Carbochlorination of samarium sesquioxide

The chlorination of Sm2O3 in the presence of carbon using the gaseous mixture Cl2(g)+Ar(g) has been studied by thermogravimetry. The effects of both the temperature between 200 and 950 °C and the total gas flow rate between 2.1 and 7.9 l h−1 on the reaction rate were analyzed. The starting temperature of reaction, the stoichiometry and kinetic regimes of the reaction were obtained. Reactants and products were analyzed by X-ray diffraction (XRD) and electronic dispersive spectroscopy (EDS). The temporal evolution of the solid microstructure was followed by scanning electron microscopy (SEM).