Thermochemical hydrogen production by a redox system of ZrO2-supported Co(II)-ferrite
2004; Elsevier BV; Linguagem: Inglês
10.1016/s0038-092x(04)00083-0
ISSN1471-1257
Autores Tópico(s)Phase Change Materials Research
ResumoThe thermochemical two-step water splitting was examined on ZrO2-supported Co(II)-ferrites below 1400 °C, for purpose of converting solar high-temperature heat to clean hydrogen energy as storage and transport of solar energy. The ferrite on the ZrO2-support was thermally decomposed to the reduced phase of wustite at 1400 °C under an inert atmosphere. The reduced phase was reoxidized with steam on the ZrO2-support to generate hydrogen below 1000 °C in a separate step. The ZrO2-supporting alleviated the high-temperature sintering of iron oxide. As the results, the ZrO2-supported ferrite realized a greater reactivity and a better repeatability of the cyclic water splitting than the conventional unsupported ferrites. The CoxFe3−xO4/ZrO2 with the x value of around 0.4–0.7 was found to be the promising working material for the two-step water splitting when thermally reduced at 1400 °C under an inert atmosphere.
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