Evaluation of activation energy of thermally stimulated solid-state reactions under arbitrary variation of temperature
✍ Scribed by Sergey Vyazovkin
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 198 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0192-8651
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✦ Synopsis
The thermal effect of a reaction makes the temperature inside the reaction system deviate from a prescribed heating program. To take into account the effect of such temperature deviations on kinetic evaluations, a computational method applicable to an arbitrary variation in temperature has been developed. The method combines the isoconversional principle of evaluating the activation w Ž .x Ž . energy with numerical integration of the equation, d␣rdt s k T t f ␣ , over Ž . the actual variation of the temperature with the time, T t . Details of the numerical algorithm are reported. A model example has been used to verify the reliability of this method as compared to an analogous method which does not account for the deviations of the temperature from a prescribed program. The method has been tested for tolerance for noise in the temperature.