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Issue 11, 2014
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Enhanced thermochemical CO2 splitting over Mg- and Ca-doped ceria/zirconia solid solutions

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Abstract

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 °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 °C).

Graphical abstract: Enhanced thermochemical CO2 splitting over Mg- and Ca-doped ceria/zirconia solid solutions

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Article information


Submitted
05 Oct 2013
Accepted
17 Dec 2013
First published
17 Dec 2013

RSC Adv., 2014,4, 5583-5590
Article type
Paper

Enhanced thermochemical CO2 splitting over Mg- and Ca-doped ceria/zirconia solid solutions

M. Kang, X. Wu, J. Zhang, N. Zhao, W. Wei and Y. Sun, RSC Adv., 2014, 4, 5583
DOI: 10.1039/C3RA45595E

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