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Two-step water-splitting at 1273–1623K using yttria-stabilized zirconia-iron oxide solid solution via co-precipitation and solid-state reaction

Author

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  • Ishihara, H.
  • Kaneko, H.
  • Hasegawa, N.
  • Tamaura, Y.

Abstract

Reactive ceramics are investigated for potential use in a rotary-type solar reactor. The two-step water-splitting process, which consists of O2-releasing (MOoxidized=MOreduced+1/2O2) and H2-generation (MOreduced+H2O(g)=MOoxidized+H2) reactions with yttria-stabilized zirconia (YSZ)-iron oxide solid solutions prepared by co-precipitation and solid-state reaction, is examined at temperatures of 1623K for O2 release and 1273K for H2 generation. The YSZ-iron oxide solid solutions with a single phase are obtained at mole ratios lower than 15% and 20% of iron ions to total cations (Fe3+, Zr4+, Y3+) by co-precipitation and the solid-state reaction, respectively. The two-step water-splitting process using YSZ-iron oxide solid solutions prepared by both preparation methods are repeated successfully. The amount of O2 gas evolved per weight of the sample (ml/g) is observed to increase with the iron content of the YSZ-iron oxide solid solution because of the high reactivity of iron ions in the solid solution. The maximum amounts of H2 and O2 gases evolved in the two-step water-splitting process with the YSZ-iron oxide solid solution were 0.89 and 1.2ml/g, respectively.

Suggested Citation

  • Ishihara, H. & Kaneko, H. & Hasegawa, N. & Tamaura, Y., 2008. "Two-step water-splitting at 1273–1623K using yttria-stabilized zirconia-iron oxide solid solution via co-precipitation and solid-state reaction," Energy, Elsevier, vol. 33(12), pages 1788-1793.
    • Handle: RePEc:eee:energy:v:33:y:2008:i:12:p:1788-1793
    DOI: 10.1016/j.energy.2008.08.005
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    References listed on IDEAS

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    1. Palumbo, R. & Keunecke, M. & Möller, S. & Steinfeld, A., 2004. "Reflections on the design of solar thermal chemical reactors: thoughts in transformation," Energy, Elsevier, vol. 29(5), pages 727-744.
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    1. Agrafiotis, Christos & Roeb, Martin & Sattler, Christian, 2015. "A review on solar thermal syngas production via redox pair-based water/carbon dioxide splitting thermochemical cycles," Renewable and Sustainable Energy Reviews, Elsevier, vol. 42(C), pages 254-285.
    2. Milanese, Marco & Colangelo, Gianpiero & Laforgia, Domenico & de Risi, Arturo, 2017. "Multi-parameter optimization of double-loop fluidized bed solar reactor for thermochemical fuel production," Energy, Elsevier, vol. 134(C), pages 919-932.
    3. Rahul Bhosale & Anand Kumar & Fares AlMomani & Ujjal Ghosh & Mohammad Saad Anis & Konstantinos Kakosimos & Rajesh Shende & Marc A. Rosen, 2016. "Solar Hydrogen Production via a Samarium Oxide-Based Thermochemical Water Splitting Cycle," Energies, MDPI, vol. 9(5), pages 1-15, April.

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