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Estimation of solar‐to‐fuel energy conversion efficiency of a solar driven samarium oxide‐based thermochemical CO 2 splitting cycle
Author(s) -
Bhosale Rahul R.
Publication year - 2020
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1979
Subject(s) - thermodynamics , thermochemical cycle , solar energy , energy conversion efficiency , oxide , chemistry , energy transformation , thermal efficiency , thermal , combustion , physics , catalysis , electrical engineering , hydrogen production , engineering , biochemistry , organic chemistry
Estimation of the solar‐to‐fuel energy conversion efficiency (with and without heat recuperation) of the Sm 2 O 3 /SmO‐based solar‐driven thermochemical CO 2 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 Sm 2 O 3 and the reoxidation of SmO via CO 2 splitting (CS) reaction were identified. The thermodynamic modeling equations and the process flow configuration for the Sm 2 O 3 /SmO‐based CO 2 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 Sm 2 O 3 . 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.