Development of novel pervaporation membranes for the separation of water–isopropanol mixtures using sodium alginate and NaY zeolite

Kariduraganavar, Mahadevappa Y.; Kittur, Arjumand A.; Kulkarni, Suyamindra S.; Ramesh, K.

doi:10.1016/j.memsci.2004.03.033

Cited by 84 publications

(45 citation statements)

References 32 publications

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“…In the literature, it is very well reported that incorporation of selective zeolite into a dense membrane greatly enhances the separation performance of the membrane due to a synergistic effect of molecular sieving action, selective adsorption and difference in diffusion rates [41][42][43][44]. This has prompted us to incorporate NaY zeolite into a membrane M-3, as it demonstrated the highest selectivity of 840 with a flux of 12.07 3 10 22 kg/m 2 h as indicated in Fig.…”

Section: Effect Of Zeolite Loading On Pervaporationmentioning

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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Section: Effect Of Zeolite Loading On Pervaporationmentioning

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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“…1,2 The removal of a certain liquid is accomplished by the partial pressure difference created on feed and permeates sides of the membrane. The principles of PV can be best understood through explanation of a two-step process 3 : an evaporation process and a membrane transfer process.…”

Section: Introductionmentioning

confidence: 99%

Modification of tetraethylorthosilicate crosslinked poly(vinyl alcohol) membrane using chitosan and its application to the pervaporation separation of water–isopropanol mixtures

Kulkarni¹,

Tambe²,

Kittur³

et al. 2005

J of Applied Polymer Sci

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ABSTRACT:Tetraethylorthosilicate crosslinked poly(vinyl alcohol) membrane was modified by varying the amounts of chitosan. The resulting membranes were characterized by Fourier transform infrared spectroscopy and differential scanning calorimetry. The effects of chitosan content and feed composition on the pervaporation performance of the membranes were analyzed. The modified membranes exhibit simultaneous increase of both flux and selectivity. The membrane containing 15 mass % of chitosan shows the highest separation selectivity of 2991, with a flux of 2.39 ϫ 10 Ϫ2 kg/(m 2 h) at 30°C for 10 mass % of water in the feed. The total flux and flux of water are almost overlapping each other, manifesting that the membranes could be used effectively to break the azeotropic point of waterisopropanol mixture, so as to remove water from the isopropanol. From the temperature dependent diffusion and permeation values, the Arrhenius activation parameters were estimated. The activation energy values obtained for water permeation (E pw ) are significantly lower than those of isopropanol permeation (E pIPA ), suggesting that the membranes developed here have higher separation ability for water-isopropanol system. In addition, difference was negligibly small between the activation energy values of total permeation (E p ) and water permeation (E pw ), indicating that coupled transport is minimal because of a higher selective nature of membranes. The E p and E D values ranged between 40.92 and 52.60, and 39.58 and 52.47 kJ/mol, respectively. The positive heat of sorption (⌬H s ) values observed in all the membranes suggests that Henry's mode of sorption is predominant.

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“…Generally, a decrease in free-volume leads to an increase in selectivity and a decrease in permeation flux. [38] But, water sorptions became equal for these membranes, while EtOH sorption increases significantly for PVA-1 membrane, with increasing the temperature. Figure 7b shows that the water sorption of the PVA-2 membrane increases with the increasing of temperature, while no appreciable change is observed for EtAc and EtAc sorptions.…”

Section: Sorption Resultsmentioning

confidence: 86%

Sorption and pervaporation results of clinoptilolite filled poly(vinylalcohol) membrane prepared for dehydration of aqueous organic mixtures

2013

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Clinoptilolite filled poly(vinylalcohol) membranes containing different weight percentages of zeolite were prepared by solution casting method, and the prepared membranes were characterised by scanning electron microscopy, thermogravimetric analysis and differential scanning calorimeter. Sorption and permeation experiments were carried out at 30, 40 and 50°C in pure water, ethanol (EtOH) and ethylacetate. In addition, the pervaporation separation of EtOH-water mixtures was conducted for 20-80 wt% water containing EtOH-water binary mixtures at 30, 40 and 50°C. It is observed that permeation rates increased and selectivity decreased with the increasing of temperature and the water content in the feed.

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Development of novel pervaporation membranes for the separation of water–isopropanol mixtures using sodium alginate and NaY zeolite

Cited by 84 publications

References 32 publications

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

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

Modification of tetraethylorthosilicate crosslinked poly(vinyl alcohol) membrane using chitosan and its application to the pervaporation separation of water–isopropanol mixtures

Sorption and pervaporation results of clinoptilolite filled poly(vinylalcohol) membrane prepared for dehydration of aqueous organic mixtures

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