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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/94984

    Title: The Effect of Recycle on Membrane Extraction in Parallel-Plate Modules
    Authors: Yeh, H. M.;Chen, C. S.;Peng, Y. Y.
    Contributors: 淡江大學化學工程學系
    Keywords: 平行板;薄膜萃取;質量傳遞;再循環;Parallel Plate;Membrane Extraction;Mass Transfer;Recycle
    Date: 1999-11
    Issue Date: 2014-02-09 00:52:04 (UTC+8)
    Abstract: The reflux indeed has much influence on the heat and mass transfer, which in turn plays a significant role on the design, calculation, and operation of the equipment. The effects of recycle on membrane extraction through a double-pass parallel-plate channel have been studied both theoretically and experimentally. Theoretical analysis of mass transfer in multipass membrane extractors was analogous to heat transfer in multipass heat exchangers. Experiments were carried out with the use of a membrane sheet made of microporous polypropylene coated with polytetrafluoroethylene as a permeable barrier to extract acetic acid from aqueous solution by methyl isobutyl ketone. Theoretical predictions are in qualitative agreement with the experimental results. Constrast to a single-pass parallel-plate membrane channel without recycle, considerable improvement in mass transfer is obtainable if membrane extraction is operated in a double-pass device of same size with recycle which provides the increase of fluid velocity and pre-extraction (or pre-mixing) effect. It is found that recycle can enhance mass transfer, especially for operations with higher inlet volume rate or shorter conduit length.
    Relation: 八十八年度化工學會年會及研討會專輯─輸送現象及其應用研討會論文集
    Appears in Collections:[化學工程與材料工程學系暨研究所] 會議論文

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