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The influence of the experimental conditions on the calculated kinetic parameters of the thermal dehydration of K(NbW)O6 H2O were studied using quasi-isothermal (Q-TGA) and high resolution (TGA Hi-Res) thermogravimetric techniques. The dependence of (Ea)α shows the importance of the partial pressure of the gaseous product (PH2O) in the vicinity of the reactant. The results show the limited validity of kinetic data calculated from experiments carried out under arbitrary chosen conditions, although the experimental conditions are strictly controlled.

Palabras clave: isoconversion method; dehydration kinetics; high resolution thermogravimetry, quasi-isothermal thermogravimetry, influence of experimental conditions.
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Universidad Autónoma del Estado de México
Sistema de Información Científica Redalyc ®
Versión 3.0 | 2018
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