A correct kinetic description of solid-state reactions

Abstract

The usual procedure of evaluating kinetic parameters from thermogravimetric data is revised. It is shown that correct results can be obtained in the case of affinity of α(t) curves, because this type of kinetic energy of activation characterizes the process of reaction interface propagation (for heterogeneous reactions). A method of kinetic investigation based on the formation of a special reaction front with a fixed and constant-in-time reaction interface area is proposed. The connection of the observed kinetic parameters with the mechanism of interface propagation is considered within the scope of the model of a self-propagation reaction front.