Permeation of methanol/methyl-t-butyl ether mixtures through poly(ethylene-co-vinyl acetate) films

Gozzelino, Giuseppe; Malucelli, Giulio

doi:10.1016/j.colsurfa.2004.01.004

Cited by 23 publications

(10 citation statements)

References 19 publications

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“…Pervaporation of ethyl acetate from aqueous solution [11,12], methanol/MTBE [9], benzene/cyclohexane separation [13,14], and methyl substituted benzenes [10], are some of the major accomplished efforts.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Preparation and characterization of acrylonitrile–butadiene–styrene/poly(vinyl acetate) membrane for CO2 removal

Sanaeepur

Amooghin

Moghadassi

et al. 2011

Separation and Purification Technology

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Section: Introductionmentioning

confidence: 99%

“…As a well-known example, copolymerization of PVAc with polyethylene forms ethylene vinyl acetate (EVA). Because of its mechanical properties, chemical resistance, flexibility and processability, the EVA is applied extensively in engineering and industrial fields [9,10].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of acrylonitrile–butadiene–styrene/poly(vinyl acetate) membrane for CO2 removal

Sanaeepur

Amooghin

Moghadassi

et al. 2011

Separation and Purification Technology

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“…In comparison to the zeolite membranes, they are easy to fabricate and therefore more economic 5. Hydrophilic polymeric membranes are widely used in PV for separation of azeotropic mixtures and dehydration of alcohols and other organics in various industrial processes 6–8. Among different polymeric materials, poly (vinyl alcohol) (PVA) is a suitable and attractive polymer for making hydrophilic membranes.…”

Section: Introductionmentioning

confidence: 99%

Effect of cross‐linking time on the thermal and mechanical properties and pervaporation performance of poly(vinyl alcohol) membrane cross‐linked with fumaric acid used for dehydration of isopropanol

Heydari¹,

Moheb²,

Ghiaci³

et al. 2012

J of Applied Polymer Sci

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Cross-linked poly (vinyl alcohol) membranes were prepared using fumaric acid as the cross-linking agent and were used for the pervaporation separation of water/isopropanol mixtures. Cross-linking process was carried out at 150 C at three different times of 10, 30, and 60 min. The membranes were characterized by different known methods of FT-IR, TGA, XRD as well as tensile test. The effects of cross-linking time on the thermal and mechanical properties of the membranes and also their pervaporation performance were investigated. Formation of more ester groups by increasing the cross-linking time was confirmed by the FT-IR results. TGA analyses showed that thermal stability of the membranes is improved by prolonging the duration of cross-linking process. This was due to the formation of more compact structure in the membranes. The XRD results revealed that the crystalline regions of the membranes were relatively diminished with an increase in the cross-linking time. No specific trend was observed for the variation of tensile strength at break with the cross-linking time. The PVA membrane cross-linked for 60 min showed high selectivity of 1492 for water permeation for the feed mixture containing 10 wt % water. The temperature dependency of the permeation flux was investigated using Arrhenius relationship, and the activation energy values were calculated for total permeation (E p ), water (E pw ), and IPA (E pIPA ) fluxes. Lower value of E pw in comparison with E pIPA supported excellent dehydration performance of the cross-linked membranes. Despite large increase in activation energy of water with prolonged cross-linking time, the selectivity was improved.

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“…In addition, as the magnitude of activation energy indicates the level of dependence of a membrane flux on temperature , one can conclude that the flux through the membrane containing 0.5 wt% of LiBr shows the lowest dependence on temperature. This is because, as discussed in the section dedicated to the DSC analysis results, the crystallinity in membrane containing 0.5 wt% of LiBr is lower than those of homogeneous membrane and the membrane containing LiBr at 1 wt%.…”

Section: Resultsmentioning

confidence: 99%

Pervaporation separation of water–isopropyl alcohol mixture by PVA/LiBr membrane

Ebrahimian

Sadeghi

Moheb

et al. 2018

Polymer Engineering & Sci

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Hydrophilic polyvinyl alcohol membranes, modified by lithium bromide, were prepared with glutaraldehyde as a crosslinking reagent. The membranes were investigated for the pervaporation dehydration of a water–isopropyl systems. The effect of the feed temperature on permeation flux and membrane selectivity was studied. The characterization of modified membranes was performed using Fourier transform infrared spectroscopy (FT‐IR), differential scanning calorimeter (DSC) and X‐ray diffraction. It was observed that the crystallinity of membranes increased as lithium bromide was added to the polymer. High performance liquid chromatography (HPLC) was used to analyze water content and isopropyl alcohol in the feed and permeate samples The pervaporation tests also confirmed an enhancement in water permeability through adding LiBr to the polymer, because of the high hydrophilic properties of this salt. According to pervaporation experiments conducted at 50°C, the water flux increased from 0.1049 kg/ m2 hr to 0.1114 kg/ m2 hr as 0.5 wt% of LiBr was added to the polymer matrix. Furthermore, an addition of 1 wt% of LiBr compared to homogeneous PVA membrane increased selectivity from 76 to 779. POLYM. ENG. SCI., 59:E101–E111, 2019. © 2018 Society of Plastics Engineers

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Permeation of methanol/methyl-t-butyl ether mixtures through poly(ethylene-co-vinyl acetate) films

Cited by 23 publications

References 19 publications

Preparation and characterization of acrylonitrile–butadiene–styrene/poly(vinyl acetate) membrane for CO2 removal

Preparation and characterization of acrylonitrile–butadiene–styrene/poly(vinyl acetate) membrane for CO2 removal

Effect of cross‐linking time on the thermal and mechanical properties and pervaporation performance of poly(vinyl alcohol) membrane cross‐linked with fumaric acid used for dehydration of isopropanol

Pervaporation separation of water–isopropyl alcohol mixture by PVA/LiBr membrane

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