Thermochemical splitting of CO<sub>2</sub> using solution combustion synthesized lanthanum–strontium–manganese perovskites

Thermochemical splitting of CO<sub>2</sub> using solution combustion synthesized lanthanum–strontium–manganese perovskites

<p dir="ltr">Redox reactivity of La<sub>(1-x)</sub>Sr<sub>x</sub>MnO<sub>3</sub> (LSM) perovskites towards a solar thermochemical CO<sub>2</sub> splitting (CS) cycle is investigated. The LSM perovskites are synthesized via a solution co...

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Bibliographic Details
Main Author:	Gorakshnath Takalkar (14151135) (author)
Other Authors:	Rahul R. Bhosale (6467102) (author), Fares AlMomani (14097725) (author), Suliman Rashid (14151138) (author), Hazim Qiblawey (16030546) (author), Mohammed Ali Saleh Saad (9503750) (author), Majeda Khraisheh (1349376) (author), Gopalakrishnan Kumar (167344) (author), Ram B. Gupta (1521835) (author), Rajesh V. Shende (11885834) (author)
Published:	2021
Subjects:	Engineering Chemical engineering Fluid mechanics and thermal engineering LSM perovskites CO2 splitting Solar energy Thermochemical cycles Solution combustion synthesis Thermogravimetric analysis
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Summary:	<p dir="ltr">Redox reactivity of La<sub>(1-x)</sub>Sr<sub>x</sub>MnO<sub>3</sub> (LSM) perovskites towards a solar thermochemical CO<sub>2</sub> splitting (CS) cycle is investigated. The LSM perovskites are synthesized via a solution combustion synthesis (SCS) method using glycine as the reducing agent. Multiple analytical techniques are used for the structural characterization of the LSM perovskites. Thermogravimetric thermal reduction (TR) and CS cycles (in three sets: one, three and ten cycles) are conducted to estimate the amounts of O<sub>2</sub> released (n<sub>O2</sub> ) and CO produced (n<sub>CO</sub>) by each LSM perovskite. Higher n<sub>O2</sub> by each LSM perovskite, as compared to the n<sub>CO</sub> during the first cycle. The n<sub>O2</sub> is decreased, and the re-oxidation capacity of each LSM perovskite is improved from cycle one to three. In terms of the average n<sub>O2</sub> and n<sub>CO</sub> from cycle 2 to cycle 10, the La<sub>0.60</sub>Sr<sub>0.41</sub>Mn<sub>0.99</sub>O<sub>2.993</sub> (214.8 μmol of O2/g⋅cycle) and La<sub>0.30</sub>Sr<sub>0.70</sub>Mn<sub>0.99</sub>O<sub>2.982</sub> perovskites (342.1 μmol of CO/g⋅cycle) are observed to have the uppermost redox reactivity. The redox reactivity of all the LSM perovskites (except for La<sub>0.88</sub>Sr<sub>0.11</sub>Mn<sub>1.00</sub>O<sub>2.980</sub>) is recorded to be higher than that of the widely studied CeO<sub>2</sub> material.</p><h2>Other Information</h2><p dir="ltr">Published in: Fuel<br>License: <a href="http://creativecommons.org/licenses/by/4.0/" target="_blank">http://creativecommons.org/licenses/by/4.0/</a><br>See article on publisher's website: <a href="https://dx.doi.org/10.1016/j.fuel.2020.119154" target="_blank">https://dx.doi.org/10.1016/j.fuel.2020.119154</a></p>