The kinetics of solid‐state reactions toward consensus, Part 2: Fitting kinetics data in dynamic conventional thermal analysis

Abstract

This paper is the second part of a review of some of the controversial kinetic aspects of conventional thermal analysis (TA). In this part the physico-geometric kinetics for the solid-state reactions were examined. The main problems discussed are (1) problems in fitting kinetics data: the identification of the f (α) function, (2) the suitability of conventional dynamic methods of TA, and (3) the complex reactions.

The determination of activation energy from linear heating rate experiments: a comparison of the accuracy of isoconversion methods

“…(1) and (2) have been proposed (a selection of methods can be found in [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]). All reliable methods of activation energy analysis require the determination of the temperatures, T f (β), at which an equivalent stage of the reaction is obtained for various heating rates.…”

“…Note also that various authors [21,29] have in the past derived Eq. (10) using a specific reaction model, but, as shown above and elsewhere [4,10,15], this limiting assumption is not required. )…”

“…Apart from the isoconversion methods a range of other methods for analysing activation energies have been proposed: the Freeman-Carroll [39] and Ellerstein methods [40], the Achar-BrindleySharp method [41] the Chatterjee method [42] and the temperature criterion method [4,43]. Characteristic of these methods is that they either assume that a particular kinetic model holds or that activation energies can be derived from a single experiment at one single heating rate.…”

“…A range of standard functions which represent particular idealised reaction models have been proposed (see e.g. [4,5]). …”

Utilization of Starink Approach and Avrami Theory to Evaluate the Kinetic Parameters of the Pyrolysis of Olive Mill Solid Waste and Olive Mill Wastewater

“…This manifestation of kinetic compensation effect could result in some difficult in determining the accurate reaction model, since more than one reaction model can be obtained using this method. Therefore, adopting the model-fitting method may bring about the highly uncertain values of the kinetic parameters [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39].…”