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The deviation of the true heating rate with respect to the programmed one

Consequences for non-isothermal kinetics

  • Theory and Kinetics
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Abstract

The paper deals with the influence of the deviation of the true heating rate with respect to the programmed one on the values of non-isothermal kinetic parameters for the solid-gas thermal decompositions of CaC2O4.H2O and [Ni(NH3)6]Br2. An original method, based on integration over small ranges of the variables and making use of local heating rates, was applied in order to determine the non-isothermal kinetic parameter values. The results show significant differences between values of non-isothermal kinetic parameters obtained by using true local heating rates and those obtained by using the programmed heating rate.

Zusammenfassung

Es wird der Einfluß der Abweichung der tatsächlichen Aufheizgeschwindigkeit (bezogen auf die programmierte Aufheizgeschwindigkeit) auf die Werte von nichtiso-thermen kinetischen Parametern der thermischen Feststoff-Gas-Zersetzungsreaktionen von CaC2O4.H2O und [Ni(NH3)6]Br2 untersucht. Zur Bestimmung der nichtisothermen kinetischen Parameter wird eine Methode verwendet, die auf der Integration kleiner Variablen-Intervalle und der Ausnutzung lokaler Aufheizgeschwindigkeiten beruht. Die Resultate Zeigen signifikante Unterschiede zwischen den nichtisothermen kinetischen Parameterm, die für die tatsächlichen bzw. die programmierten Aufheizgeschwindigkeiten erhalten wurden.

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Authors and Affiliations

  1. Thermosis Ltd., P.O. Box 187, 4000, Sfintu Gheorghe, Romania

    E. Urbanovici

  2. Department of Physical Chemistry, Faculty of Chemistry, University of Bucharest, BD. Carol I, NR. 13, Bucharest, Romania

    E. Segal

Authors
  1. E. Urbanovici
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  2. E. Segal
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Urbanovici, E., Segal, E. The deviation of the true heating rate with respect to the programmed one. Journal of Thermal Analysis 40, 1321–1329 (1993). https://doi.org/10.1007/BF02546896

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  • DOI: https://doi.org/10.1007/BF02546896

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