Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 40: Issue 3
Effect of sample mass on the kinetics of thermal decomposition of a solid II. Isothermal dehydration of Li2SO4·H2O
Authors: N. Koga 1 and H. Tanaka 1
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  • 1 Hiroshima University Chemistry Laboratory, Faculty of School Education 3-1-33 Shinonome, Minami-Ku 734 Hiroshima Japan
DOI:
https://doi.org/10.1007/bf02546880
Page Count:
1173–1179
Publication Date:
01 Oct 1993
Online Publication Date:
09 Jan 2007
Article Category:
Research Article
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Abstract  

Effects of sample mass on the kinetics of isothermal dehydration of crushed crystals of Li2SO4·H2O were investigated using conventional TG. The process was characterized by a combination of Avrami-Erofeyev and contracting geometry models. Distribution of the fractional reaction, α, in particles within the sample assembly as well as the change in the rate of gross diffusion of the evolved water vapour appear responsible for the sample-mass-dependent kinetic parameters obtained for the system.

Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943
Keywords:
effect of sample mass; isothermal dehydration; kinetics; Li2SO4·H2O

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