MATHEMATICAL RELATIONSHIP BETWEEN DESORPTION AND SORPTION SOLUTIONS

被引:4
作者
LIU, JY
机构
[1] U.S. Department of Agriculture, Forest Service, Forest Products Laboratory, Madison, WI
关键词
CONCENTRATION OF DIFFUSING SUBSTANCE; DIFFUSION COEFFICIENT; DIFFUSION EQUATION; SURFACE EMISSION COEFFICIENT;
D O I
10.1080/07373939308916878
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
This paper presents a theoretical equation relating the dimensionless times of Newman's solutions of the diffusion equation for desorption and sorption. The derived equation provides a theoretical proof of the linear relationship between dimensionless time and the inverse of transport ratio for a given fraction of diffusing substance as observed numerically in the literature. Following the same approach proposed earlier by the writer, a theoretical expression for the diffusion coefficient is derived as a function of time and the inverse of desorption rate when the fraction of diffusing substance is 0.5. Evaluation of the diffusion coefficient from an experimental desorption curve is discussed.
引用
收藏
页码:961 / 975
页数:15
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