Determination of Diffusivity Using the Characteristic Function for the Regular Regime

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Masamichi Yoshida¹  Hironobu Imakoma¹  Morio Okazaki¹ 

[1] Department of Chemical Engineering, Kyoto University

关键词: Desorption;    Characteristic Function;    Variable Diffusivity;    Regular Regime;   

DOI  :  10.1252/jcej.24.720

来源: Maruzen Company Ltd

【 摘 要 】

References(7)Cited-By(13)A new method is proposed for determining diffusivity from experiments in desorption of a component migrating through a medium such as solution and porous solid. In this analysis the equation representing the desorption from a plane sheet whose surface concentration is zero is solved numerically to establish an expression describing the process. Thus it becomes possible to deduce the concentration dependence of the diffusivity for a wide range of concentrations from a single desorption experiment. Application of this method to desorption rate curves obtained numerically shows that the method has good practicality when the diffusivity increases with concentration.

【 授权许可】

Unknown