English  |  正體中文  |  简体中文  |  全文筆數/總筆數 : 56826/90592 (63%)
造訪人次 : 12111923      線上人數 : 61
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
搜尋範圍 查詢小技巧:
  • 您可在西文檢索詞彙前後加上"雙引號",以獲取較精準的檢索結果
  • 若欲以作者姓名搜尋,建議至進階搜尋限定作者欄位,可獲得較完整資料
  • 進階搜尋
    請使用永久網址來引用或連結此文件: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/71872

    題名: Effect of external recycle and double-pass barrier locationon membrane extraction in cross-flow modules
    作者: 葉和明
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: Cross flow;double-pass;external reflux;free barrier-location;membrane extraction
    日期: 2009-01-01
    上傳時間: 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
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文





    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - 回饋