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The kinetic analysis of non-isothermal carisoprodol reaction in nitrogen atmosphere using the invariant kinetic parameters method
Kamel, Laila Tosson
Carisoprodol
Thermal analysis
Perez-Maqueda criterion
Invariant kinetic parameters
Linear isoconversional methods
Non-isothermal kinetic parameters
The non-isothermal kinetic parameters corresponding to the thermal decomposition of carisoprodol under nitrogen atmosphere was investigated at four different heating rates 5, 10, 15 and 20 °C/min. The activation energy was determined using three linear isoconversional methods, Friedman, Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose. Results showed good agreement with each other. Invariant kinetic parameters (IKP) method was applied in the conversion range of 0.2 ≤ α ≤ 0.8 for the determination of the kinetic triplet. Einv= 95.81 kJ/mol, Ainv = 2.275×107 1/min and the decomposition mechanism corresponds to nucleation and growth, following the Avrami-Erofeev model, A1.5, as the kinetic model. The Perez-Maqueda et al. criterion associated with the independence of activation parameters on the heating rate (by means of Coats-Redfern and Flynn-Wall equation) confirmed the model.
Atlanta Publishing House LLC
2014-09-30
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
application/pdf
https://www.eurjchem.com/index.php/eurjchem/article/view/1047
10.5155/eurjchem.5.3.507-512.1047
European Journal of Chemistry; Vol. 5 No. 3 (2014): September 2014; 507-512
2153-2257
2153-2249
eng
https://www.eurjchem.com/index.php/eurjchem/article/view/1047/pdf_1047