High temperature experiments with a solar furnace: The decomposition of Fe3O4, Mn3O4, CdO

Sibieude, F.; Ducarroir, M.; Tofighi, A.; Ambriz, J.J

doi:10.1016/0360-3199(82)90209-9

Cited by 114 publications

(44 citation statements)

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“…It needs high temperature to have a good rate of reaction, less than 4000 K takes it out of the range for solar applications. Nevertheless the current research in the world for hydrogen production is focused on the so called redox pair cycles for water splitting (Agrafiotis et al, 2007;Steinfeld, 2005;Steinfeld et al, 1999;Ambriz et al, 1982;Sibieude et al, 1982;Valdés-Parada et al, 2011). Those cycles bypass the hydrogen and oxygen separation problem and allows to operate at lower temperatures.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Numerical Analysis of a Thermochemical Solar Reactor

Vázquez–Rodríguez¹,

Varela-Ham²,

Avalos-Zuniga³

et al. 2014

Energy Research Journal

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In this study a 2D transient temperature distribution in a onedimensional thermochemical solar reactor of gas-particles is presented. The gas-particles medium is contained in a reactor where an endothermic chemical reaction of some oxide-metal at high temperature is expected to be occurred. The reactor receives the concentrated solar power on the reactor walls, or directly to the gas-particles medium. As expected the temperature distribution in the reactor is quite homogeneous when it operates to close steady state conditions, but also due to the fact that the inlet cold gas is reheated with the exit warm gas. However, when the reactor starts to operate, the temperature distribution is non-homogeneous depending on how the reactor receives the concentrated solar power.

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Section: Introductionmentioning

confidence: 99%

Heat Transfer Numerical Analysis of a Thermochemical Solar Reactor

Vázquez–Rodríguez¹,

Varela-Ham²,

Avalos-Zuniga³

et al. 2014

Energy Research Journal

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“…Sibieude et al [10] demonstrated reduction of Fe 3 O 4 to FeO in a solar furnace by heating the material 300°C above its melting point. They could obtain up to 40 % conversion in air and 100 % conversion in argon atmosphere.…”

Section: Introductionmentioning

confidence: 99%

“…Sibieude et al [10] have studied reduction of Mn 3 O 4 to MnO in a solar furnace. They could Ehrensberger et al [11] have studied non-stoichiometric FeMn oxides for two-step water-splitting reaction.…”

Section: Introductionmentioning

confidence: 99%

Thermochemical hydrogen production from water using reducible oxide materials: a critical review

D’Souza

2013

Mater Renew Sustain Energy

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This review mainly focuses on summarizing the different metal oxide systems utilized for water-splitting reaction using concentrated solar energy. Only two or three cyclic redox processes are considered. Particle size effect on redox reactions and economic aspect of hydrogen production via concentrated solar energy are also briefly discussed. Among various metal oxides system CeO 2 system is emerging as a promising candidate and researchers have demonstrated workability of this system in the solar cavity-receiver reactor for over 500 cycles. The highest solar thermal process efficiency obtained so far is about 0.4 %, which needs to be increased for real commercial applications. Among traditionally studied oxides, thin-film ferrites looks more promising and could meet US Department of energy target of $2.42/kg H 2 by 2025. The cost is mainly driven by high heliostat cost which needs to reduced significantly for economic feasibility. Overall, more work needs to be done in terms of redox material engineering, reactor technology, heliostat cost reduction and gas separation technologies before commercialization of this technology.

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“…• C 700 Nakamura (1977), estudado experimentalmente por Sibieude et al (1982) e apresentado nas reações químicas das eqs. 2.22 e 2.23.…”

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“…(2.23) Sibieude et al (1982) estudaram o ciclo experimentalmente, em um simulador solar de 2 kW, e observaram a necessidade do resfriamento do produto da etapa de redução para evitar a reoxidação. Este processo introduz irreversibilidades e é um fator de complexidade para produção em larga escala (Tamaura et al, 1999).…”

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Estudo experimental do processo de oxidação do ferro com vapor de água para a produção de gás hidrogênio.

Goto¹

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AgradecimentosOs agradecimentos principais são direcionados ao Prof. Dr. José Roberto Simões Moreira pela orientação e ao Prof. Dr. Marcelo Breda Mourão pela ajuda e direcionamento deste trabalho. Ao técnico do SISEA Thyago Reynaldo e para os técnicos do PMT Lívio, Danilo, Rafael e Rubens pela ajuda. Aos colegas do laboratório LM 2 C 2 César, LinaMaria, Matheus e o estagiário Gustavo pela ajuda. Aos meus colegas e (Ex)-integrantes do laboratório SISEA Bruno, Eli, Erick, Beethoven, Adrienne, Bernardo e pelo apoio e dedicação. A todos amigos e colegas pelo apoio. Finalmente, agradeço à minha família, pelo apoio e a minha namorada Pamela Jordana pelo companheirismo e paciência. À CAPES pela concessão da bolsa de mestrado para a realização desta pesquisa. ResumoNeste trabalho, foi estudado a oxidação do ferro com vapor d'água em forno elétrico, para a produção de gás hidrogênio. Partindo-se da revisão bibliográfica, escolheu-se o ferro devido suas propriedades e por apresentar um bom rendimento, além disso o ferro é um material barato e abundante. Na estudo experimental foi três experimentos diferentes. No primeiro, o ferro foi oxidado em forno elétrico em temperaturas de 600 a 1000• C, variando a cada 100• C, e tempo fixado em 3 horas. Na segunda série de experimento, foi fixado a temperatura em 800• C e variou a duração do processo de oxidação de 1 a 4 horas, com variação de 1 hora. E na terceira série de experimentos foi realizado a análise termogravimétrica para avaliação da cinética química do processo de oxidação. Os resultados dos experimentos indicaram a produção de gás hidrogênio em quantidades maiores em temperatura de 1000• C. Além disso foi possível observar que a taxa de oxidação do ferro é maior durante a primeira hora de ensaio. A estimativa de hidrogênio produzido é de 0,9549 g/min − m 2 em oxidação a 1000• C. Já nos resultados da termogravimetria foi obtido a energia de ativação de 147 kJ/mol. Palavras-chaves:Hidrogênio, Oxidação de ferro, Ciclos termoquímicos, Combustível solar. AbstractIn this work was studied the oxidation of iron by steam in the electric furnace to produce hydrogen. The first step was the literature review and iron oxide was chose to be oxidized, due to its characteristics and good yield. Furthermore, the iron is a cheap and abundant in the earth. In the experimental studies was conducted three different experiments. The First one, the iron was oxidized in the electric furnace in the temperature range of 600 -1000• C with a variation of 100 • C and the oxidation time was fixed in 3 hours. The second experiment was conducted with fixed temperature of 800• C and varied the oxidation time, the range of time was from 1 to 4 hours with a variation of 1 hour. The third experiment was the thermogravimetric analysis to study the chemical kinetics, with three different temperature, 600, 800 and 1000• C. The result of studies showed that a high temperature the hydrogen production increased and decreased with low temperature. Furthermore, the high oxidation rate was observed in the first h...

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High temperature experiments with a solar furnace: The decomposition of Fe3O4, Mn3O4, CdO

Cited by 114 publications

References 1 publication

Heat Transfer Numerical Analysis of a Thermochemical Solar Reactor

Heat Transfer Numerical Analysis of a Thermochemical Solar Reactor

Thermochemical hydrogen production from water using reducible oxide materials: a critical review

Estudo experimental do processo de oxidação do ferro com vapor de água para a produção de gás hidrogênio.

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