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    题名: Effect of external recycle and double-pass barrier locationon membrane extraction in cross-flow modules
    作者: 葉和明
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: Cross flow;double-pass;external reflux;free barrier-location;membrane extraction
    日期: 2009-01-01
    上传时间: 2011-10-24 01:50:49 (UTC+8)
    摘要: The dispersion free membrane extraction through a cross-flow rectangular membrane module with arbitrary location of an impermeable plate placed for double-pass and external-recycle operations in raffinate phase, has been investigated. Theoretical treatment was analogous to the heat transfer in heat exchangers for the mass transfer in mass exchangers. An experiment was carried out in a cross-flow conduit of stainless steel inserted with a membrane sheet made of microporous polypropylene to extract acetic acid from aqueous solution by methyl iso-butyl ketone. Theoretical predictions are in agreement with the experimental results. Considerable improvement in mass-transfer performance is obtainable if the width of the first-pass subchannel, ΔB decreases, as well as the width of the second-pass subchannel, (1−Δ)B increases. The mass-transfer rate increases also when the reflux ratio increases. Based on the economic point of view, the suitable value of Δ (B is the width of a membrane sheet) may be 0.2.
    關聯: Sep. Sci. and Technol. 44(2), pp.447-465
    DOI: 10.1080/01496390802589980
    显示于类别:[化學工程與材料工程學系暨研究所] 期刊論文





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