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An Electric Circuit Analogy Model for Analyzing the Relation Between CO and H2 in Interfacial Reduction Reactions
Metallurgical and Materials Transactions B ( IF 3 ) Pub Date : 2022-06-20 , DOI: 10.1007/s11663-022-02570-x
Junyi Deng, Lingxiao Bai, Panshuai Ma, Kaihui Ma, Jian Xu

Clean energies are promising alternatives to fossil fuels in the steel industry to reduce carbon dioxide (CO2) emissions and consequently suppress global warming. The first step for achieving the goal is to partially replace carbon monoxide (CO) by hydrogen (H2) in the iron oxide reduction reactions. Therefore, the competitive interaction between the CO and H2 in gas–solid reactions should be first unraveled. The gaseous reduction experiments in this work employ CO, H2, and their mixture to reduce the wustite (FeO) when the interfacial chemical reaction is the rate-controlling step. We establish an electric circuit analogy model to clarify the gaseous components’ interaction based on experimental kinetics analysis, and a linear relation is highlighted and further validated to model gaseous reduction reaction rates under present experimental conditions. The results are expected to provide quantitative insight into the competitive interaction between gaseous components in the reduction process controlled by the interfacial reaction.



中文翻译:

用于分析界面还原反应中 CO 和 H2 之间关系的电路类比模型

清洁能源是钢铁行业化石燃料的有前途的替代品,可减少二氧化碳 (CO 2 ) 排放,从而抑制全球变暖。实现该目标的第一步是在氧化铁还原反应中用氢气 (H 2 )部分取代一氧化碳 (CO) 。因此,首先应该解开气固反应中CO和H 2之间的竞争性相互作用。本工作中的气体还原实验采用 CO、H 2, 以及它们的混合物在界面化学反应是速率控制步骤时减少方晶石 (FeO)。我们在实验动力学分析的基础上建立了一个电路类比模型来阐明气体组分的相互作用,并强调并进一步验证了在当前实验条件下模拟气体还原反应速率的线性关系。该结果有望提供定量洞察在由界面反应控制的还原过程中气态组分之间的竞争性相互作用。

更新日期:2022-06-21
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