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Can we trust kinetic methods of thermal analysis?

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Abstract

Solid-state reactions and phase transformations in which the activation energy changes with the extent of conversion, e.g. multi-step or dispersive kinetic processes, cannot be reliably treated using current thermal methods, particularly when it comes to handling non-isothermal data sets. New models that consider distributed reactivity and/or the potential temperature-dependence of the pre-exponential term in the Arrhenius equation are urgently needed and, based on them, the extension of current theory to appropriately treat non-isothermal data. Numerical methods could prove useful in overcoming the variable-separability problem that can hinder the analytic solution of more complex kinetic relationships.

Graphical abstract: Can we trust kinetic methods of thermal analysis?

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Article information


Submitted
02 Aug 2019
Accepted
05 Dec 2019
First published
05 Dec 2019

Analyst, 2020, Advance Article
Article type
Critical Review

Can we trust kinetic methods of thermal analysis?

P. J. Skrdla, Analyst, 2020, Advance Article , DOI: 10.1039/C9AN01477B

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