Isokinetic and Compensation Temperature in the Analysis of Thermal Dissociation of the Solid Phase under Dynamic Conditions

Andrzej Mianowski, Tomasz Radko and Rafał Bigda ()
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Andrzej Mianowski: Institute of Energy and Fuel Processing Technology, Zamkowa 1, 41-803 Zabrze, Poland
Tomasz Radko: Institute of Energy and Fuel Processing Technology, Zamkowa 1, 41-803 Zabrze, Poland
Rafał Bigda: Institute of Energy and Fuel Processing Technology, Zamkowa 1, 41-803 Zabrze, Poland

Energies, 2023, vol. 16, issue 15, 1-28

Abstract: Sets of Arrhenius parameters, determined according to known different equations for dynamic conditions, in the vast majority form the Kinetic Compensation Effect ( KCE ). Converting these data to the simplified components of the Eyring equation comes down to Enthalpy–Entropy Compensation ( EEC ), which is consistent with the second law of thermodynamics. It has been proved that the impact of the generally known Coats−Redfern solution on the equation in differential form results in an isokinetic form of the equations and a very important coordinate T 0 ; α 0 (initial temperature and conversion degree), depending on the heating rate. This makes it possible to determine the parameters of Arrhenius’ law for both in silico and experimental data. An analytical method for determining this coordinate has been proposed. These considerations have given rise to an analysis of the relationship between two temperatures: initial and isokinetic. The sense of isokinetic temperature has been verified by the parameters CQF and K . Going further, it was found that the effects of EEC can be transformed into KCE and vice versa, which means that the two temperatures should be identical, i.e., T i s o = T c . However, the experimental data indicate that the analyzed temperatures form a sequence T 0 ↔ T i s o ↔ T c ≤ T e q , where T e q is the equilibrium temperature.

Keywords: isokinetic and compensation temperature; isokinetics; kinetic compensation effect; enthalpy–entropy compensation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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