Comparison of the Reducibilities of Hydrogen and Carbon Monoxide for Iron Oxides
- Autores: Kuznetsov Y.1, Mikhailov G.1, Kachurina O.1
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Afiliações:
- South Ural State University (National Research University)
- Edição: Volume 2019, Nº 7 (2019)
- Páginas: 698-709
- Seção: Article
- URL: https://journals.rcsi.science/0036-0295/article/view/173350
- DOI: https://doi.org/10.1134/S0036029519070097
- ID: 173350
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Resumo
Abstract—Thermodynamic analysis of the reduction of iron oxides in gas mixtures with H2 and CO shows that the ratio of the reducibilities of these gases (γ) can decrease or increase with temperature or can be temperature-independent under different conditions. This contradicts the commonly accepted assertion that the reducibilities of H2 and CO at 1093 K are equal and that the reducibility of H2 increases with temperature when considering the intersection of the reduction curves and superimposing the equilibrium phase diagrams iron oxides–CO–CO2 and iron oxides–H2–H2O. In this case, the parameters of a specific reduction technology, the composition of the formed water gas, and the possibility of soot carbon formation are ignored. In particular, when Fe3O4 is reduced to FeO in the presence of carbon in the temperature range 850–917 K and FeO is reduced to Fe in the range 850–955 K, the ratio of the reducibilities of H2 and CO changes from zero to 5.76 depending on the temperature, the nature of the initial system, and its composition. It is shown that, for any technological organization, the reduction of Fe3O4 to FeO is characterized by γ = 1.71 in the presence of carbon at 917 K and the reduction of FeO to Fe at 955 K is characterized by γ = 2.30.
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Sobre autores
Yu. Kuznetsov
South Ural State University (National Research University)
Autor responsável pela correspondência
Email: kuznetcovys@susu.ru
Rússia, Chelyabinsk
G. Mikhailov
South Ural State University (National Research University)
Autor responsável pela correspondência
Email: mikhailovgg@susu.ru
Rússia, Chelyabinsk
O. Kachurina
South Ural State University (National Research University)
Autor responsável pela correspondência
Email: kachurinaoi@susu.ru
Rússia, Chelyabinsk