Journal ArticleDOI
Steam-iron process: Influence of steam on the kinetics of iron oxide reduction
TLDR
In this paper, the effect of water vapour on the kinetics of the steam-iron process was investigated and two models, the competitive model and the inhibitive model, were proposed to predict the behavior of the solid subjected to successive reductive and oxidative cycles.About:
This article is published in International Journal of Hydrogen Energy.The article was published on 2011-10-01. It has received 35 citations till now. The article focuses on the topics: Iron oxide & Reaction rate.read more
Citations
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Effect of reducing conditions on swelling behavior and mechanism of Hongge vanadium titanomagnetite-oxidized pellet with hydrogen-rich gases
TL;DR: In this article, the effect of reducing conditions on swelling behavior and mechanism of Hongge vanadium titanomagnetite-oxidized pellet (HVTMP) is conducted with hydrogen-rich gases of dry pulverized coal gasification, water-coal slurry gasification (WCSG), Midrex, and HYL-Ⅲ.
Journal ArticleDOI
Determining the kinetic rate constants of Fe3O4-to-Fe and FeO-to-Fe reduction by H2
TL;DR: In this paper , a kinetic study specifically designed to attain kinetic rate constants of one-step reduction of Fe 3 O 4 -toFe and FeO-toFe was performed, and the authors found that the kinetics of the two one-stage reduction reactions followed nicely the Johnson-Mehl-Avrami (JMA) phase transformation model.
Journal ArticleDOI
Hydrothermal Steel Slag Valorization—Part II: Hydrogen and Nano-Magnetite Production
Camille Crouzet,Camille Crouzet,Camille Crouzet,Fabrice Brunet,Nadir Recham,Anne-Line Auzende,Nathaniel Findling,Valérie Magnin,Jean-Henry Ferrasse,Bruno Goffé +9 more
TL;DR: In this article, the effect of pH and temperature on the kinetics of the hydrothermal oxidation of ferrous iron contained in BOF steel slag has been tested in the 150 − 350°C range for acid acetic concentrations from 0 to 4M.
Journal ArticleDOI
Numerical simulation of effect of operating conditions on flash reduction behaviour of magnetite under H2 atmosphere
TL;DR: In this article, the flash reduction behavior of in-flight magnetite particles under hydrogen atmosphere is investigated by an Eulerian-Lagrangian model to explore the effect of operating conditions.
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Iron as recyclable energy carrier: Feasibility study and kinetic analysis of iron oxide reduction
TL;DR: In this paper , a feasibility study for iron as possible metal fuel considering the complete energy cycle is conducted, and it is shown that the power-to-power efficiency of the iron/iron oxide cycle is 27 %.
References
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Journal ArticleDOI
Kinetics of Phase Change. II Transformation‐Time Relations for Random Distribution of Nuclei
TL;DR: In this article, a relation between the actual transformed volume V and a related extended volume V1 ex is derived upon statistical considerations, and a rough approximation to this relation is shown to lead, under the proper conditions, to the empirical formula of Austin and Rickett.
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Reduction behavior of iron oxides in hydrogen and carbon monoxide atmospheres
TL;DR: In this paper, a three-stage mechanism for the reduction of various iron oxides in hydrogen and carbon monoxide atmospheres has been investigated by temperature programmed reduction (TPR H2 and TPR CO ), thermo-gravimetric and differential temperature analysis (TG-DTA-MS), and conventional and in situ XRD methods.
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Kinetics of reduction of iron oxides by H2: Part I: Low temperature reduction of hematite
TL;DR: In this article, the reduction of Fe3O4 by H2 in the temperature range of 210-950 °C was investigated and the results showed that the reaction rate is controlled by diffusion and SEM observations confirm the sintering of the reaction products.
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The mechanism of reduction of iron oxide by hydrogen
TL;DR: In this paper, temperature-programmed reduction was used to characterize precipitated iron oxide samples and two-stage reduction was observed: Fe2O3 was reduced to Fe3O4 and then reduced to metallic Fe.