Improved iterative version of the Coats-Redfern method to evaluate non-isothermal kinetic parameters

An improved version of the Coats-Redfern method of evaluating non-isotherma l kinetic parameters is presented. The Coats-Redfern approximation of the t emperature integral is replaced by a third-degree rational approximation, w hich is much more accurate. The kinetic parameters are evaluated iterativel y by linear regression and, besides the correlation coefficient, the F test is suggested as a supplementary statistical criterion for selecting the mo st probable mechanism function. For applications, both non-isothermal data obtained by theoretical simulation and experimental data taken from the lit erature for the non-isothermal dehydration of Mg(OH)(2) have been processed .