Interfacial reaction kinetics in the decarburization of liquid iron by carbon dioxide
Interfacial reaction kinetics in the decarburization of liquid iron by carbon dioxide
复制标题
二氧化碳脱铁液的界面反应动力学
DOI：
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复制
发表时间：
1976
期刊：
影响因子：
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通讯作者：
G. Belton
中科院分区：
文献类型：
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作者：
D. Sain;G. Belton
The kinetics of decarburization of liquid iron have been studied between 1160 and 1600°C under conditions where mass transport of reactants is not rate determining. Studies with continuously carbon-saturated iron and of iron with varying carbon concentration have been used to show that the slow step at high concentrations of carbon is independent of carbon concentration and is first order with respect to the pressure of CO2. For high purity iron, the forward rate constant, in mole cm2 s-1 atm-1, is given by the equation ln kf = -11,700/T-0.48. It is concluded that the data are consistent with the chemisorption process as the rate limiting step. A marked sensitivity of the rate to trace amounts of sulfur has been found and it is shown that this is consistent with ideal adsorption of sulfur and is in fair accord with the existing measurements of the depression of the surface tension of iron-carbon alloys by sulfur.
