NATURAL-CONVECTION MASS-TRANSFER AT A FIXED-BED OF CYLINDERS

被引:6
作者
SEDAHMED, GH
ZAHRAN, RR
HASSAN, I
机构
[1] Chemical Engineering Department, Alexandria University, Alexandria
[2] Chemical Engineering Department, Qatar University, Doha
关键词
D O I
10.1021/ie00018a032
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The free-convection mass-transfer behavior of fixed beds of randomly packed cylinders (aspect ratio = 1) has been investigated experimentally using an electrochemical technique involving the measurement of the limiting current for the cathodic deposition of copper from acidified copper sulfate solutions. Variables studied were physical properties of the solution, cylinder diameter, and bed height. The data were correlated for the ranges 0.17 x 10(8) < Sc X Gr < 0.23 X 10(10), 0.256 < d/h < 1, and 1700 < Sc < 2150 by the equation Sh = 0.31(Sc x Gr)0.32(d/h)0.12. The height effect was explained in terms of the presence of two opposing effects in the bed, namely, a concentration field and a velocity field.
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收藏
页码:1235 / 1238
页数:4
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