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Thermodynamic Analysis of Mixed-Metal Ferrites for Hydrogen Production by Two-Step Water Splitting

[+] Author Affiliations
Mark D. Allendorf

Sandia National Laboratories, Livermore, CA

Richard B. Diver, Jr., James E. Miller, Nathan P. Siegel

Sandia National Laboratories, Albuquerque, NM

Paper No. ISEC2006-99114, pp. 285-290; 6 pages
  • ASME 2006 International Solar Energy Conference
  • Solar Energy
  • Denver, Colorado, USA, July 8–13, 2006
  • Conference Sponsors: Solar Energy Division
  • ISBN: 0-7918-4745-4
  • Copyright © 2006 by ASME


A thermodynamic analysis of the two-step water splitting process for the production of hydrogen is reported in this paper. Calculations simulating the preparation of ferrite samples, their thermal reduction to form a mixture of metal oxides, and subsequent reoxidation with steam to produce hydrogen were performed. Mixed-metal spinel ferrites of the general form MFe2 O4 , where M = Co, Ni, or Zn, are compared with iron spinel, Fe3 O4 . The results indicate that of the four ferrites examined, nickel spinel has the most favorable combination of properties for use in two-step water splitting.

Copyright © 2006 by ASME



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