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Two-Step Thermochemical CO2 Splitting Using Partially-Substituted Perovskite Oxides of La0.7Sr0.3Mn0.9X0.1O3 for Solar Fuel Production

Two-Step Thermochemical CO2 Splitting Using Partially-Substituted Perovskite Oxides of La0.7Sr0.3Mn0.9X0.1O3 for Solar Fuel Production

Authors :
Sawaguri, Hiroki
Gokon, Nobuyuki
Hayashi, Kosuke
Iwamura, Yoshikazu
Yasuhara, Daichi
Source :
Frontiers in Energy Research. 10
Publication Year :
2022
Publisher :
Frontiers Media SA, 2022.

Abstract

We investigated, herein, the redox activity of partial substitution of the B-site in a series of lanthanum/strontium-manganese-based (LSM) perovskite oxide, La0.7Sr0.3Mn0.9X0.1O3 for solar two-step thermochemical fuel production using concentrated solar radiation as an energy source. We systematically investigated the effects of partial substitution in LaSrMnO3 in terms of their kinetics behavior, oxygen/CO productivity, thermal reduction/oxidation temperatures. Furthermore, repeatability was evaluated and compared among the samples prepared using the same procedure and studied using the same test method. We observed and evaluated the long-term thermal stability of the redox activity and valence variation of the constituting ionic species of the perovskite in the two-step thermochemical CO2 splitting. From the perspectives of superior activity and long-term repeatability, Ni-, Co-, and Mg-substituted LSM perovskites are promising for thermochemical two-step CO2/H2O splitting to produce synthetic gas.

Details

ISSN :
2296598X
Volume :
10
Database :
OpenAIRE
Journal :
Frontiers in Energy Research
Accession number :
edsair.doi.dedup.....a3258067acc4a8ee8140ab59f50feca9
Full Text :
https://doi.org/10.3389/fenrg.2022.872959