# HYTHEC: An EC funded search for a long term massive hydrogen production route using solar and nuclear technologies

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Abstract : The objective of HYTHEC-HYdrogen THErmo-chemical Cycles-is to investigate the effective potential for massive hydrogen production of the S-I thermo-chemical cycle, and to compare it with the hybrid S Westinghouse (WH) cycle. The project aims to conduct flow-sheeting, industrial scale-up, safety and costs modelling, to improve the fundamental knowledge and efficiency of the S-I cycle H$_2$ production step, and to investigate a solar primary energy source for the H$_2$ SO$_4$ decomposition step which is common to both the cycles. Initial reference flow-sheets have been prepared and compared. First data and results are available now on the coupling of S-I cycle with a very high temperature nuclear reactor, scale-up to industrial level and cost estimation, improvement of the knowledge of the HI x mixture (S-I cycle) and membrane separation, splitting of sulphuric acid using a solar furnace, and plant concepts regarding the WH process.
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Journal articles

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https://hal-cea.archives-ouvertes.fr/cea-02512145
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Alain Le Duigou, Jean-Marc Borgard, Bruno Larousse, Denis Doizi, Ray Allen, et al.. HYTHEC: An EC funded search for a long term massive hydrogen production route using solar and nuclear technologies. International Journal of Hydrogen Energy, Elsevier, 2007, 32 (10-11), pp.1516-1529. ⟨10.1016/j.ijhydene.2006.10.047⟩. ⟨cea-02512145⟩

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