Journal
RSC ADVANCES
Volume 4, Issue 11, Pages 5583-5590Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ra45595e
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Funding
- Natural Science Foundation of China [21301186]
- Chinese Academy of Sciences [XDA05010109, XDA05010110, XDA05010204]
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Thermochemical CO2 splitting was carried out over ceria/zirconia solid solutions prepared via a P123-added hydrothermal method in the temperature range of 1100-1400 degrees C. XRD, Raman and TPR characterization indicated that the introduction of Mg and Ca into ceria/zirconia could produce lattice defects in the fluorite lattice, and then strongly modify the mobility of oxygen as well as the thermal stability of the samples. As compared to Mg-doped samples, faster reaction rates and higher CO2 splitting reactivity were obtained over Ca-doped samples, because of the faster oxygen mobility in Ca-Ce-Zr-O ternary solid solutions. Moreover, the porous structure with small particle size favoured the thermal reduction and the mass diffusion. As a result, fast reaction rates and relatively high fuel productivity were obtained at the moderate thermal reduction temperature (1200 degrees C).
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