Kinetic analysis of thermogravimetric data; discrimination of integral models

Abstract A novel procedure is presented for the discrimination of kinetic models and evaluation of kinetic parameters from thermogravimetic (TG) data. A constant temperature and constant conversion kinetic analysis is explained from TG curves and the relation between TG data and constant temperature and constant conversion data is developed. These relationships enable us to study separately the influence of α and T in the kinetic model. This procedure was tested against theoretical data and was found to be satisfactory. Advantages of this method are: it is relatively simple to use, it allows the user readily to discern whether the data deviate from the kinetic model (α- t ) or whether the deviation takes place under the influence of temperature on the kinetic parameters.