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

被引：21

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.

引用

页码：295 / 302

页数：8

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