English  |  正體中文  |  简体中文  |  Items with full text/Total items : 52359/87459 (60%)
Visitors : 9139844      Online Users : 225
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/87913

    Title: 多行程逆流式回流薄膜萃取器中質量傳送之改良型修正因子分析
    Other Titles: Modified correction-factor analysis on membrane extraction in multipass countercurrent-flow external-recycle rectangular modules
    Authors: 楊長智;Yang, Chang-Chih
    Contributors: 淡江大學化學工程與材料工程學系碩士班
    葉和明;Yeh, Ho-Ming
    Keywords: 薄膜萃取;多行程系統;逆流式;改良型修正因子分析;質量傳送;Membrane extraction;multipass operation;Countercurrent flow;modified correction-factor analysis;mass transfer
    Date: 2012
    Issue Date: 2013-04-13 11:51:46 (UTC+8)
    Abstract: 本論文主要推導回流型逆流多行程薄膜萃取器中之質量傳送的改良型修正因子方程式,以及探討行程數與回流比對萃取效率的影響。由於薄膜萃取器的質傳理論可類比熱交換器的熱傳理論,因此本文利用熱交換器之理論為基礎架構來進行質傳系統的理論推導。所討論內容包括單行程、雙行程、三行程及四行程之具有回流的萃取系統,利用質傳面積、體積流率、分配係數、回流比、整體質量傳送係數等參數,便可繪製出方便使用的改良型修正因子圖表,並配合本文中改良後的質傳公式,即可快速求出萃取速率,因此,可不必使用傳統型修正因子中繁雜的疊代法,大大增加使用上的便利性。此外,本文也提供雙行程、三行程之理論值與實驗點的比較來證明理論公式的正縮性。雖然增加行程數與回流比可提升質傳效果,但也提高操作能量的損耗。然而經過計算後發現:能量損耗率雖隨著回流比與行程數的加大而劇增,但在本實驗系統之能量損耗值還是很小,因此藉增加行程數與回流比來提高萃取速率,不愧是一可行的改良型設計方法。
    In present study the modified correction-factor analysis is introduced to develop the mass-transfer theory in multipass countercurrent-flow recycled membrane extractors, in which the unknown solute outlet concentrations are neither in the estimating equation for mass-transfer rate nor in the modified correction-factor charts, and thus the calculation is easy and direct without using the try-and-error method, which should be employed in the conventional correction-factor analysis. Experimental results confirm the prediction values for the extraction of acetic acid from aqueous solution by methyl isobutyl ketone in the double-pass device.
    Appears in Collections:[化學工程與材料工程學系暨研究所] 學位論文

    Files in This Item:

    File SizeFormat

    All items in 機構典藏 are protected by copyright, with all rights reserved.

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