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    題名: Resistance Analyses for Ultrafiltration in Tubular Membrane Module
    作者: Cheng, Tung-wen;Yeh, Ho-ming;Gau, Chii-tzong
    貢獻者: 淡江大學化學工程與材料工程學系
    關鍵詞: Ultrafiltration;Resistance in series;Gel polarization;Concentration polarization;Tubular;Fouling
    日期: 1997-10
    上傳時間: 2009-11-04 16:05:08 (UTC+8)
    出版者: New York: Taylor & Francis Inc.
    摘要: 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.
    關聯: Separation Science and Technology 32(16), pp.2623-2640
    DOI: 10.1080/01496399708006960
    顯示於類別:[化學工程與材料工程學系暨研究所] 期刊論文

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