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T–S diagram efficiency analysis of two-step thermochemical cycles for solar water splitting under various process conditions

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  • Lange, M.
  • Roeb, M.
  • Sattler, C.
  • Pitz-Paal, R.

Abstract

Temperature–entropy diagrams combined with a pinch point analysis are introduced, providing a vivid and detailed tool to analyse two-step thermochemical water-splitting processes. The impacts of different temperature and pressure conditions, as well as different water conversion rates, are studied. Further, requirements regarding the entropy change in the redox material to reach desired process conditions are presented. This paper provides insights on how future research shall be oriented to achieve optimal conditions for this challenging but also very promising class of reactions.

Suggested Citation

  • Lange, M. & Roeb, M. & Sattler, C. & Pitz-Paal, R., 2014. "T–S diagram efficiency analysis of two-step thermochemical cycles for solar water splitting under various process conditions," Energy, Elsevier, vol. 67(C), pages 298-308.
    • Handle: RePEc:eee:energy:v:67:y:2014:i:c:p:298-308
    DOI: 10.1016/j.energy.2014.01.112
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    References listed on IDEAS

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    Cited by:

    1. Hyun-Seok Cho & Tatsuya Kodama & Nobuyuki Gokon & Selvan Bellan & Jong-Kyu Kim, 2021. "Development of Synthesis and Fabrication Process for Mn-CeO 2 Foam via Two-Step Water-Splitting Cycle Hydrogen Production," Energies, MDPI, vol. 14(21), pages 1-14, October.
    2. 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.
    3. Mao, Yanpeng & Gao, Yibo & Dong, Wei & Wu, Han & Song, Zhanlong & Zhao, Xiqiang & Sun, Jing & Wang, Wenlong, 2020. "Hydrogen production via a two-step water splitting thermochemical cycle based on metal oxide – A review," Applied Energy, Elsevier, vol. 267(C).
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    6. Christopher L. Muhich & Brian D. Ehrhart & Ibraheam Al-Shankiti & Barbara J. Ward & Charles B. Musgrave & Alan W. Weimer, 2016. "A review and perspective of efficient hydrogen generation via solar thermal water splitting," Wiley Interdisciplinary Reviews: Energy and Environment, Wiley Blackwell, vol. 5(3), pages 261-287, May.

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    More about this item

    Keywords

    T–S diagram; Thermochemical cycle; Solar water splitting; Efficiency; H2; Hydrogen;
    All these keywords.

    JEL classification:

    • H2 - Public Economics - - Taxation, Subsidies, and Revenue

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