A software is described enabling kinetic analysis under non-isothermal or isothermal conditions from DSC, or from TG data. The program offers thirteen methods of kinetic analysis for DSC, three for isothermal analysis and two for TG, with eight different functions for the choice of the proper mechanism for each of them.

Different kinetic equations analysis

Kinetic parameters from the non-isothermal decomposition of a multi-component solid

Comparison of methods concerning the selection of a function describing the thermal decomposition of solids

Investigations for the environmentally friendly production of Na2CO3 and HCl from exhaust CO2, NaCl and H2O

This paper discusses the performance of a variety of numerical methods applied to the determination of the rate constant and order of contracting interface reactions in the solid state. The methods studied are (a) a direct search method proposed by Varhegyi, (b) a modification of Varhegyi's method which involves a unidimensional search, (c) the direct search procedure of Hooke and Jeeves and (d) the Gauss-Newton technique of non-linear least squares. The results demonstrate that the modified strategy (b) is by far the most efficient of the three direct search methods but that the non-linear least squares technique is superior in performance to any of the direct search methods.

The numerical computation of kinetic parameters for contracting interface reactions

The kinetics of many solid state reactions can best be explained in terms of an order of reaction; this is particularly true in the case of polymer degradation. The methods currently available for the determination ofn andk, from isothermal data, are either limited in the range ofα which can be used or are difference-difference techniques where the data must of necessity be highly accurate. This paper presents a review of these methods and introduces a new approach by whichn andk can be obtained directly, giving results which are unique and objective in that they provide a best fit to the experimental data.

M. D. Judd

Papers

The determination of kinetic parameters for some solid state reactions