dc.creator | Rodríguez Gómez, Alberto | es |
dc.creator | Caballero Martínez, Alfonso | es |
dc.date.accessioned | 2022-10-24T10:51:16Z | |
dc.date.available | 2022-10-24T10:51:16Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Rodríguez Gómez, A. y Caballero Martínez, A. (2018). Bimetallic Ni-Co/SBA-15 catalysts for reforming of ethanol: How cobalt modifies the nickel metal phase and product distribution. Molecular Catalysis, 449, 122-130. https://doi.org/10.1016/j.mcat.2018.02.011. | |
dc.identifier.issn | 2468-8231 | es |
dc.identifier.uri | https://hdl.handle.net/11441/138269 | |
dc.description.abstract | In this study, five mono and bimetallic xNi-(10-x)Co/SBA-15 catalysts (x = 10, 8, 5, 2 and 0, with a total metallic
content of 10 wt%) have been synthesized using a deposition-precipitation (DP) methodology. Catalytic per-
formances on the steam reforming of ethanol reaction (SRE) have been determined and correlated with their
physical and chemical state. A nickel content of 5% or higher yields catalytic systems with good activity, high
selectivity to hydrogen and a low production of acetaldehyde (less than 5%). However, in the systems where the
cobalt is the main component of the metallic phase (8–10%), the selectivity changes, mainly due to the pro-
duction of an excess of acetaldehyde, which is also reflected in the larger H2/CO2 ratio. In agreement with
previous findings, this important modification in the selectivity comes from the formation of a cobalt carbide
phase, where only takes place in the cobalt enriched systems, and is inhibited with nickel content larger than 5%.
The formation of this carbide phase seems to be responsible for the decrease of cobalt particle size during the
SRE reaction. Even though this cobalt carbide phase is thermodynamically metastable against decomposition to
metallic cobalt and graphite carbon, our results have shown that it only reacts and decomposes after a hydrogen
treatment at 600 °C. | es |
dc.description.sponsorship | Ministerio de Economía y Competitividad de España-CTQ2014-60524-R y ENE2017-88818-C2-1-R | es |
dc.format | application/pdf | es |
dc.format.extent | 9 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Molecular Catalysis, 449, 122-130. | |
dc.rights | Atribución-NoComercial-CompartirIgual 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-sa/4.0/ | * |
dc.subject | Nickel cobalt catalysts | es |
dc.subject | In situ XPS | es |
dc.subject | Hydrogen production | es |
dc.subject | Cobalt carbide | es |
dc.subject | Ethanol steam reforming | es |
dc.subject | Acetaldehyde | es |
dc.title | Bimetallic Ni-Co/SBA-15 catalysts for reforming of ethanol: How cobalt modifies the nickel metal phase and product distribution | es |
dc.type | info:eu-repo/semantics/article | es |
dc.type.version | info:eu-repo/semantics/acceptedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Química Inorgánica | es |
dc.relation.projectID | CTQ2014-60524-R | es |
dc.relation.projectID | ENE2017-88818-C2-1-R | es |
dc.relation.publisherversion | https://doi.org/10.1016/j.mcat.2018.02.011 | es |
dc.identifier.doi | 10.1016/j.mcat.2018.02.011 | es |
dc.journaltitle | Molecular Catalysis | es |
dc.publication.volumen | 449 | es |
dc.publication.initialPage | 122 | es |
dc.publication.endPage | 130 | es |
dc.contributor.funder | Ministerio de Economía y Competitividad (MINECO). España | es |