KINETICS OF THERMAL-DECOMPOSITION OF NICKEL SULFATE HEXAHYDRATE

The paper describes the kinetics of all the recorded steps of thermal decomposition of nickel sulfate hexahydrate in air. The thermal decomp osition of the salt in air led to NiO at about 1060 K. The kinetic par ameters, the activation energy E and the preexponential factor A, and the thermodynamic parameters, the entropy, enthalpy and free energy of activation were evaluated for the dehydration and decomposition react ions. Tentative reaction mechanisms are suggested for each step of the thermal decomposition.