Abstract
AbstractEstimation of the solar‐to‐fuel energy conversion efficiency (with and without heat recuperation) of the Sm2O3/SmO‐based solar‐driven thermochemical CO2 splitting cycle is reported. HSC Chemistry 9.9 software and its thermodynamic database were utilized for the thermodynamic analysis. The temperatures required for the partial thermal reduction (TR) of Sm2O3 and the reoxidation of SmO via CO2 splitting (CS) reaction were identified. The thermodynamic modeling equations and the process flow configuration for the Sm2O3/SmO‐based CO2 splitting (Sm‐CS) cycle were formulated. The obtained results indicate that a higher quantity of solar energy input was needed to increase the percentage of partial TR of Sm2O3. The solar‐to‐fuel energy conversion efficiency (without heat recuperation) was first increased up to 9.13% for 50% of TR‐Sm and then decreased to 6.54% as the %TR‐Sm further enhanced to 100%. The application of heat recuperation was beneficial not only to increase the solar‐to‐fuel energy conversion efficiency but also to decrease the TR temperature required for the attainment of the maximum efficiency value. © 2020 Society of Chemical Industry and John Wiley & Sons, Ltd.
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