Urea release rate from a scoop of coated pure urea beads: Unified extreme analysis

被引：20
|
作者：
Lu, S. M. [1 ]
Chang, Szu-Lin [1 ]
Ku, Wen-Yu [1 ]
Chang, Hou-Chien [1 ]
Wang, Jiunn-Yau [1 ]
Lee, Duu-Jong [1 ]
机构：
[1] Natl Taiwan Univ, Dept Chem Engn, Taipei 10617, Taiwan
来源：
JOURNAL OF THE CHINESE INSTITUTE OF CHEMICAL ENGINEERS | 2007年 / 38卷 / 3-4期
关键词：
controlled release; analysis; experiment; spray coated urea beads;
D O I：
10.1016/j.jcice.2007.04.001
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Urea release from a scoop of coated beads in a given volume of a well stirred liquid has been investigated analytically and experimentally. A method for determining the fractional cumulative release and fractional release rate curves for the scoop without knowing particle number and radii is presented. The representative D/K-b for a scoop of urea beads spray coated with ethyl cellulose is near 3.5 x 10(-8) cm(2)/s, and that with cellulose acetate phthalate is near 7 x 10(-8) cm(2)/s. (C) 2007 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
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页码：295 / 302
页数：8
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