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Pervaporation separation of a water-ethanol mixture by PSF-PEG membrane

机译:PSF-PEG膜对水-乙醇混合物的全蒸发分离

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摘要

For dehydrating a water-ethanol mixture by pervaporation, a polysulfone-And poly(ethylene glycol)(PSF-PEG) membrane was prepared. The separation performance of water and ethanol was found to strongly depend on the diffusion selectivity of permeates. On the other hand, the solubility selectivity of water to ethanol showed only minor change with an increasing PEG composition of the PSF-PEG membrane. This study found that the PEG content in a FSF-PEG membrane showed mobility enhancement of pervaporation properties and that the diffusion difference of Permeates increased with increasing PEG content The effect of PEG content on separation performance was a result of the improvement of the permeate diffusion properties of the PSF/PEG membrane. The diffusion difference in the membrane, not the solubility of water-ethanol in the membrane, was the dominant factor for the separation. Suitable PEG content in PSF/PEG membranes can prepare a high-performance pervaporation membrane. (C) 2003 Wiley Periodicals, Inc. [References: 15]
机译:为了通过全蒸发使水-乙醇混合物脱水,制备了聚砜-和聚(乙二醇)(PSF-PEG)膜。发现水和乙醇的分离性能在很大程度上取决于渗透物的扩散选择性。另一方面,随着PSF-PEG膜的PEG组成的增加,水对乙醇的溶解度选择性仅显示出很小的变化。这项研究发现FSF-PEG膜中的PEG含量显示出渗透性的迁移率提高,并且渗透物的扩散差异随PEG含量的增加而增加.PEG含量对分离性能的影响是渗透物扩散性能改善的结果PSF / PEG膜的表面。膜中的扩散差异而不是水-乙醇在膜中的溶解度是分离的主要因素。 PSF / PEG膜中合适的PEG含量可以制备出高性能的全蒸发膜。 (C)2003 Wiley Periodicals,Inc. [参考:15]

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