Polymeric membrane pervaporation

Shao, Pinghai; Huang, Robert Y. M.

doi:10.1016/j.memsci.2006.10.043

Cited by 768 publications

(361 citation statements)

References 130 publications

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“…The membrane is a barrier between the two phases, the liquid phase -feed, and the vapour phase -permeate. There are different types of membranes used for pervaporation including polymeric, ceramic and composite membranes (Chapman et al, 2008;Liu et al, 2007;Shao et al, 2007). However, due to an excellent chemical resistance and thermal stability, ceramic membranes are of the interest in recent years.…”

Section: Fig 1 Chemistry Of Diethyl Tartrate Synthesismentioning

confidence: 99%

Pervaporation applied for dewatering of reaction mixture during esterification

Krasiński

Wierzba

Grudzień

et al. 2016

Chemical and Process Engineering

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In this work the esterification of diethyl tartrate was studied. The research was focused on the enhancement of reversible reaction yield, which is accomplished by dewatering of the reaction mixture. The removal of water shifts the equilibrium towards the main product. Pervaporation was applied for this purpose, and results were compared to distillation. The advantages and limitations of both processes are discussed. The experimental part consists of dewatering of mixture after the reaction had reached the equilibrium, and was subsequently fed to the test rig equipped with a single zeolite membrane purchased from Pervatech B.V. Results show a significant conversion increase as a result of water removal by pervaporation. Compared to distillation no addition of organics is necessary to efficiently remove water above the azeotrope. Nevertheless, some limitations and issues which call for optimisation are pointed out. A simple numerical model is proposed to support design and sizing of the pervaporation system. Various modes of integrated system operation are also briefly discussed.

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Section: Fig 1 Chemistry Of Diethyl Tartrate Synthesismentioning

confidence: 99%

Pervaporation applied for dewatering of reaction mixture during esterification

Krasiński

Wierzba

Grudzień

et al. 2016

Chemical and Process Engineering

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“…These materials must be inert to biological attack, insoluble in the growth media and non-toxic to microbial cells, hence polymeric supports are proper choices, sorption capacity, chemical resistance and mechanical strength of polymer support and solubility parameter is the main factor in the selection of a polymer support [29][30][31]. However, few studies have evaluated the influence of inorganic supports on the BDS activity and using polymers as the support for bacterial strain for BDS never have been observed [32,33].…”

Section: Introductionmentioning

confidence: 99%

Biodesulphurization of thiophene as a sulphur model compound in crude oils by Pseudomonas aeruginosa supported on polyethylene

Karimi

Sadeghi

Salimi

2017

Ecological Chemistry and Engineering S

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Abstract:A new biodesulphurization method has been considered using Pseudomonas aeruginosa supported on polyethylene (PE) for biodesulphurization (BDS) of thiophene as an aromatic sulphur model compound of crude oils. Also the biodegradation of thiophene has been modified in the presence of potassium hexacyanoferrate(III) as a terminal electron acceptor to approach the maximum biodesulphurization efficiency. The obtaining results according to UV-Spectrophotometry at 240 nm, 83.3% of thiophene at the primary concentration of 50 mg/dm 3 , pH = 7, by 0.5 g of biocatalyst in 37°C after 4 h of contact time has been removed. The bacterial cells exhibited a greater and faster biodegradation in the presence of potassium hexacyanoferrate(III) and 94.8% of thiophene has been removed after 3 h of contact time. Kinetic study predicted chemisorption of thiophene on the surface of the biocatalyst, as it followed the pseudo-second-order rate equation. Morphology and surface functional groups of the biocatalyst have been investigated by SEM and FT-IR, respectively.

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“…Symmetrical membranes can be porous or dense, and the morphology remains the same across the cross-section. Asymmetric membranes have a reasonably dense thin surface layer supported on a porous membrane [11,12]. The surface layer is the layer in which the pervaporation separation is performed, and also the surface layer is the principal barriers for the flow through the membrane [13,14].…”

Section: Introductionmentioning

confidence: 99%

Pervaporation of methanol from methylacetate mixture using polyamide-6 membrane

Abdallah¹,

El–Gendi²,

El-Zanati³

et al. 2013

Desalination and Water Treatment

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A B S T R A C TThis article presents the results concerning the preparation of asymmetric polyamide-6 (PA-6) membrane using the wet phase inversion technique. The membrane was prepared from a casting dope containing 20 wt.% of PA-6 in formic acid at 18˚C. The membrane was then characterized by scanning electron microscopy and further tested for the separation of methanol/methyl acetate solutions by pervaporation. The effects of feed methanol concentration, operating temperature and the feed liquid flow rate on the membrane performance were investigated. The permeation flux increased with increasing feed methanol concentration, feed temperature, and feed flow rate. Some typical data of separation factor were: at the operating temperature of 40˚C, feed 80% methanol/20% methyl acetate and the feed liquid flow rate of 16.5, 20.6 mL/s, the separation factor was 50 and 83 respectively.

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Polymeric membrane pervaporation

Cited by 768 publications

References 130 publications

Pervaporation applied for dewatering of reaction mixture during esterification

Pervaporation applied for dewatering of reaction mixture during esterification

Biodesulphurization of thiophene as a sulphur model compound in crude oils by Pseudomonas aeruginosa supported on polyethylene

Pervaporation of methanol from methylacetate mixture using polyamide-6 membrane

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