Abstract：The effect of 3 kinds of cheap catalysts,Na₂CO₃,Fe(NO₃)₃ and CaO,on the steam gasification reaction of metallurgical broken coke were investigate using the thermo-gravimetric analyzer and the steam as the gasifier.The catalytic gasification kinetics was discussed.The results show that the gasification temperature of the coke decreases about 170 ℃after the addition of the catalyst.The catalytic activity of Na₂CO₃ is the highest among the three catalysts.With the increase of Na₂CO₃ loading (sodium ion loading are 1%, 3%, 5% and 10%, mass fractions) ,the gasification rate of the cokes are improved, about 5% of the Na₂CO₃ loading reaches saturation,the excess catalyst can't effectively improve the gasification rate of coke.The addition of Na₂CO₃ effectively reduces the activation energy of the coke gasification reaction,thus increasing the reaction rate.Gasification of coke with added Na₂CO₃,the shrinking core model can well reflect the kinetics of coke gasification.

Keywords: metallurgical coke; thermo-gravimetric analyzer; catalytic gasification; shrinking core model