Dissociation of magnetite in a solar furnace for hydrogen production. Tentative production evaluation of a 1000 kW concentrator from small scale (2 kW) experimental results

Tofighi, A.; Sibieude, F.

doi:10.1016/0360-3199(84)90079-x

Cited by 44 publications

(14 citation statements)

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“…In addition to stoichiometric FeO, thermodynamics predicts the formation of non-stoichiometric wüstite phases (Fe 1−y O such as Fe 0.947 O) ( Figure 9). The thermal reduction of magnetite has been experimentally studied [88][89][90][91][92][93][94] and demonstrated by using a 2 kW (thermal power) parabolic solar concentrator. The reduction of magnetite was only noticeable at temperatures above the Fe 3 O 4 melting point (1597 • C).…”

Section: Non-volatile Metal Oxide Cyclesmentioning

confidence: 99%

“…The reduction of magnetite was only noticeable at temperatures above the Fe 3 O 4 melting point (1597 • C). Tofighi et al [89,90] showed that a 0.8 g sample reached 80% conversion after 5 min at 2000 • C in an Ar atmosphere (the conversion in air only reaches 40%). Because of the high temperature thermal treatment, the Fe 3 O 4 reduction occurs concomitantly with a slight material vaporization.…”

Section: Non-volatile Metal Oxide Cyclesmentioning

confidence: 99%

“…The research investigations regarding high-temperature cycles were mainly focused on CdO/Cd [39], ZnO/Zn , SnO 2 /SnO [76][77][78][79][80][81][82], Mn 2 O 3 /MnO [83], CeO 2 /Ce 2 O 3 [84][85][86], and Fe 3 O 4 /FeO [87][88][89][90][91][92][93][94][95]. The utilization of mixed metal oxides (e.g.…”

Section: Introductionmentioning

confidence: 99%

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Metal Oxides Applied to Thermochemical Water-Splitting for Hydrogen Production Using Concentrated Solar Energy

Abanades

2019

ChemEngineering

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Solar thermochemical processes have the potential to efficiently convert high-temperature solar heat into storable and transportable chemical fuels such as hydrogen. In such processes, the thermal energy required for the endothermic reaction is supplied by concentrated solar energy and the hydrogen production routes differ as a function of the feedstock resource. While hydrogen production should still rely on carbonaceous feedstocks in a transition period, thermochemical water-splitting using metal oxide redox reactions is considered to date as one of the most attractive methods in the long-term to produce renewable H2 for direct use in fuel cells or further conversion to synthetic liquid hydrocarbon fuels. The two-step redox cycles generally consist of the endothermic solar thermal reduction of a metal oxide releasing oxygen with concentrated solar energy used as the high-temperature heat source for providing reaction enthalpy; and the exothermic oxidation of the reduced oxide with H2O to generate H2. This approach requires the development of redox-active and thermally-stable oxide materials able to split water with both high fuel productivities and chemical conversion rates. The main relevant two-step metal oxide systems are commonly based on volatile (ZnO/Zn, SnO2/SnO) and non-volatile redox pairs (Fe3O4/FeO, ferrites, CeO2/CeO2−, perovskites). These promising hydrogen production cycles are described by providing an overview of the best performing redox systems, with special focus on their capabilities to produce solar hydrogen with high yields, rapid reaction rates, and thermochemical performance stability, and on the solar reactor technologies developed to operate the solid–gas reaction systems.

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Section: Non-volatile Metal Oxide Cyclesmentioning

confidence: 99%

Section: Non-volatile Metal Oxide Cyclesmentioning

confidence: 99%

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Metal Oxides Applied to Thermochemical Water-Splitting for Hydrogen Production Using Concentrated Solar Energy

Abanades

2019

ChemEngineering

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“…This proposition introduced the notion of metal oxides as thermochemical reaction media and a new strategy for thermochemical fuel production [40]. The first CSPaided TR experiments of oxide pairs such as Fe 3 O 4 /FeO or Mn 3 O 4 / MnO were performed in the early '80s at the solar furnace facilities of Laboratoire PROcédés, Matériaux et Energie Solaire (PROMES) in Odeillo, France [41][42][43]. Even though the "proof-of-concept" of the particular process was demonstrated, the temperature needed was higher than the melting points of Fe 3 O 4 (1808 K) and FeO (1643 K).…”

Section: Feedstocksmentioning

confidence: 99%

A review on solar thermal syngas production via redox pair-based water/carbon dioxide splitting thermochemical cycles

Agrafiotis

Roeb

Sattler

2015

Renewable and Sustainable Energy Reviews

349

151

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“…duction of zinc oxide ZnO Palumbo et al, 1998 , iron oxide Ž .Ž . Fe O Nakamura, 1977;Tofighi and Sibieude, 1984 . Sturzenegger and Nuesch, 1999 .…”

Section: Introductionmentioning

confidence: 99%

Novel solar reactor for studying ultrafast gas–solid reactions above 2,000 K

Steiner¹,

Ganz²,

Meier³

et al. 2003

AIChE Journal

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Dissociation of magnetite in a solar furnace for hydrogen production. Tentative production evaluation of a 1000 kW concentrator from small scale (2 kW) experimental results

Cited by 44 publications

References 0 publications

Metal Oxides Applied to Thermochemical Water-Splitting for Hydrogen Production Using Concentrated Solar Energy

Metal Oxides Applied to Thermochemical Water-Splitting for Hydrogen Production Using Concentrated Solar Energy

A review on solar thermal syngas production via redox pair-based water/carbon dioxide splitting thermochemical cycles

Novel solar reactor for studying ultrafast gas–solid reactions above 2,000 K

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