Abstract
The kinetics of chlorination of hematite by Cl 2 + O 2 have been investigated in the temperature range from 600 to 1025 °C by using thermogravimetric analysis (TGA). The effects of Cl 2/O 2 ratio, gas velocity, temperature and partial pressure of reactive gases on the reaction rate were determined. The reaction rate of Fe 2O 3 chlorination increased steadily with Cl 2/O 2 ratio reaching the maximum for the chlorination in absence of oxygen. The hematite chlorination process by Cl 2 + O 2 was characterized by an apparent activation energy of about 148 kJ/mol in the whole temperature range studied. The apparent reaction orders with respect to Cl 2 + O 2, Cl 2 and O 2 at 750 °C were about 0.71, 1.44, and −0.61, respectively. Almost the same values of reaction orders were obtained at 950 °C.
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