【摘 要】
：
The reactions between CO2 gas and liquid Fe-C alloy with different initial carbon concentrations at 1873 K were investigated using experimental results,thermodynamic equilibrium,and kinetic analysis.The average CO2 conversion is greater than 80％when the c
【机 构】
：
School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beij
论文部分内容阅读
The reactions between CO2 gas and liquid Fe-C alloy with different initial carbon concentrations at 1873 K were investigated using experimental results,thermodynamic equilibrium,and kinetic analysis.The average CO2 conversion is greater than 80％when the carbon content ranges from 4.0 to 1.0 wt.％.When the carbon content decreases from 0.5 to 0.1 wt.％,the average CO2 conversion diminishes from 83.50％to 40.84％.This proves that CO2 gas and liquid Fe-C alloy reaction does not reach equilibrium under experimental conditions compared with the calculated thermodynamic data.Through the kinetic analysis,it is shown that in the medium-to high-carbon liquid Fe-C alloys,the rate-controlling step involves CO2 gas mass transfer or mixed rate-controlling of CO2 gas mass transfer with adsorption and dissociation of CO2 gas.In contrast,in the low-carbon liquid Fe-C alloy,carbon mass transfer occurs in the molten alloy.The critical carbon content of the rate-controlling step transformation is 0.7937 wt.％.
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