Determination of intrinsic kinetics parameters for MoO₃ chlorination with Cl₂ gas between 798 and 873 K
2012
De Micco, G. | Carignan, M. | Canavesio, C.A. | Bohé, A.E.
In this work the kinetics of the chlorination of molybdenum trioxide has been studied by thermogravimetry between 798 and 873 K. The starting temperature for the reaction of MoO₃ with chlorine is determined at about 770 K. The influence of gaseous flow rate, sample mass, temperature, and chlorine partial pressure in the reaction rate is analyzed for two MoO₃ samples having different particle size and morphology. The experimental conditions for chemical control of the reaction rate were established for both types of samples. An average activation energy of 211 kJ mol⁻¹ and a reaction order of 1 with respect to chlorine partial pressure were determined for the chlorination of MoO₃ with gaseous chlorine. A complete rate equation was formulated that describes the reaction evolution of each type of solid.
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