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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/19504

    Title: Resistance Analyses for Ultrafiltration in Tubular Membrane Module
    Authors: Cheng, Tung-wen;Yeh, Ho-ming;Gau, Chii-tzong
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: Ultrafiltration;Resistance in series;Gel polarization;Concentration polarization;Tubular;Fouling
    Date: 1997-10
    Issue Date: 2009-11-04 16:05:08 (UTC+8)
    Publisher: New York: Taylor & Francis Inc.
    Abstract: The resistance analyses for ultrafiltration of macromolecular solutions by the resistances-in-series model and the modified gel-polarization model, respectively, have been extended to the turbulent ultrafiltration system in this study. The experiments are carried out by ultrafiltrating dextran T500 solutions in a tubular membrane module with membrane material of ZrOz-TiOJcarbon. It is found that the permeate fluxes are predicted very well by these models for both laminar and turbulent systems, and the resistance caused by the concentration polarization/gel layer (R,) can be reduced by increasing the crossflow velocity on the membrane surface. Analysis by the resistances-in-series model showed that, R, decreases with flow velocity with exponents of 0.49 and 0.99 for the laminar system and the turbulent system, respectively.
    Relation: Separation Science and Technology 32(16), pp.2623-2640
    DOI: 10.1080/01496399708006960
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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