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Determination of temperature effect of oxychlorination of Cr2O3 and MgO using non-isothermal conditions

Abstract : The effect of temperature on the oxychlorination of Cr2O3 and MgO using Cl2+O2 was evaluated using non-isothermal conditions. A mathematical treatment of the experimental data was performed. Results were compared with those obtained using isothermal conditions. The oxychlorination of Cr2O3 up to 650°C was characterized by an apparent activation energy ‘Ea’ of ca. 83 kJ/mol. Beyond 650°C, the reaction proceeded with an Ea of ca. 51 kJ/mol. Between 850 and 1025°C, the reaction of MgO with Cl2+O2 was strongly dependent on temperature and its Ea was equal to ca. 215 kJ/mol. The values of the apparent activation energies, found for the oxychlorination of both oxides using non-isothermal conditions, were comparable to those obtained during isothermal treatment.
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https://hal.univ-lorraine.fr/hal-01507670
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Ndue Kanari, I. Gaballah, Eric Allain. Determination of temperature effect of oxychlorination of Cr2O3 and MgO using non-isothermal conditions. Thermochimica Acta, Elsevier, 2000, 351 (1-2), pp.131-137. ⟨10.1016/S0040-6031(00)00430-5⟩. ⟨hal-01507670⟩

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