Abstract
The kinetics of the thermal decomposition of manganese(II) acetate tetrahydrate were studied using isothermal and dynamic thermogravimetric techniques. The dehydration of the tetrahydrate proceeds via a two-stage reaction, each stage involving loss of two water molecules, while the thermal decomposition of the anhydrous salt proceeds in one step to MnO. Kinetic analysis of isothermal data of the three decomposition reactions, when compared with the various solid state reaction models, showed that the reactions are best described by the phase boundary and random nucleation models. Kinetic analysis of the dynamic TG curves were discussed with reference to a composite integral method, in comparison with the integral methods due to Coats and Redfern and to Ozawa. The activation parameters were calculated and the results of the isothermal and dynamic integral methods were compared and discussed.
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