Pervaporation separation of ethyl acetate–ethanol binary mixtures using polydimethylsiloxane membranes

Hasanoğlu, Ayça; Salt, Yavuz; Keleşer, Sevinç; Özkan, Semra; Dinçer, Salih

doi:10.1016/j.cep.2004.06.001

Cited by 51 publications

(14 citation statements)

References 5 publications

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“…Nevertheless, the complexity of the separation steps is reduced: two binary streams (ethanol/acetal and ethanol/water) have to be separated instead of the quaternary mixture produced in a conventional reactor. The use of a pervaporation membrane process to separate ethanol from acetal 18,19 and ethanol from water 20,21 seems be feasible and will avoid formation of azeotropes. Moreover, for some applications there is no need to carry out ethanol/acetal separation.…”

Section: Figure 2 Simulated Moving-bed Reactormentioning

confidence: 99%

Novel process for diethylacetal synthesis

Silva

Rodrigues

2005

AIChE Journal

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Section: Figure 2 Simulated Moving-bed Reactormentioning

confidence: 99%

Novel process for diethylacetal synthesis

Silva

Rodrigues

2005

AIChE Journal

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“…In recent years, pervaporation (PV) has been proven to be a feasible technology with a number of potential advantages over conventional sulfur removal process from gasoline [1,2]. Polydimethylsiloxane (PDMS) is the most interesting and promising polymetric membrane materials and has been extensively investigated for the separation of different mixtures by PV [3,4].…”

Section: Introductionmentioning

confidence: 99%

Pervaporation separation of n-heptane/sulfur species mixtures with polydimethylsiloxane membranes

Zhao

et al. 2008

Separation and Purification Technology

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a b s t r a c tWith the mixtures of n-heptane and different sulfur species making up the model gasoline, polydimethylsiloxane (PDMS)/polyetherimide (PEI) composite membranes were prepared and used for sulfur removal from gasoline. Effects of sulfur species, feed sulfur content and feed temperature on the desulfurization efficiency were investigated for a series of binary n-heptane/sulfur species mixtures by pervaporation. Experimental results indicated that the change of feed sulfur content produced insignificant effect on sulfur enrichment factor for every sulfur species, while the partial fluxes of sulfur species were proportional to feed sulfur content. With the feed temperature increase, total flux increased for every binary mixture. Sulfur enrichment factor decreased in the following order at the same temperature: thiophene > 2-methylthiophene > 2,5-dimethylthiophene > n-butyl mercaptan > n-butyl sulfide. Correspondingly activation energy of permeation was also obtained. In order to simulate the desulfurization process of real gasoline, effect of more sulfur species coupling exist on separation efficiency was also investigated. With the increase of sulfur species number according to the decrease order of sulfur enrichment factor, total sulfur enrichment factor decreased while total flux was almost invariable.Crown

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“…The membrane used in this work was a cross-linked hydrophobic membrane, polydimethylsiloxane (PDMS) prepared in our labs [18]. The material used was given in the previous work [17].…”

Section: Methodsmentioning

confidence: 99%