Separation of dimethylformamide/water mixtures through sodium alginate and sodium alginate/clinoptilolite composite membranes by vapor permeation with and without feed-membrane temperature difference

Kahya, Suat; Şanlı, Oya

doi:10.1080/19443994.2013.803653

Cited by 6 publications

(4 citation statements)

References 36 publications

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“…due to its high biocompatibility, solubility in water, low toxicity, ability to form stable aqueous hydrogels, and film-forming properties. Sodium alginate is also actively applied in membrane technology as a polyelectrolyte [6][7][8] and for the preparation of membranes for fuel cell applications [9], vapor permeation [10][11][12], nanofiltration [13,14], ultrafiltration [15], and pervaporation [16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

et al. 2020

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Novel mixed matrix dense and supported membranes based on biopolymer sodium alginate (SA) modified by fullerenol were developed. Two kinds of SA–fullerenol membranes were investigated: untreated and cross-linked by immersing the dry membranes in 1.25 wt % calcium chloride (CaCl2) in water for 10 min. The structural and physicochemical characteristics features of the SA–fullerenol composite were investigated by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopic methods, scanning electron (SEM) and atomic force (AFM) microscopies, thermogravimetric analysis (TGA), and swelling experiments. Transport properties were evaluated in pervaporation dehydration of isopropanol in a wide concentration range. It was found that the developed supported cross-linked SA-5/PANCaCl2 membrane (modified by 5 wt % fullerenol) possessed the best transport properties (the highest permeation fluxes 0.64–2.9 kg/(m2 h) and separation factors 26–73,326) for the pervaporation separation of the water–isopropanol mixture in the wide concentration range (12–90 wt % water) at 22 °C and is suitable for the promising application in industry.

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Section: Introductionmentioning

confidence: 99%

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

et al. 2020

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“…Bu çalışmada paralel sonuçlar elde edilmiştir. [16,19,20] göre en yüksek akı değerine ulaşılmıştır (3,266 kg/m 2 sa), geçiş aktivasyon enerjisi P-3 membran için 3,720 kcal/mol (saf NaAlg 6.750…”

Section: B Pervaporasyonda Besleme çöZeltisi Derişiminin Seçicilik Ve...unclassified

Polimerik Membranlarda Zeolit Kullanımının Pervaporasyon Performansı Üzerine Etkisinin İncelenmesi

Kahya

2022

Bilecik Şeyh Edebali Üniversitesi Fen Bilimleri Dergisi

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Bu çalışmada, pervaporasyon yöntemiyle dimetilformamit/su karışımının ayrılması amacıyla sodyum aljinat/poli (vinil alkol)/klinoptilolit kompozit membran elde edilmiştir. Çapraz bağlı membranlar, (FTIR), diferansiyel taramalı kalorimetre (DSC), termal gravimetrik analiz (TGA) ve taramalı elektron mikroskobu (SEM) cihazları ile karakterize edilmiştir. Akı değeri (3,266 kg/m2 sa) yüksek bulunmasına karşın, seçicilik için arzulanan sonuca ulaşılamamıştır. Ağırlıkça % 20 DMF çözeltisi için aktivasyon enerjisi 3,720 kcal/mol olarak ölçülmüştür. Zeolit ilavesinin membran performansına etkisi araştırılmıştır.

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“…This work addresses the development of novel high-performance membranes based on sodium alginate (SA) and hydroxyethyl cellulose (HEC) blend for pervaporation dehydration of isopropanol. SA is a natural polysaccharide extracted from seaweed, which is actively applied in medical [ 36 , 37 ], paper, cosmetic, and food industries [ 38 ], and as a membrane material in various membrane processes [ 39 , 40 , 41 , 42 , 43 , 44 , 45 ], especially, in pervaporation for dehydration of organic solvents [ 46 , 47 , 48 , 49 , 50 ]. Hydroxyethyl cellulose (HEC) is a carbohydrate polymer, namely, water-soluble cellulose ether with high compatibility with various water-soluble polymers [ 51 , 52 , 53 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Membranes Based on Hydroxyethyl Cellulose/Sodium Alginate for Pervaporation Dehydration of Isopropanol

et al. 2021

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Membrane methods, especially pervaporation, are quickly growing up. In line with that, effective membrane materials based on biopolymers are required for the industrially significant mixtures separation. To essentially improve membrane transport characteristics, the application of the surface or/and bulk modifications can be carried out. In the present study, novel dense and supported membranes based on hydroxyethyl cellulose (HEC)/sodium alginate (SA) were developed for pervaporation dehydration of isopropanol using several approaches: (1) the selection of the optimal ratio of polymers, (2) the introduction of fullerenol in blend polymer matrix, (3) the selection of the optimal cross-linking agent for the membranes, (4) the application of layer-by-layer deposition of polyelectrolytes on supported membrane surface (poly(sodium 4-styrenesulfonate) (PSS)/poly(allylamine hydrochloride) (PAH) and PSS/SA). Structural and physicochemical characteristics of the membranes were analyzed by different methods. A cross-linked supported membrane based on HEC/SA/fullerenol (5%) composite possessed the following transport characteristics in pervaporation dehydration of isopropanol (12–50 wt.% water): 0.42–1.72 kg/(m2h) permeation flux, and 77.8–99.99 wt.% water content in the permeate. The surface modification of this membrane with 5 bilayers of PSS/PAH and PSS/SA resulted in the increase of permeation flux up to 0.47–3.0 and 0.46–1.9 kg/(m2h), respectively, with lower selectivity.

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Separation of dimethylformamide/water mixtures through sodium alginate and sodium alginate/clinoptilolite composite membranes by vapor permeation with and without feed-membrane temperature difference

Cited by 6 publications

References 36 publications

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

Polimerik Membranlarda Zeolit Kullanımının Pervaporasyon Performansı Üzerine Etkisinin İncelenmesi

Novel Membranes Based on Hydroxyethyl Cellulose/Sodium Alginate for Pervaporation Dehydration of Isopropanol

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