Kinetic analysis of thermogravimetric data,VI |
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Authors: | J Zsakó |
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Institution: | (1) Faculty of Chemistry, Babes-Bolyai University, Cluj, Rumania |
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Abstract: | The basic hypotheses of methods used for deriving kinetic parameters from TG data are discussed. The erroneous character of the methods which use more than a single TG curve is shown by comparing the shapes of ideal and real TG curves. The correctness of three integral methods is tested on ideal TG curves. The physical significance of the kinetic parameters and their correlation are discussed.
Zusammenfassung Die Grundhypothesen der zur Ableitung kinetischer Parameter aus TG-Daten verwendeten Methoden werden erörtert. Der fehlerhafte Charakter der Methoden, welche mehr als eine einzige TG-Kurve verwenden, wird durch den Vergleich der Formen idealer und realer TG-Kurven veranschaulicht. Die Richtigkeit dreier Integralmethoden wird an idealen TG-Kurven geprüft. Die physikalische Bedeutung kinetischer Parameter und ihre Korrelation werden erläutert.
Résumé On discute les hypothèses de base des méthodes utilisées pour déduire les paramètres cinétiques des données TG. Le caractère erroné des méthodes utilisant plus d'une courbe TG est mis en évidence en comparant les formes idéales et réelles des courbes TG. Le degré d'exactitude de 3 méthodes intégrales est examiné sur des courbes TG idéales. On discute la signification physique des paramètres cinétiques et leur corrélation.
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