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Issue 3, 2012
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Syngas production by simultaneous splitting of H2O and CO2via ceria redox reactions in a high-temperature solar reactor

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Abstract

Solar syngas production from H2O and CO2 is experimentally investigated using a two-step thermochemical cycle based on cerium oxide redox reactions. A solar cavity-receiver containing porous ceria felt is directly exposed to concentrated thermal radiation at a mean solar concentration ratio of 2865 suns. In the first endothermic step at 1800 K, ceria is thermally reduced to an oxygen deficient state. In the second exothermic step at 1100 K, syngas is produced by re-oxidizing ceria with a gas mixture of H2O and CO2. The syngas composition is experimentally determined as a function of the molar co-feeding ratio H2O : CO2 in the range of 0.8 to 7.7, yielding syngas with H2 : CO molar ratios from 0.25 to 2.34. Ten consecutive H2O/CO2-splitting cycles performed over an 8 hour solar experimental run are presented.

Graphical abstract: Syngas production by simultaneous splitting of H2O and CO2via ceria redox reactions in a high-temperature solar reactor

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Article information


Submitted
08 Sep 2011
Accepted
24 Oct 2011
First published
18 Nov 2011

Energy Environ. Sci., 2012,5, 6098-6103
Article type
Paper

Syngas production by simultaneous splitting of H2O and CO2via ceria redox reactions in a high-temperature solar reactor

P. Furler, J. R. Scheffe and A. Steinfeld, Energy Environ. Sci., 2012, 5, 6098
DOI: 10.1039/C1EE02620H

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