Kinetic study of a thermal dechlorination and oxidation of neodymium oxychloride

This study investigated the kinetics of a thermal dechlorination and oxidation of neodymium oxychloride (NdOCl) by using a non-isothermal thermogravimetric (TG) analysis under various oxygen partial pressures. The results of the isoconversional analysis of the TG data suggests that the dechlorination and oxidation of NdOCl follows a single step reaction and the observed activation energy was determined as 228.3 ± 6.1 kJ mol−1. A kinetic rate equation was derived for a conversion of the NdOCl into Nd2O3 with a power law model, f(α) = 2/3α−1/2. The oxygen power dependency and the pre-exponential factor were determined as 0.315 and 3.55 × 105 s−1 Pa−0.315, respectively.