A new Approach for the Reliable Estimation of Kinetic Parameters by Means of Dynamic DSC Experiments

A new method for the assessment of the kinetic triplet (pre-exponential factor, Activation energy, kinetic model) better describing a thermal decomposition process is presented. The approach is based on the processing of three DSC thermograms collected under dynamic conditions using different heating rates. It has been shown that two of this basic set of runs allows the assessment "a priori" of the kinetic model suitable to describe the process under study (among reaction order and autocatalytic Sestak-Bergren model) while a successive multivariate procedure carried out considering these three set of data allows the assessment of the final estimate of the thermokinetic parameters. A number of examples are provided with the aim at showing that, when particular hypothesis are met, the extrapolation of the results lead to reliable previsions.