Premium
The use of the IKP method for evaluating the kinetic parameters and the conversion function of the thermal decomposition of NaHCO 3 from nonisothermal thermogravimetric data
Author(s) -
Janković Bojan,
Adnađević Borivoj
Publication year - 2007
Publication title -
international journal of chemical kinetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.341
H-Index - 68
eISSN - 1097-4601
pISSN - 0538-8066
DOI - 10.1002/kin.20256
Subject(s) - kinetic energy , chemistry , decomposition , activation energy , thermogravimetric analysis , thermal decomposition , kinetics , thermodynamics , sodium bicarbonate , function (biology) , physics , organic chemistry , quantum mechanics , evolutionary biology , biology
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 (NaHCO 3 ). 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 × 10 10 min −1 , and conversion function f (α) = (1 − α) (first‐order reaction model, F1). © 2007 Wiley Periodicals, Inc. Int J Chem Kinet 39: 462–471, 2007