LAPSE:2018.1008
Published Article
LAPSE:2018.1008
Solar Hydrogen Production via a Samarium Oxide-Based Thermochemical Water Splitting Cycle
Rahul Bhosale, Anand Kumar, Fares AlMomani, Ujjal Ghosh, Mohammad Saad Anis, Konstantinos Kakosimos, Rajesh Shende, Marc A. Rosen
November 27, 2018
The computational thermodynamic analysis of a samarium oxide-based two-step solar thermochemical water splitting cycle is reported. The analysis is performed using HSC chemistry software and databases. The first (solar-based) step drives the thermal reduction of Sm₂O₃ into Sm and O₂. The second (non-solar) step corresponds to the production of H₂ via a water splitting reaction and the oxidation of Sm to Sm₂O₃. The equilibrium thermodynamic compositions related to the thermal reduction and water splitting steps are determined. The effect of oxygen partial pressure in the inert flushing gas on the thermal reduction temperature (TH) is examined. An analysis based on the second law of thermodynamics is performed to determine the cycle efficiency (ηcycle) and solar-to-fuel energy conversion efficiency (ηsolar−to−fuel) attainable with and without heat recuperation. The results indicate that ηcycle and ηsolar−to−fuel both increase with decreasing TH, due to the reduction in oxygen partial pressure in the inert flushing gas. Furthermore, the recuperation of heat for the operation of the cycle significantly improves the solar reactor efficiency. For instance, in the case where TH = 2280 K, ηcycle = 24.4% and ηsolar−to−fuel = 29.5% (without heat recuperation), while ηcycle = 31.3% and ηsolar−to−fuel = 37.8% (with 40% heat recuperation).
Keywords
computational analysis, Hydrogen, samarium oxide, solar thermochemical, thermodynamics, water splitting
Suggested Citation
Bhosale R, Kumar A, AlMomani F, Ghosh U, Saad Anis M, Kakosimos K, Shende R, Rosen MA. Solar Hydrogen Production via a Samarium Oxide-Based Thermochemical Water Splitting Cycle. (2018). LAPSE:2018.1008
Author Affiliations
Bhosale R: Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha 2713, Qatar
Kumar A: Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha 2713, Qatar
AlMomani F: Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha 2713, Qatar [ORCID]
Ghosh U: Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha 2713, Qatar [ORCID]
Saad Anis M: Department of Chemical Engineering, College of Engineering, Qatar University, P. O. Box 2713, Doha 2713, Qatar
Kakosimos K: Department of Chemical Engineering, Texas A&M University at Qatar, PO Box 23874, Doha 2713, Qatar [ORCID]
Shende R: Department of Chemical and Biological Engineering, South Dakota School of Mines and Technology, Rapid City, SD 57701-3995, USA
Rosen MA: Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, 2000 Simcoe St. North, Oshawa, ON L1H 7K4, Canada [ORCID]
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Journal Name
Energies
Volume
9
Issue
5
Article Number
E316
Year
2016
Publication Date
2016-04-25
Published Version
ISSN
1996-1073
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PII: en9050316, Publication Type: Journal Article
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LAPSE:2018.1008
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doi:10.3390/en9050316
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Nov 27, 2018
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Calvin Tsay
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