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AuthorBhosale, Rahul
AuthorKumar, Anand
AuthorAlmomani, Fares
Available date2021-06-24T06:47:11Z
Publication Date2016
Publication NameInternational Journal of Photoenergy
ResourceScopus
ISSN1110662X
URIhttp://dx.doi.org/10.1155/2016/9727895
URIhttp://hdl.handle.net/10576/20853
AbstractThe computational thermodynamic modeling of the terbium oxide based two-step solar thermochemical water splitting (Tb-WS) cycle is reported. The 1st step of the Tb-WS cycle involves thermal reduction of TbO2 into Tb and O2, whereas the 2nd step corresponds to the production of H2 through Tb oxidation by water splitting reaction. Equilibrium compositions associated with the thermal reduction and water splitting steps were determined via HSC simulations. Influence of oxygen partial pressure in the inert gas on thermal reduction of TbO2 and effect of water splitting temperature (TL) on Gibbs free energy related to the H2 production step were examined in detail. The cycle (ηcycle) and solar-to-fuel energy conversion (ηsolar-to-fuel) efficiency of the Tb-WS cycle were determined by performing the second-law thermodynamic analysis. Results obtained indicate that ηcycle and ηsolar-to-fuel increase with the decrease in oxygen partial pressure in the inert flushing gas and thermal reduction temperature (TH). It was also realized that the recuperation of the heat released by the water splitting reactor and quench unit further enhances the solar reactor efficiency. At TH=2280 K, by applying 60% heat recuperation, maximum ηcycle of 39.0% and ηsolar-to-fuel of 47.1% for the Tb-WS cycle can be attained.
SponsorThe authors gratefully acknowledge the financial support provided by the Qatar University Internal Grant (QUUGCENG-CHE-14/15-10).
Languageen
PublisherHindawi Limited
SubjectWater Splitting
Fuel Production
Synthesis Gas
TitleSolar Thermochemical Hydrogen Production via Terbium Oxide Based Redox Reactions
TypeArticle
Volume Number2016
dc.accessType Open Access


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