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dc.contributor.authorCastedo Rodríguez, Alejandra
dc.contributor.authorCasanovas Grau, Albert
dc.contributor.authorAngurell Purroy, Inmaculada
dc.contributor.authorSoler Turu, Lluís
dc.contributor.authorLlorca Piqué, Jordi
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Tècniques Energètiques
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2018-05-17T09:08:20Z
dc.date.issued2018-06-15
dc.identifier.citationCastedo, A., Casanovas, A., Angurell, I., Soler, L., Llorca, J. Effect of temperature on the gas-phase photocatalytic H2 generation using microreactors under UVA and sunlight irradiation. "Fuel (Guildford)", 15 Juny 2018, vol. 222, p. 327-333.
dc.identifier.issn0016-2361
dc.identifier.urihttp://hdl.handle.net/2117/117309
dc.description.abstractThe effect of temperature on the photocatalytic hydrogen generation from a gaseous water-ethanol mixture has been tested in a silicone microreactor containing nine microchannels of 500 µm (width) × 1 mm (depth) × 47 mm (length) coated with Au/TiO2photocatalyst under UVA irradiation. Kinetic analyses have indicated that the hydrogen production rate follows the Langmuir-Hinshelwood model. The effect of temperature from 298 to 348 K has been determined by thermodynamic parameters, such as enthalpy (¿H¿), entropy (¿S¿) and Gibbs free energy (¿G¿) of activation, using the transition state theory (TST). The apparent rate constants (kapp) are higher by increasing the temperature, and the activation energy has been determined to be 24 ± 1 kJ·mol-1. In order to evaluate if solar concentration could be used to enhance the photoproduction of hydrogen, the reaction has also been conducted under direct sunlight using a solar concentrator of about 1 m in diameter. Finally, the microreactor has been scaled out by a factor of ca. 10 to a device containing thirty-two microchannels of 500 µm (width) × 1 mm (depth) × 117.5 mm (length). The specific (i.e. per irradiated area of catalyst) hydrogen production rates of both microreactors using sunlight are very similar suggesting that this technology could lead to viable solar hydrogen production.
dc.format.extent7 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Energies
dc.subjectÀrees temàtiques de la UPC::Energies::Recursos energètics renovables
dc.subject.lcshHydrogen as fuel
dc.subject.lcshThermodynamics
dc.subject.lcshRenewable energy sources
dc.subject.otherGas-phase photocatalysis
dc.subject.otherHydrogen production
dc.subject.otherMicroreactor
dc.subject.otherRenewable energy
dc.subject.otherSolar-to-hydrogen
dc.titleEffect of temperature on the gas-phase photocatalytic H2 generation using microreactors under UVA and sunlight irradiation
dc.typeArticle
dc.subject.lemacHidrogen com a combustible
dc.subject.lemacTermodinàmica
dc.subject.lemacEnergies renovables
dc.contributor.groupUniversitat Politècnica de Catalunya. NEMEN - Nanoenginyeria de materials aplicats a l'energia
dc.identifier.doi10.1016/j.fuel.2018.02.128
dc.relation.publisherversionhttps://www.sciencedirect.com/science/article/pii/S0016236118303119?via%3Dihub
dc.rights.accessRestricted access - publisher's policy
drac.iddocument22028519
dc.description.versionPostprint (author's final draft)
dc.date.lift2020-06-15
upcommons.citation.authorCastedo, A., Casanovas, A., Angurell, I., Soler, L., Llorca, J.
upcommons.citation.publishedtrue
upcommons.citation.publicationNameFuel (Guildford)
upcommons.citation.volume222
upcommons.citation.startingPage327
upcommons.citation.endingPage333


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