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Design Study of a Pilot Test Plant for Hydrogen Production by a Hybrid Thermochemical Process

[+] Author Affiliations
Patrick Rivalier, Sophie Charton, Denis Ode, Jean Duhamet, Laurence Boisset, Jean-Louis Pabion, Florent Gandi, Jean-Pierre Croze

Commissariat à l’Énergie Atomique, Bagnols sur Cèze, France

Paper No. ICONE16-48584, pp. 841-849; 9 pages
  • 16th International Conference on Nuclear Engineering
  • Volume 1: Plant Operations, Maintenance, Installations and Life Cycle; Component Reliability and Materials Issues; Advanced Applications of Nuclear Technology; Codes, Standards, Licensing and Regulatory Issues
  • Orlando, Florida, USA, May 11–15, 2008
  • Conference Sponsors: Nuclear Engineering Division
  • ISBN: 0-7918-4814-0 | eISBN: 0-7918-3820-X
  • Copyright © 2008 by ASME


Mass production of hydrogen is a major issue for the coming decades, particularly for greenhouse gas lowering purpose. Thanks to fourth-generation nuclear reactors development, providing high-temperature energy, hydrogen production processes are currently revisited worldwide. In France, the CEA is particularly investigating the Westinghouse hybrid sulfur cycle. This cycle, which combines an electrolysis step (oxidization of SO2 to H2 SO4 from a liquid-phase anode stream) and a thermochemical step (decomposition of H2 SO4 ), was developed in the 1970s by Westinghouse Electric Corporation. Its production capacity was demonstrated at a scale of 150 NL·h−1 of hydrogen and a conceptual plant, designed to produce 90 Nm3 ·s−1 , was developed in 1977. This plant was however never built, probably for both economic and technological reasons. Since 2000, the Westinghouse process is the subject of renewed interest. Indeed, the decomposition of sulfuric acid has been investigated in detail (many thermochemical cycles are based on sulfur) and it is now optimized from a thermodynamic standpoint. Moreover, the substantial research efforts devoted to fuel cells have led to the development of new materials and structures that are expected to yield significant performance improvements when applied to classical electrochemical processes. Therefore, the CEA has decided to build a pilot electrolysis facility with an hydrogen capacity of 100 NL·h−1 , allowing implementation of the most promising material technologies.

Copyright © 2008 by ASME



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