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采用微型流化床-过程质谱反应分析仪进行了铁矿粉的CO还原动力学研究。结果表明:微型流化床可抑制外扩散作用,利用等温方法算出的铁矿粉还原反应的活化能为26.28kJ/mol,指前因子0.039 46s-1,证明该铁矿粉还原符合气体内扩散控制机制模型,并且采用等温动力学方法可实现反应速率常数与模型函数的分离,极大地简化了计算过程,增加了动力学参数的准确性,为铁矿粉还原动力学的研究提供了一种简单可靠的测试方法。
The CO reduction kinetics of iron ore powders was investigated by using a microfluidic bed-process mass spectrometry reaction analyzer. The results show that the microfluidized bed can inhibit the external diffusion. The activation energy calculated by the isothermal method is 26.28kJ / mol and the pre-exponential factor is 0.03946s-1, which proves that the reduction of iron ore is in line with the gas diffusion Control mechanism model, and the isothermal kinetic method can be used to separate the reaction rate constant from the model function, greatly simplifying the calculation process and increasing the accuracy of kinetic parameters, providing a method for studying the reduction kinetics of iron ore powder Simple and reliable test method.