Kinetics of thermal decomposition of [Co(NH 3) 6]Cl 3

Abstract

The thermal decomposition of [Co(NH 3) 6]Cl 3 was studied under non-isothermal conditions in dynamic air and argon atmospheres and under isothermal conditions in flowing air. Dissociation of the above complex occurs in three stages. The kinetics of the particular stages of [Co(NH 3) 6]Cl 3 thermal decomposition have been evaluated from both dynamic and isothermal weight loss data. The R n models were selected as those best fitting the experimental TG curves. These models suggest that the kinetics and macromechanism of the [Co(NH 3) 6]Cl 3 dissociation can be governed by phase boundary processes. The activation energies, E α, of the particular stages of the thermal decomposition were calculated. The results have corroborated the view that combination of isothermal and non-isothermal measurements facilitates the selection of the models best fitting experimental TG curves.