Two difference-differential methods for the evaluation of kinetic parameters from non-isothermal data are analysed.In order to determine kinetic parameters from non-isothermal data, the difference-differential method proposed by Freeman and Carroll [1 ] is widely used [2,3 ]. The main relationship on which the Freeman-Carroll method is based as follows:where A = difference operator, c~ = conversion degree, t = time, n = reaction order, E = activation energy, R = gas constant = 1.987 cal mole -i K -1, T --temperature in K.This can be applied on one of the following particular forms:
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