Dehydration kinetics of ulexite by thermogravimetric data using the Coats-Redfern and genetic algorithm method

被引:11
作者
Okur, H [1 ]
Eymir, Ç [1 ]
机构
[1] Ataturk Univ, Fac Engn, Dept Chem, TR-25240 Erzurum, Turkey
关键词
D O I
10.1021/ie020929n
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
There are various methods for determining the reaction parameters using thermal analysis data. In recent years, genetic algorithms have been considered as a new method for the determination of kinetic parameters. In the present study, calcination kinetics of ulexite was investigated by thermogravimetry (TG) using the Coats-Redfern and genetic algorithm methods. The parameters of reaction (activation energy, frequency factor, and order of reaction) and their relative standard deviations were calculated by the Coats-Redfern and genetic algorithm methods. Also, the results obtained from both methods were compared. For the second region of the dehydration process, the Coats-Redfern method gave meaningless results although the genetic algorithm method gave acceptable results. As a result, it can be said that the Coats-Redfern method would not be used for reactions having low activation energies.
引用
收藏
页码:3642 / 3646
页数:5
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