COMPARISON AMONG TECHNIQUES TO RETRIEVE KINETIC PARAMETERS FROM THERMOGRAVIMETRY DATA
Titel:
COMPARISON AMONG TECHNIQUES TO RETRIEVE KINETIC PARAMETERS FROM THERMOGRAVIMETRY DATA
Auteur:
Fischer-Calderon, P. Ernesto Flores, Ramon J.
Verschenen in:
Chemical engineering communications
Paginering:
Jaargang 81 (1989) nr. 1 pagina's 167-175
Jaar:
1989-07-01
Inhoud:
A statistical comparison of methods used to retrieve kinetic information from thermogravimetric analysis (TGA) data was done. The objective of this work was to try to establish if there is a difference between the kinetic parameters predicted using: Coats and Redfern (1964), and its modifications: Fischer, el al. (1987), Chen and Nuttal (Nutall et al. 1983), Reich and Stivala (1980), and Horowitz and Metzger (1963). All these methods were tested using data obtained by numerical integration of a first order irreversible reaction under typical TGA conditions, and to study the effects of experimental error in parameter estimation these data were perturbed by introducing a random error variation in the numerical data. From the results, the first three methods are statistically similar, while the last two produce significantly erroneous values even with no error present in the data
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