(in lingua inglese)
Thermally activated reductions have been carried out in a solar reactor powered by a high flux solar simulator. Mn2O3, Mn3O4 and CeO2 have been the initial reactants and all of them have showed a common behavior at the beginning of the thermal treatment, giving rise to an abrupt peak of delivered oxygen. It has been observed the main factor influencing the reaction rates is the irradiance distribution onto the sample surface and low thermal conductivity of the material. For Mn2O3 reduction, total conversion has been achieved.