Journal ArticleDOI
The mechanism of reduction of iron oxide by hydrogen
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TLDR
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.About:
This article is published in Thermochimica Acta.The article was published on 2003-04-17. It has received 272 citations till now. The article focuses on the topics: Iron oxide cycle & Temperature-programmed reduction.read more
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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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Iron oxide surfaces
TL;DR: In this paper, a review of the current status of knowledge regarding the surfaces of the iron oxides, magnetite (Fe3O4), maghemite (γ-Fe2O3), haematite (α-Fe 2O3, and wustite (fe1−xO) is reviewed.
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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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Reduction of Fe2O3 with hydrogen
TL;DR: In this paper, the reduction of Fe 2 O 3 with hydrogen was studied and the thermodynamic analysis of the process implied that temperature-programmed reduction of the oxide should proceed in three steps.
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Reduction of nitrate by zero valent iron (ZVI)-based materials: A review.
Yong Liu,Jianlong Wang +1 more
TL;DR: The strategies for enhancing the reduction efficiency and the N2 selectivity of the reductive products of nitrate were systematically analyzed and evaluated, especially the optimization of the structure of ZVI composites and the addition of reducing assistants.
References
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Journal ArticleDOI
Kinetics of Phase Change. I General Theory
TL;DR: In this paper, the theory of phase change is developed with the experimentally supported assumptions that the new phase is nucleated by germ nuclei which already exist in the old phase, and whose number can be altered by previous treatment.
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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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Granulation, Phase Change, and Microstructure Kinetics of Phase Change. III
TL;DR: In this paper, a comprehensive description of the phenomena of phase change may be summarized in Phase Change, Grain Number and Microstructure Formulas or Diagrams, giving, respectively, the transformed volume, grain, and microstructure densities as a function of time, temperature, and other variables.
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Kinetic analysis of thermogravimetric data
TL;DR: The kinetic analysis of the thermogram, by use of either its exact equation or a more convenient approximation formula, is straightforward in cases of volatilization via simple kinetics as mentioned in this paper.