CeO2-promoted Ni/activated carbon catalysts for the water–gas shift (WGS) reaction

Please use this identifier to cite or link to this item: http://hdl.handle.net/10045/46293
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dc.contributorMateriales Avanzadoses
dc.contributor.authorPastor Pérez, Laura-
dc.contributor.authorBuitrago Sierra, Robison-
dc.contributor.authorSepúlveda-Escribano, Antonio-
dc.contributor.otherUniversidad de Alicante. Departamento de Química Inorgánicaes
dc.contributor.otherUniversidad de Alicante. Instituto Universitario de Materialeses
dc.date.accessioned2015-04-22T09:20:57Z-
dc.date.available2015-04-22T09:20:57Z-
dc.date.issued2014-10-22-
dc.identifier.citationInternational Journal of Hydrogen Energy. 2014, 39(31): 17589-17599. doi:10.1016/j.ijhydene.2014.08.089es
dc.identifier.issn0360-3199 (Print)-
dc.identifier.issn1879-3487 (Online)-
dc.identifier.urihttp://hdl.handle.net/10045/46293-
dc.description.abstractThe low temperature water–gas shift (WGS) reaction has been studied over carbon-supported nickel catalysts promoted by ceria. To this end, cerium oxide has been dispersed (at different loadings: 10, 20, 30 and 40 wt.%) on the activated carbon surface with the aim of obtaining small ceria particles and a highly available surface area. Furthermore, carbon- and ceria-supported nickel catalysts have also been studied as references. A combination of N2 adsorption analysis, powder X-ray diffraction, temperature-programmed reduction with H2, X-ray photoelectron spectroscopy and TEM analysis were used to characterize the Ni–CeO2 interactions and the CeO2 dispersion over the activated carbon support. Catalysts were tested in the low temperature WGS reaction with two different feed gas mixtures: the idealized one (with only CO and H2O) and a slightly harder one (with CO, CO2, H2, and H2O). The obtained results show that there is a clear effect of the ceria loading on the catalytic activity. In both cases, catalysts with 20 and 10 wt.% CeO2 were the most active materials at low temperature. On the other hand, Ni/C shows a lower activity, this assessing the determinant role of ceria in this reaction. Methane, a product of side reactions, was observed in very low amounts, when CO2 and H2 were included in the WGS feed. Nevertheless, our data indicate that the methanation process is mainly due to CO2, and no CO consumption via methanation takes place at the relevant WGS temperatures. Finally, a stability test was carried out, obtaining CO conversions greater than 40% after 150 h of reaction.es
dc.description.sponsorshipFinancial support of Ministerio de Ciencia e Innovación of Spain (Project MAT2010-21147) is gratefully acknowledged. L.P.P. acknowledges her grant BES-2011-0406508.es
dc.languageenges
dc.publisherElsevieres
dc.rights© 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd.es
dc.subjectNies
dc.subjectCeO2es
dc.subjectActivated carbones
dc.subjectWGSes
dc.subjectLow temperaturees
dc.subject.otherQuímica Inorgánicaes
dc.titleCeO2-promoted Ni/activated carbon catalysts for the water–gas shift (WGS) reactiones
dc.typeinfo:eu-repo/semantics/articlees
dc.peerreviewedsies
dc.identifier.doi10.1016/j.ijhydene.2014.08.089-
dc.relation.publisherversionhttp://dx.doi.org/10.1016/j.ijhydene.2014.08.089es
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccesses
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