Dehydration of ethylene glycol by pervaporation using gamma alumina/NaA zeolite composite membrane

Jafari, Mostafa; Bayat, Arash; Mohammadi, Toraj; Kazemimoghadam, Mansoor

doi:10.1016/j.cherd.2013.04.016

Cited by 17 publications

(10 citation statements)

References 26 publications

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“…6 Moreover, Jafari et al (2012) demonstrated by a computational fluid dynamics (CFD) study that increasing feed flow rate can enhance feed kinetic energy substantially which in turn increases the extent of turbu- lence. 7 But at the same time a reverse trend was observed in case of separation factor plausibly due to the less pronounced coupling effect between EG and water molecules at the prevailing feed concentration of the present study. Further this could be due to the weaker EG-water hydrogen bonding interactions leading to low mutual drag between water and EG molecules and decelerating transport of EG molecules.…”

Section: Flux and Separation Factorcontrasting

confidence: 44%

“…Several recent studies have evaluated a number of pervaporative dehydration processes of EG using an assortment of polymeric or ceramic membranes. Some of these recently used membranes include polyvinyl alcohol/hyper-branched polyester, 2 polyvinyl alcohol/polypropylene, 3 polyamide/polydopamine, 4 polybenzimidazole/polyetherimide, 5 polyvinyl alcohol-Na-zeolite mixed matrix membrane, 6 γ-alumina-Na-zeolite, 7 Na-A zeolite, 8 polyvinylamine/polyvinyl alcohol-carbon nanotube 9 and so on. Wu et al (2015) reported a novel polymer of intrinsic microporosity for the separation of EG -water with separation factor of 24.2.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, Characterization and Application of Disodium Tetraborate Cross-Linked Polyvinyl Alcohol Membranes for Pervaporation Dehydration of Ethylene Glycol

Nath

Dave²

2018

ACSi

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Dehydration of ethylene glycol-water mixture was carried out in a laboratory pervaporation unit using a flat sheet membrane test cell. Polyvinyl alcohol-polyether sulfone (PVA-PES) composite membranes were synthesized and cross linked with two different concentrations, viz 0.2 and 0.5% of disodium tetraborate (borax). The derived membranes were extensively characterized for their morphology, intermolecular interactions, thermo-mechanical stability, and physicochemical properties using field emission scanning electron microscopy (FESEM), atomic force microscopy (AFM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and water uptake studies. The membrane performance was evaluated in terms of pervaporation flux, separation factor, selectivity, permeability and solute diffusion coefficients of EG-water mixture at varying feed flow rate. Both in terms of flux and separation factor PVA-PES-0.2% borax composite membrane was found superior to PVA-PES-0.5% borax crosslinked and its uncrosslinked counterpart. Cross-linking the composite with borax produced a membrane with lower crystallinity and a smaller swelling degree, but having improved thermostability and mechanical properties.

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Section: Flux and Separation Factorcontrasting

confidence: 44%

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Application of Disodium Tetraborate Cross-Linked Polyvinyl Alcohol Membranes for Pervaporation Dehydration of Ethylene Glycol

Nath

Dave²

2018

ACSi

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“…The membrane samples were ground well to make KBr pellets under a hydraulic pressure of 400 kg cm 22 and the spectra were recorded in the range of 600-4000 cm 21 . In each scan, the amount of membrane sample and KBr were kept constant in order to estimate the changes in the intensities of the characteristic peaks with respect to the amount of PMAA.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

“…However, the swelling behavior of chitosan membrane in an aqueous solution results to an increase of both solubility and diffusivity of organics, and consequently lowers the water permselectivity. Considerable efforts have been made in order to improve its overall performance by blending [16,17], crosslinking [18,19], surface modification [20], grafting [21], incorporating selective zeolite [22] developing organic-inorganic composites [23,24], etc. Among these, crosslinking is one of the most convenient and effective approaches to ensure a good permselectivity.…”

Section: Introductionmentioning

confidence: 99%

Preparation and pervaporation performance of chitosan-poly(methacrylic acid) polyelectrolyte complex membranes for dehydration of 1,4-dioxane

Choudhari

Premakshi

2016

Polym Eng Sci

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Polyelectrolyte complex (PEC) membranes composed of chitosan (CS) and poly(methacrylic acid) (PMAA) were prepared by mixing the polymer solutions in different ratios. The chemical interaction and crystallinity of the resulting PEC membranes were respectively analyzed by Fourier transform infrared spectroscopy (FTIR) and wide-angle Xray diffraction (WAXD). Differential scanning calorimetry (DSC) was used to characterize the thermal properties of the membranes. The membranes thus obtained were subjected to pervaporation (PV) separation of water-dioxane mixtures. Among the PEC membranes, membrane containing 30 wt% ratio of PMAA (M-3) exhibited the highest separation selectivity of 840 with a flux of 12.07 3 10 22 kg/m 2 h at 308C at 15 wt% of water in the feed. By the incorporation of NaY zeolite into PEC up to 5 wt%, we have been able to overcome the trade-off phenomenon existing between flux and selectivity in PV process. From the temperature dependent diffusion and permeation values, the Arrhenius activation parameters were estimated. The resulting activation energy values obtained for water permeation (E pw ) are much lower than those of dioxane permeation (E po ), suggesting that the developed membranes have higher separation efficiency for waterdioxane system. Based on the heat of sorption (DH s ) values, the mode of sorption was discussed. POLYM. ENG. SCI.,

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“…This process is often used for dehydration of hydrocarbons to obtain a high purity product, such as ethanol [5], isopropyl alcohol [6] and ethylene glycol [4,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Ceramic membrane synthesis based on alkali activated blast furnace slag for separation of water from ethanol

Azarshab

Mohammadi

Maghsoodloorad

et al. 2016

Ceramics International

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Dehydration of ethylene glycol by pervaporation using gamma alumina/NaA zeolite composite membrane

Cited by 17 publications

References 26 publications

Synthesis, Characterization and Application of Disodium Tetraborate Cross-Linked Polyvinyl Alcohol Membranes for Pervaporation Dehydration of Ethylene Glycol

Synthesis, Characterization and Application of Disodium Tetraborate Cross-Linked Polyvinyl Alcohol Membranes for Pervaporation Dehydration of Ethylene Glycol

Preparation and pervaporation performance of chitosan-poly(methacrylic acid) polyelectrolyte complex membranes for dehydration of 1,4-dioxane

Ceramic membrane synthesis based on alkali activated blast furnace slag for separation of water from ethanol

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