TRANSPORT PHENOMENA IN ULTRAFILTRATION - MEMBRANE SELECTIVITY AND BOUNDARY-LAYER PHENOMENA

被引:26
作者
JONSSON, G
机构
[1] Technical Univ of Denmark, Lyngby, Den, Technical Univ of Denmark, Lyngby, Den
关键词
FLOW OF FLUIDS - Boundary Layer - MEMBRANES - Mass Transfer;
D O I
10.1351/pac198658121647
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Retention characteristics of UF membranes are delineated through comparison of the combined viscous flow and frictional model with the Ferry-Faxen equation. The molecular weight cut-off concept is discussed using calculations of how sharp cut-off curves one can expect of UF membranes with uniform pore sizes and how heteroporosity will affect such curves. Experimental retention-flux curves for different macromolecules have been measured. From these data the molecular weight cut-off curves at varying pressure levels can be determined and by comparing with the model an average pore radius can be calculated.
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页码:1647 / &
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