高圧下における酸化鉄ペレットの H_2 と CO の混合ガスによる還元反応速度

概要

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In order to clarify the reduction behaviour of iron oxide pellets at high pressures, a single iron oxide pellet was experimentally reduced with the mixtures of hydrogen and carbon monoxide at 1000℃. The results obtained were analized by a mathematical model representing the reduction rate of a single iron oxide pellet with the mixtures at high pressures. The reduction rate equation of pellets with the mixtures was derived from the three-interface core model on the basis of following assumptions : the reduction rate may be calculated by summing the reaction due to hydrogen and carbon monoxide with the pellet and these reactions proceed independently. In this model, the rate parameters were determined by the reduction of the pellet with hydrogen or carbon monoxide independently. However, diffusion coefficients were evaluated as binary diffusion of hydrogen and carbon monoxide. The calculated reduction curves based on the rate equation were found to be in a relatively good agreement with observed curves over the range of gas concentrations, temperatures, and pressures examined. It was found that the reduction rate equation in the paper could be applied to the analysis of the reduction process with mixtures of hydrogen and carbon monoxide at high pressures.
社団法人日本鉄鋼協会の論文
1980-03-01