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Study of the hydrogen production step of the Mn2O3/MnO thermochemical cycle

dc.contributor.authorMarugán, Javier
dc.contributor.authorBotas, Juan A.
dc.contributor.authorMolina, Raúl
dc.contributor.authorHerradón, Carolina
dc.date.accessioned2014-04-23T10:19:59Z
dc.date.available2014-04-23T10:19:59Z
dc.date.issued2014
dc.identifier.citationSTUDY OF THE HYDROGEN PRODUCTION STEP OF THE Mn2O3/MnO THERMOCHEMICAL CYCLE. Javier Marugán, Juan A. Botas, Raúl Molina, Carolina Herradón. International Journal of Hydrogen Energy 39 (2014) 5274-5282es
dc.identifier.issn0360-3199
dc.identifier.urihttp://hdl.handle.net/10115/12280
dc.descriptionLínea 5. Producción de hidrógenoes
dc.description.abstractIn this work, a complete study of the second step of the Mn2O3/MnO thermochemical cycle for solar hydrogen production has been performed. It includes a complete thermodynamic calculation of the equilibrium phases between MnO, NaOH and H2, which shows that the reaction takes place theoretically at temperatures above 75 ºC. However, the experimental results demonstrate that it is necessary at least 450 ºC to achieve a satisfactory reaction rate. It indicates a dramatic influence of chemical kinetics and diffusion process, displacing the reaction to higher temperatures than those predicted by thermodynamics. The resultant solid of the reaction exhibits a phases distribution highly dependent on the temperature and the NaOH:MnO ratio and this is of great influence in the overall rate of the process. The kinetic study shows that the overall process involves not only the chemical reaction between MnO and NaOH, but also a number of physical processes (heat and mass transfer) and solid phase transformations. The apparent activation energy calculated is a composite value determined by the activation energies of those elementary processes.es
dc.language.isoenges
dc.publisherElsevieres
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/*
dc.subjectEnergíaes
dc.subjectThermochemical water splittinges
dc.subjectHydrogen productiones
dc.subjectManganese oxidees
dc.subjectThermodynamicses
dc.subjectKineticsupes
dc.titleStudy of the hydrogen production step of the Mn2O3/MnO thermochemical cyclees
dc.typeinfo:eu-repo/semantics/articlees
dc.identifier.doi10.1016/j.ijhydene.2013.11.112es
dc.rights.accessRightsinfo:eu-repo/semantics/openAccesses
dc.subject.unesco2303.14 Hidrogenoes
dc.description.departamentoTecnología Química y Energética


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Atribución-NoComercial-SinDerivadas 3.0 EspañaExcept where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España