Journal
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
Volume 39, Issue 8, Pages 462-471Publisher
WILEY
DOI: 10.1002/kin.20256
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Three linear isoconversional methods (Friedman, Flynn-Wall-Ozawa, and Kissinger-Akahira-Sunose) and the invariant kinetic parameters (IKP) method were used in order to examine the kinetics of the nonisothermal decomposition of a sodium bicarbonate (NaHCO3). The objective of the paper is to show the usefulness of the IKP method to determine both the kinetic parameters and the kinetic model of the investigated process. The activation energy (E-a) value obtained by the IKP method is in good agreement with the values obtained by isoconversional methods. The IKP method associated with the criterion of coincidence of kinetic parameters for all heating rates led us to the following kinetic triplet: E-a = 95.5 kJ mol(-1), A = 2.65 x 10(10) min(-1), and conversion function f(alpha) = (1 - alpha) (first-order reaction model, F1). (c) 2007 Wiley Periodicals, Inc.
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