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Mathematical considerations for nonisothermal kinetics in thermal decomposition

✍ Scribed by José A. Caballero; Juan A. Conesa

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
665 KB
Volume
73
Category
Article
ISSN
0165-2370

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✦ Synopsis

In this paper we present an overview of the most relevant mathematical aspects involved in the kinetic analysis of thermal decomposition processes, especially when TG-DTG is used. The topics presented comprise errors introduced in the kinetic analysis by deviations in temperature from the preset control temperature program; treatment of 'raw-data' introducing simple techniques for filtering the data and get both smooth and accurate derivative thermogravimetric curves; comments on the correct specification of the mathematical model; fitting data to a mathematical model: the (arguably) obsolete differential methods, and the integral methods at the view of the modern computers; validity of the least-squares approach and modern techniques of optimization applied to the TG/DTG analysis; and quality of the fit and the fitted parameters.

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