Abstract
The gasification process of metallurgical coke with 0, 0.5, 1, and 1.5 wt pct Fe2O3 was investigated through thermogravimetric method from ambient temperature to 1573.15 K in purified CO2 atmosphere. Characteristic temperature decreases gradually with increasing Fe2O3; it indicates that the coke gasification process can be catalyzed by the Fe2O3 addition. Three nth-order representative gas-solid models: random pore model (RPM), volume reaction model (VM), and unreaction core model (URCM) were used to interpret the carbon conversion data. The kinetic analysis showed that the RPM described the coke gasification with CO2 better than that of URCM. Using the kinetic model to calculate the coke samples, the activation energy lied in the range of 203.6–212.4 kJ/mol, which was in the same decreasing trend with the temperature parameters analyzed by the thermogravimetric method.
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