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Information × Registration Number 0225U004012, (0122U201407) , R & D reports Title Study of thermodynamic conditions of stepwise reduction of iron, manganese and silicon from their oxides due to CO gas and solid carbon popup.stage_title Дослідження термодинамічних умов ступінчастого відновлення заліза, марганцю і кремнію з їх оксидів за рахунок газу СО і твердого вуглецю Head Panteikov Serhii P., к.т.н. Registration Date 20-10-2025 Organization Dniprovsk State Technical University popup.description1 Thermodynamic analysis of the possibility and conditions of stepwise recovery of iron, manganese and silicon from their oxides by indirect (using CO gas) and direct (using solid carbon) methods popup.description2 Object of research – the processes of stepwise reduction of iron from hematite, manganese from manganese dioxide, and silicon from silicon dioxide by the reducing gas CO and solid carbon C. Purpose of the work – thermodynamic analysis of the course of chemical reactions in the processes of stepwise reduction of iron from hematite, stepwise reduction of manganese from manganese dioxide, and stepwise and single-stage reduction of silicon from silicon dioxide by the reducing gas CO and solid carbon C, as well as the process of gasification of solid carbon C. The analysis is based on the calculation results of the temperature dependence of Gibbs free energy for reduction reactions (direct method) and oxidation reactions (indirect method) of all substances involved in the above-mentioned reduction reactions. Research methods – Theoretical method (search and generalization of data from technical literature for calculating Gibbs free energy of reactions, including the stepwise reduction of Fe from FeO, stepwise reduction of Mn from MnO₂, stepwise and single-stage reduction of Si from SiO₂ by CO gas and solid carbon C, as well as oxidation reactions such as Fe₃O₄ → Fe₂O₃, FeO → Fe₃O₄, Fe → FeO, Mn₂O₃ → MnO₂, Mn₃O₄ → Mn₂O₃, MnO → Mn₃O₄, Mn → MnO, SiO → SiO₂, Si → SiO and Si → SiO₂, C → CO and C → CO₂, CO → CO₂ by gaseous oxygen O₂), Empirical method (numerical experiment using proprietary formulas for calculating numerical values of the isobaric–isothermal potential of all the above-mentioned chemical reactions; formulation of descriptions, conclusions for each section, and general conclusions for the study), Graphical method (determination of the numerical values of the limiting temperatures for all the above-mentioned chemical reactions. The presented results include thermodynamic analysis of the stepwise reduction reactions of Fe, Mn, and Si from their oxides by CO gas and solid carbon C. Product Description popup.authors Andrii A. Romanenko Yaroslav I. Bondarenko popup.nrat_date 2025-11-03 Close