Pervaporation dehydration of aqueous ethanol solution using H-ZSM-5 filled chitosan membranes

Sun, Honglei; Lu, Lianyu; Xue, Chen; Jiang, Zhongyi

doi:10.1016/j.seppur.2007.09.012

Cited by 67 publications

(28 citation statements)

References 29 publications

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“…It is well known that ethanol dehydration is a difficult task due to the formation of ethanol/water azeotrope in the process of ethanol fermentation production [14,15]. Furthermore, the prevailing industrial technologies such as azeotropic distillation and extractive distillation are all energy-intensive processes and need auxiliary agents.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the prevailing industrial technologies such as azeotropic distillation and extractive distillation are all energy-intensive processes and need auxiliary agents. By contrast, pervaporation, due to its distinct advantages including low-energy cost, environmental benignity and unrestraint of vaporliquid equilibrium, is considered as a promising alternative [14,15]. Poly(vinyl alcohol)(PVA) as a favorable hydrophilic polymer shows a better separation factor for alcohol/H 2 O pervaporation separation process, but shows a relatively low permeation flux [16,17].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of PFSA/PSf hollow fiber composite membranes with recovered PFSA for the pervaporation separation of EtOH/H2O

Lang

Tong

et al. 2010

Sci. China Chem.

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Perfluorosulfonic acid/Polysulfone(PFSA/PSf) hollow fiber composite membranes have been prepared by dip-coating method using PSf ultrafiltration (UF) membrane as substrate with recovered PFSA. The composite membranes were applied to the pervaporation separation of 95% ethanol (EtOH)/H 2 O mixture. SEM images show that the thickness of the PFSA skin layer of the composite membranes is about 2 μm, much thinner than those of other PFSA composite membranes revealed in the literatures. Effects of annealing temperature, coating solution concentration and counter-ions of PFSA on the pervaporation performances of the composite membranes were investigated. The total flux decreases and separation factor increases with the increase of annealing temperature. The highest permeation flux of 3230 g m −2 h −1 and a separation factor of 5.4 is obtained for the composite membrane annealed at 80°C. The lowest permeation flux of 396 g m −2 h −1 and a separation factor of 27.7 is obtained for the composite membrane annealed at 160°C. The permeation performances of the PFSA/PSf composite membrane are evidently influenced by the counter-ions of PFSA. The flux sequence of the PFSA/PSf composite membranes with different counter-ions is H + >Li + >Ca 2+ >Mg 2+ >Na + >K + >Ba 2+ >Fe 3+ >Al 3+ , and the separation factor sequence is H +

Na + >K + . There are very little variations of ΔE app values between the composite membranes with three divalent counter-ions (Mg 2+ , Ca 2+ and Ba 2+ ), and the ΔE app values of the composite membranes with two trivalent counter-ions (Fe 3+ and Al 3+ ) are relatively high. pervaporation, hollow fiber composite membrane, perfluorslulfonic acid (PFSA), ethanol (EtOH)/H 2 O mixture

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of PFSA/PSf hollow fiber composite membranes with recovered PFSA for the pervaporation separation of EtOH/H2O

Lang

Tong

et al. 2010

Sci. China Chem.

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“…As indicated earlier , higher concentration of H‐ZSM5 in chitosan (CS) matrix showed an increase in separation factor up to a saturation point, but further increase of zeolite content decreased the membrane performance due to the agglomeration of zeolite particles filling the pores of the membrane, thus reducing the sieving effect. In this work, an optimum of 7 wt% H‐ZSM5 loading into the PVA matrix appears to be appropriate to induce high selectivity to water.…”

Section: Resultsmentioning

confidence: 82%

Mixed matrix membranes of H‐ZSM5‐loaded poly(vinyl alcohol) used in pervaporation dehydration of alcohols: Influence of silica/alumina ratio

Suhas

Aminabhavi

Raghu

2013

Polymer Engineering & Sci

110

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Mixed matrix membranes of poly(vinyl alcohol) loaded with zeolite particles having different silica alumina ratio were prepared and used in the pervaporation dehydration of ethanol and isopropanol (IPA) from their aqueous mixtures. The membranes were characterized by physicochemical techniques that revealed higher interaction between polymer and zeolite particles having higher alumina than those with lower alumina in the zeolite framework. Both, membrane selectivity to water and flux were increased as the alumina content in the zeolite increases. Separation factors of zeolite with lower alumina incorporated membranes were, respectively, 236 and 334 for the feed mixture compositions of 4 wt% water in ethanol and 10 wt% water in IPA at 30 C. On the other hand, membranes containing zeolites with higher alumina content showed slightly higher separation factors of 349 and 568, respectively, for the same feed mixtures at 30 C. Such an incremental improvement in membrane performance with increase in alumina content in the zeolite framework is attributed to favorable interaction between zeolite particles and the polymer matrix.

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“…Cs/zeolite biocomposites. Hydrophilic zeolite (ZE) filled Cs composite membrane was prepared as a filter membrane (Table 4) [143,144]. The membrane was used in the pervaporation process of producing ethanol solutions.…”

Section: Cs/mineral Biocompositesmentioning

confidence: 99%

Preparation, Properties and Applications of Chitosan-Based Biocomposites/Blend Materials: A Review

Julkapli

Akil

Ahmad

2011

Composite Interfaces

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Pervaporation dehydration of aqueous ethanol solution using H-ZSM-5 filled chitosan membranes

Cited by 67 publications

References 29 publications

Preparation of PFSA/PSf hollow fiber composite membranes with recovered PFSA for the pervaporation separation of EtOH/H2O

Preparation of PFSA/PSf hollow fiber composite membranes with recovered PFSA for the pervaporation separation of EtOH/H2O

Mixed matrix membranes of H‐ZSM5‐loaded poly(vinyl alcohol) used in pervaporation dehydration of alcohols: Influence of silica/alumina ratio

Preparation, Properties and Applications of Chitosan-Based Biocomposites/Blend Materials: A Review

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