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Kinetics of oxychlorination of magnesium oxide

Abstract : The kinetics of oxychlorination of MgO by Cl2+O2 was studied in the temperature range of 850 degrees C - 1025 degrees C, using thermogravimetric analysis. The effects of Cl2/O2 ratio, gas velocity, temperature and partial pressure of reactive gases on the reaction rate were investigated. The oxychlorination process was characterized by an apparent activation energy of about 214 kJ/mol. The reaction orders with respect to Cl2+O2 , Cl2 and O2 at 950 degrees C were about 0.65, 0.98, and -0.37, respectively. Some data about oxychlorination kinetics of MgO, Cr2O3, and MgCr2O4 contained in chromite were compared. Efficiency of using oxychlorination for the removal of iron oxides contained in magnesia was demonstrated.
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Ndue Kanari, Eric Allain, I. Gaballah. Kinetics of oxychlorination of magnesium oxide. 1999 TMS Annual Meeting, 1999, SAN DIEGO, CA, United States. pp. 29-37. ⟨hal-01510701⟩



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