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Correlation of kinetic parameters of sodium acetate thermal decomposition

Identyfikatory
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Thermogravimetry and differential thermal analysis were used in the study of the kinetics of non-isothermal sodium acetate's thermal decomposition under an air atmosphere. The diagrams were recorded on a sample mass of 20 mg at temperatures ranging from 20 to 600°C. Five different heating rates were used. The relations of α vs. T were estimated from the mass losses. The values of the kinetic parameters (activation energy and the pre-exponential factor) of the thermal decomposition were calculated from α(T) data in several ways: by using the integral method, applying the Coats-Redfern approximation, the modified isoconversional Coats-Redfern method, the differential method of Friedman and the Kissinger's method. A correlation was found between kinetic parameters estimated by different kinetic methods.
Rocznik
Strony
22--25
Opis fizyczny
Bibliogr. 22 poz., rys., tab.
Twórcy
autor
  • Szczecin University of Technology, Institute of Chemistry and Environmental Protection, al. Piastów 42, 71-065 Szczecin, magol@ps.pl
Bibliografia
  • (1) Mohamed M. A., Halawy S. A., Ebrahim I M. M.: The non-isothermal decomposition of cobalt acetate tetrahydrate. J. Therm. Anal., 1994, 41, 387.
  • (2) Obaid A. Y., Alyoubi A. O., Samarkandy A. A., Al-Thabaiti S. A., Al-Juaid S. S., El-Bellihi A. A., Deifallah El- H. M: Kinetics of thermal decomposition of copper (II) acetate monohydrate, J.Therm. Anal.Cal., 2000, 61, 985.
  • (3) Grotowska M., Wojciechowska R., Wojciechowski W.: The thermal decomposition of some Cr (III) complexes, J. Therm. Anal., 1990, 36, 2365.
  • (4) Ball M. C, Portwood L.: The dehydration of copper (II) acetate monohydrate, J. Therm.Anal., 1994, 41, 347.
  • (5) Afzal M., Butt P. K., Ahmad H.: Kinetics of thermal decomposition of metal acetates, J. Therm. Anal., 1991, 37, 1015.
  • (6) Ingier-Stocka E., Grabowska A.: Thermal analysis of cobalt (II) salts with some carboxilic acids, J. Therm. Anal. Cal., 1998, 54, 115.
  • (7) Judd M. D., Plunkett B. A., Pope M. I.: The thermal decomposition of calcium, sodium, silver and copper (II) acetates. J. Thermal Anal., 1974, 6, 555.
  • (8) McAdie H. G., Jervis J. M.: Thermochimica Acta, 1970, 1, 19.
  • (9) Atlas of Thermoanalytical Curves Edited by Liptay G.: Vol.1. Akadémiai Kiadó, Budapest, 1971.
  • (10) Comprehensive Chemical Kinetics, Vol.22 Elsevier, Amsterdam, Oxford, New York, 1980.
  • (11) Galwey A. K.: Decomposition reaction solid, International Review of Science: Inorganic Chemistry, Series 2, Vol. 10 Solid.(Ed. Roberts L. E. J. ) (Butterworth: London), Chap.5. 1975, 147.
  • (12) Galwey A. K.: Thermal reactions of selected solids including reactants that melt during chemical change, J. Thermal Anal., 1970, 41, 267.
  • (13) Coats A. W., Redfern J. P.: Kinetic parameters from thermogravimetric data, Nature, 1964, 201, 68.
  • (14) Burnham A. K., Braun R. L.: Global kinetic analysis of complex materials, Energy Fuels, 1999, 13, 1.
  • (15) Brown M. E., Maciejewski M, Vyazovkin S.: et al., Computational aspects of kinetic analysis, Part A, Therm. Acta, 2000, 355. 125.
  • (16) Vyazovkin S., Wight C. A.: Model-free and model-fitting approaches to kinetic analysis of isothermal and nonisothermal data, Therm. Acta, 1999, 340 - 341, 53.
  • (17) Friedman H.: J. Polym. Sci., Part C, 1963, 183.
  • (18) Mohamed M. A., Halawy S. A., Ebrahim M. M.: The non-isothermal decomposition of cobalt acetate tetrahydrate. J. Thermal Anal., 1994, 41, 387
  • (19) Kissinger H. E.: Reaction Kinetics in Differential Thermal Analysis, Anal. Chem., 1957, 29 1702.
  • (20) Straszko J., Olszak-Humienik M., Możejko J.: Kinetics of thermal decomposition of ZnSO4·7H2O. Therm. Acta. 1997, 292, 145.
  • (21) Vyazovkin S.: Modification of the integral method to account for variation in the activation energy, J. Comput. Chem., 2001, 22, 178.
  • (22) Vyazovkin S.: Evaluation of activation energy of thermally stimulated solid-state reactions under arbitrary variation of temperature, J. Comput. Chem., 1997, 22. 393.
  • (23) Vyazovkin S.: A unified approach to kinetic processing of nonisothermal data, Int. J. Chem. Kinet., 1996. 28. 95.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-article-BPS2-0039-0007
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