STUDIES ON ISOTHERMAL KINETICS OF SOME REACTIONS OF ALUMINUM OXIDES AND HYDROXIDES

Thermal decomposition and hydrothermal reactions of aluminum oxides and hydroxides were studied. The starting material was gibbsite pretreated by grinding in different ways. Sixteen kinetic models were fitted and the rate constants were estimated at different temperatures. Mechanical activation of the starting gibbsite had an effect on the reactivity of samples in several subsequent reactions.