Poly(vinyl alcohol) multilayer mixed matrix membranes for the dehydration of ethanol–water mixture

Guan, Huaimin; Chung, Tai‐Shung; Huang, Zhen; Chng, Mei Lin; Kulprathipanja, Santi

doi:10.1016/j.memsci.2005.05.032

Cited by 131 publications

(56 citation statements)

References 33 publications

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“…PVA-1 membrane decomposition occurs in two steps after water loss. [24] It starts to decompose at about 184°C and decomposes completely around 520°C. A lower starting temperature (around 180°C) and a longer decomposition temperature range (165-510°C) are observed for the PVA-2 membrane, as shown in Figure 3.…”

Section: Resultsmentioning

confidence: 99%

“…[16,24] However, PVA is chemically crosslinked to make it resistant to water as it has the poor stability and the large swelling capacity in aqueous solution. [25,26] Gao et al [27] used PVA membranes filled with KA, NaA, CaA and NaX zeolites (11 wt%).…”

Section: Introductionmentioning

confidence: 99%

“…[6] The selective layer was non-porous and very thin with a thickness of far less than 10 mm. Guan et al [24] worked with a PVA membrane containing 20 wt% zeolit KA. A separation factor of 963 with a flux of 507 g m À2 h…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

2013

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“…The discrepancy between the separation and selectivity plots, in our opinion, may be explained by two reasons: ① the membranes swollen which is caused by the plasticizing effect of water (water concentration ≥ 30% (mass)) and ② the membranes swollen which is induced by pH values increasing (CPL concentration ≥ 30%(mass)) as discussed earlier. Comparing fluxes with permeances, the separation factor with selectivity, it is proved that the permeance and selectivity can reflect the true membrane performance, while flux and separation factor parameters depend on not only intrinsic membrane properties but also on the experimental operating conditions [16] .…”

Section: Effect Of Feed Composition On Pervaporation Performancementioning

confidence: 99%

Swelling behaviors and pervaporation properties of CA/PAN composite membranes for separation of caprolactam/water mixtures

Zhang

Luo

Gaifeng

et al. 2010

Wuhan Univ. J. Nat. Sci.

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The composite membranes with cellulose acetate (CA) as the separating layer material and polyacrylonitrile (PAN) as the supporting layer material were prepared for separating caprolactam (CPL) from CPL/water mixtures by pervaporation technique. The swelling experiments were carried out to investigate the effects of swelling time and CPL concentration on the degree of swelling. The results showed that the CA membrane reached swelling equilibrium within 24 h, and the degree of swelling first slightly decreased then increased with the increase of CPL concentration in the feed under the experimental conditions. Respectively comparing flux with permeance, and separation factor with selectivity, we found out that the separation performance of the CA/PAN composite membrane is more strongly dependent on its hydrophilic/hydrophobic nature as well as on the effects of operating parameters, such as feed composition concentration and feed temperature.

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“…The behavior is consistent with the previous studies in the dehydration of aqueous organic mixture through hydrophilic polymeric membranes. 28,29 Results of the studies in the literature on the separation of ethanol-water mixtures are listed in Table II for comparison purposes. As can be seen from the Table II, the resulted membrane is a good PV membrane for the separation of ethanol-water mixtures.…”

Section: Effect Of Feed Concentrationmentioning

confidence: 99%

Preparation and characterization of CMCS/PVA blend membranes and its sorption and pervaporation performance (I)

Shen

Ruan

Gao³

2009

J of Applied Polymer Sci

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Novel pervaporation (PV) membranes for ethanol dehydration were prepared by blend poly(vinyl alcohol) (PVA) and carboxymethyl chitosan (CMCS), followed by the crosslinking reaction with glutaraldehyde; the structure and miscibility of the blend membranes were characterized by Fourier transform infrared, X-ray diffraction, and differential scanning calorimetry; the results indicated that the blends were miscible. The effect of feed concentration, operation temperature, crosslinking agent content, etc. on sorption performance and PV performance of the blend membrane is investigated. The membrane of CMCS/PVA blend ratio of 8 : 2 exhibited a high separation factor of 2959 with a reasonably high water flux value of 0.14 kg m À2 h À1 at the azeotropic feed composition (95 wt % of ethanol) at a temperature of 45 C.

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Poly(vinyl alcohol) multilayer mixed matrix membranes for the dehydration of ethanol–water mixture

Cited by 131 publications

References 33 publications

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

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

Swelling behaviors and pervaporation properties of CA/PAN composite membranes for separation of caprolactam/water mixtures

Preparation and characterization of CMCS/PVA blend membranes and its sorption and pervaporation performance (I)

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