教師資料查詢 | 類別: 期刊論文 | 教師: 黃國楨 Hwang, Kuo-Jen (瀏覽個人網頁)

標題:Cross-Flow Microfiltration of Dilute Macromolecular Suspension
學年98
學期1
出版(發表)日期2009/08/01
作品名稱Cross-Flow Microfiltration of Dilute Macromolecular Suspension
作品名稱(其他語言)
著者Hwang, Kuo-Jen; Huang, Pei-Sun
單位淡江大學化學工程與材料工程學系
出版者Kidlington: Pergamon
著錄名稱、卷期、頁數Separation and Purification Technology 68(3), pp.328-334
摘要The operating condition effects on the cross-flow microfiltration performance of dilute macromolecular suspension were studied. Track-etched membranes of different pore sizes were used to filter blue dextran with a molecular weight of 2000 kDa. Increasing the membrane pore diameter results in higher filtration flux but decreases the dextran rejection coefficient. For filtration using 0.2-μm membrane, an increase in cross-flow velocity or filtration pressure leads to higher filtration flux, but the impact of cross-flow velocity is more significant. A membrane fouling model based on force analysis and membrane pore size reduction caused by dextran adsorption at pseudo-steady state is proposed. The effective membrane pore diameter and pseudo-steady filtration flux under various conditions can then be estimated. On the other hand, the pseudo-steady dextran rejection coefficient increases with increasing cross-flow velocity or decreasing filtration pressure when cross-flow velocity is lower than 0.3 m/s. This can be reasonably explained by the sweeping effect of tangential flow or using the modified gel-polarization model. However, a contrary trend occurs under the conditions with higher cross-flow velocity. This result is attributed to the dextran molecular deformation. The “coil-stretched” deformation of blue dextran molecules can be indicated using the Reynolds number in the permeating flow direction or Deborah number for macromolecular flow through porous media.
關鍵字Cross-flow microfiltration; Rejection coefficient; Membrane fouling; Dextran; Membrane filtration
語言英文
ISSN1383-5866
期刊性質國外
收錄於SCI
產學合作
通訊作者Hwang, Kuo-Jen
審稿制度
國別英國
公開徵稿
出版型式紙本
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