Screening of water-splitting thermochemical cycles potentially attractive for hydrogen production by concentrated solar energy |
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Affiliation: | 1. Solar Technology Laboratory, Paul Scherrer Institute, 5232 Villigen, Switzerland;2. Department of Mechanical and Process Engineering, ETH Zurich, 8092 Zurich, Switzerland;1. Processes, Materials and Solar Energy Laboratory, CNRS-PROMES, 7 Rue du Four Solaire, 66120, Font-Romeu, France;2. Institut Européen des Membranes, IEM, UMR-5635, ENSCM, CNRS, Univ Montpellier, Place Eugène Bataillon, 34095, Montpellier cedex 5, France;3. ALSYS-CTI, 382 avenue du Moulinas, 30340, Salindres, France |
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Abstract: | Hydrogen, a promising and clean energy carrier, could potentially replace the use of fossil fuels in the transportation sector. Currently, no environmentally attractive, large-scale, low-cost and high-efficiency hydrogen production process is available for commercialization. Solar-driven water-splitting thermochemical cycles may constitute one of the ultimate options for CO2-free production of hydrogen. The method is environmentally friendly since it uses only water and solar energy. First, the potentially attractive thermochemical cycles must be identified based on a set of criteria. To reach this goal, a database that contains 280 referenced cycles was established. Then, the selection and evaluation of the promising cycles was performed in the temperature range of 900–2000 °C, suitable to the use of concentrated solar energy. About 30 cycles selected for further investigations are presented in this paper. The principles and basis for a thermodynamic evaluation of the cycles are also given. |
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