添加V2O5催化制备碳化铁的动力学
The Chinese Journal of Process Engineering(2008)
Abstract
研究了923~1073 K的温度范围内,1%V2O5添加剂对70%(ψ)H2+30%(ψ)CH4与铁矿石反应的动力学.运用未反应核模型,求出了不同温度下反应的表观速率常数及反应的表观活化能.结果发现添加V2O5与否铁矿石还原阶段的反应活化能变化不大,表明添加V2O5对铁矿石的还原反应促进作用较弱;添加1%V2O5的试样碳化反应活化能由72 kJ/mol降低到46.5 kJ/mol,减少了35%,说明V2O5对铁碳化反应有较强的促进作用.
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Key words
activation energy,V_2O_5 additive,iron carbide,kinetics
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