Kinetic analysis for non-isothermal decomposition of un-irradiated and gamma-irradiated potassium bromate
The thermal decomposition of un-irradiated and gamma-irradiated potassium bromate (KBrO 3 ) was performed under non-isothermal conditions at different heating rates (5, 10, 15 and 20 K min −1 ). The data was analysed using isoconversional and non-isoconversional methods. The kinetic parameters of th...
Saved in:
Published in | Journal of radioanalytical and nuclear chemistry Vol. 295; no. 1; pp. 53 - 61 |
---|---|
Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
2013
Springer |
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The thermal decomposition of un-irradiated and gamma-irradiated potassium bromate (KBrO
3
) was performed under non-isothermal conditions at different heating rates (5, 10, 15 and 20 K min
−1
). The data was analysed using isoconversional and non-isoconversional methods. The kinetic parameters of thermal decomposition process were obtained by three model-free isoconversional methods: Flynn–Wall–Ozawa, Kissinger–Akahira–Sunose and Friedman. Irradiation enhances the decomposition and the effect increases with the irradiation dose. The activation energy decreases on irradiation. Kinetic analysis of data in view of various solid-state reaction models showed that the decomposition of un-irradiated and irradiated anhydrous KBrO
3
is best described by the Avrami–Erofeev model equation, [−ln(l−
α
)]
1/2
=
kt
. |
---|---|
Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0236-5731 1588-2780 |
DOI: | 10.1007/s10967-012-1916-6 |