Abstract:
Thermogravimetric analysis is one of the main
technique used in solid state reaction kinetics studies. Unlike in
gaseous and liquids state reactions, most solid-state reaction
mechanisms are complex and comprise of simultaneous
reactions. Curve fitting is one of the most used tool to obtain
kinetic parameters such as activation energy and preexponential
factor despite the reaction mechanism. Diferential
Thermo Gravimetric (DTG) signals are asymmetric and its
asymmetry depends on the kinetic triplet. Therefore, the use of
symmetric functions such as Gaussian and Lorentzian to fit
asymmetric DTG signals infer errors. To avoid that a new curve
fitting method has been introduced in this study.
