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Critical study of the isoconversional methods of kinetic analysis

 

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Author: Criado Luque, José Manuel
Sánchez Jiménez, Pedro Enrique
Pérez Maqueda, Luis Allan
Department: Universidad de Sevilla. Departamento de Química Inorgánica
Date: 2008
Published in: Journal of thermal Analysis and Calorimetry, 92, 1-17.
Document type: Article
Abstract: A critical study of the use of isoconversional methods for the kinetic analysis of non-isothermal data corresponding to processes with either a real or an apparent variation of the activation energy, E, with the reacted fraction, α, has been carried out using for the first time simulated curves. It has been shown that the activation energies obtained from model-free methods are independent of the heating rate. However, the activation energy shows a very strong dependence of the range of heating rates used for simulating the curves if the apparent change of E with α is caused by overlapping processes with different individual activation energies. This criterion perhaps could be used for determining if a real dependence between E and α is really occurring
Cite: Criado Luque, J.M., Sánchez Jiménez, P.E. y Pérez Maqueda, L.A. (2008). Critical study of the isoconversional methods of kinetic analysis. Journal of thermal Analysis and Calorimetry, 92, 1-17.
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URI: https://hdl.handle.net/11441/74166

DOI: 10.1007/s10973-007-8763-7

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