Journal ArticleDOI
Steam-iron process: Influence of steam on the kinetics of iron oxide reduction
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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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Journal ArticleDOI
Reduction of Iron Oxides with Hydrogen—A Review
Daniel Spreitzer,Johannes Schenk +1 more
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In Situ DRIFTS-MS Study of the Anaerobic Oxidation of Ethanol over Spinel Mixed Oxides
Juliana Velasquez Ochoa,Cristian Trevisanut,Cristian Trevisanut,Jean-Marc M. Millet,Guido Busca,Fabrizio Cavani +5 more
TL;DR: In this paper, the anaerobic oxidation of ethanol over spinel mixed oxides was studied by means of in situ diffuse reflectance spectroscopy (DRIFTS) and mass spectrometry (MS).
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Sticking of iron ore pellets during reduction with hydrogen and carbon monoxide mixtures: Behavior and mechanism
TL;DR: In this paper, the effects of the temperature, syngas constituents and reduction degree on the sticking properties of iron ore pellets in the presence of H2-CO mixtures were evaluated.
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Magnetic bio-activated carbon production from lignin via a streamlined process and its use in phosphate removal from aqueous solutions.
TL;DR: The results indicate that iron species are embedded into the carbon matrix by lignin melting, suggesting that the representative MBAC product has a comparable phosphate adsorption capacity to most of the reported MBCs and MBACs.
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Role of Catalyst Oxidation State in the Growth of Vertically Aligned Carbon Nanotubes
TL;DR: In this article, the impact of gas phase pretreatment of a supported iron-oxide catalyst utilized in aligned carbon nanotube (CNT) growth is studied to understand the correlation between the catalyst oxidation state and the growth characteristics of the aligned CNT forests.
References
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Journal ArticleDOI
Studies on the reduction of iron oxide with hydrogen
TL;DR: In this article, the hydrogen reduction of pure α-Fe 2 O 3 doped with foreign metal oxides employing a sensitive micro-gravimetric technique was carried out by a consecutive two-step mechanism via Fe 3 O 4, the overall rate being controlled by the topochemical reduction of Fe 3 o 4 while that of doped oxides and hematite ore takes place by a different mechanism involving the mixed ferrite formed.
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Preparation and properties of iron oxide and metallic iron catalysts.
TL;DR: In this article, it is argued that the reduction of (supported) iron oxide is governed by the transport of water vapor out of the pores of the system being reduced, and thus the reduction is difficult.
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Pure hydrogen from pyrolysis oil using the steam-iron process
TL;DR: In this paper, pyrolysis oil was used in the steam-iron process to produce pure hydrogen, and the results showed that CO and H2 as well as coke by the gasification reactions contribute to the reduction.
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Stabilizing Iron Oxide Used in Cycles of Reduction and Oxidation for Hydrogen Production
Christopher D. Bohn,J. P. E. Cleeton,Christoph R. Müller,S. Y. Chuang,Stuart A. Scott,John S. Dennis +5 more
TL;DR: In this article, modified iron oxide, Fe2O3, was used to produce pure H2 using repeated cycles of reduction and oxidation, and the addition of a metal additive was shown to improve and sometimes stabilize the quantity of H2 produced when reduced to Fe.
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Kinetic study of the redox process for storing hydrogen: Reduction stage
TL;DR: In this article, the suitability of different metallic oxides for the redox process of metal oxides and subsequent oxidation by steam to release hydrogen was evaluated by means of a thermogravimetric system and the kinetic parameters of the reduction of the oxides by hydrogen were calculated by fitting experimental data with suitable ad hoc models for non-catalytic gas-solid reactions.