Perovskite nanocomposites as effective CO<sub>2</sub>-splitting agents in a cyclic redox scheme.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 28875171.
- Also identified by DOI 10.1126/sciadv.1701184 and PMC identifier 5576875.
- Licence recorded as CC BY-NC.
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Abstract
We report iron-containing mixed-oxide nanocomposites as highly effective redox materials for thermochemical CO<sub>2</sub> splitting and methane partial oxidation in a cyclic redox scheme, where methane was introduced as an oxygen "sink" to promote the reduction of the redox materials followed by reoxidation through CO<sub>2</sub> splitting. Up to 96% syngas selectivity in the methane partial oxidation step and close to complete conversion of CO<sub>2</sub> to CO in the CO<sub>2</sub>-splitting step were achieved at 900° to 980°C with good redox stability. The productivity and production rate of CO in the CO<sub>2</sub>-splitting step were about seven times higher than those in state-of-the-art solar-thermal CO<sub>2</sub>-splitting processes, which are carried out at significantly higher temperatures. The proposed approach can potentially be applied for acetic acid synthesis with up to 84% reduction in CO<sub>2</sub> emission when compared to state-of-the-art processes.