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Study of the first step of the Mn2O3/MnO thermochemical cycle for solar hydrogen production

dc.contributor.authorMarugán, Javier
dc.contributor.authorBotas, Juan A.
dc.contributor.authorMartín, Mariana
dc.contributor.authorMolina, Raúl
dc.contributor.authorHerradón, Carolina
dc.date.accessioned2012-04-10T13:48:05Z
dc.date.available2012-04-10T13:48:05Z
dc.date.issued2012-04
dc.identifier.citationStudy of the first step of the Mn2O3/MnO thermochemical cycle for solar hydrogen production. Javier Marugán, Juan A. Botas*, Mariana Martín, Raúl Molina, Carolina Herradón. International Journal of Hydrogen Energy 37 (2012) 7017-7025es
dc.identifier.issn0360-3199
dc.identifier.urihttp://hdl.handle.net/10115/6050
dc.descriptionLínea Investigación: 5. Producción de hidrógenoes
dc.description.abstractIn this work, a complete thermodynamic study of the first step of the Mn2O3/MnO thermochemical cycle for solar hydrogen production has been performed. The thermal reduction of Mn2O3 takes place through a sequential mechanism of two reaction steps. The first step (reduction of Mn2O3 to Mn3O4) takes place at temperatures above 700 ºC, whereas the second reaction step (reduction of Mn3O4 to MnO) requires temperatures above 1350 ºC to achieve satisfactory reaction rates and conversions. Equilibrium can be displaced to lower temperatures by increasing the inert gas/Mn2O3 ratio or decreasing the pressure. The thermodynamic calculations have been validated by thermogravimetric experiments carried out in a high temperature tubular furnace. Experimental results corroborate the theoretical predictions although a dramatically influence of chemical kinetics and diffusion process has been also demonstrated, displacing the reactions to higher temperatures than those predicted by thermodynamics. Finally, this work demonstrates that the first step of the manganese oxide thermochemical cycle for hydrogen production can be carried out with total conversion at temperatures compatible with solar energy concentration devices. The range of required temperatures is lower than those commonly reported in literature for the manganese oxide cycle obtained from theoretical and thermodynamic studies.es
dc.language.isoenges
dc.publisherELSEVIERes
dc.relation.ispartofseriesdoi:10.1016/j.ijhydene.2011.10.124
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectEnergías Alternativases
dc.subjectThermochemical water splittinges
dc.subjectHydrogen productiones
dc.subjectManganese oxidees
dc.titleStudy of the first step of the Mn2O3/MnO thermochemical cycle for solar hydrogen productiones
dc.typeinfo:eu-repo/semantics/articlees
dc.identifier.doi10.1016/j.ijhydene.2011.10.124es
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.subject.unesco23 Químicaes
dc.description.departamentoTecnología Química y Energética


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