where α = selectivity (dimensionless), X A = concentration in the feed (wt%) with water, and Y B = concentration in the permeate (wt%) with glycerine. Overall performance of the membrane was evaluated in terms of pervaporation separation index (PSI), defined by Huang (8) as given below:where C pwater and C fwater are water concentrations in the permeate and feed, respectively...

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“…These mixtures of cross-linked polymers are held together by permanent entanglement and chain interlocking, which endow the IPNs with forced compatibility and synergistic effect. The special structure and variety of components of IPNs make it possible to tailor the properties of IPN membranes, so as to improve the dimensional stability, thermal and mechanical properties as well as reduce the phase separation of the membranes [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Novel interpenetrating polymer network sulfonated poly (phthalazinone ether sulfone ketone)/polyacrylic acid proton exchange membranes for fuel cell

et al. 2007

Journal of Membrane Science

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Dehydration of ethylene glycol by pervaporation using hydrophilic IPNs of PVA, PAA and PAAM membranes

Cited by 34 publications

References 18 publications

Permselectivity, solubility and diffusivity of propyl propionate/water mixtures in poly(ether block amide) membranes

Permselectivity, solubility and diffusivity of propyl propionate/water mixtures in poly(ether block amide) membranes

Dehydration of glycerine‐water mixtures by pervaporation

Novel interpenetrating polymer network sulfonated poly (phthalazinone ether sulfone ketone)/polyacrylic acid proton exchange membranes for fuel cell

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