Experimental and Modeling Studies Using Fe₂O₃ Doped Coke

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.