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Oxidative dehydrogenation of ethane over Ni-W-O mixed metal oxides catalysts

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Oxidative dehydrogenation of ethane over Ni-W-O mixed metal oxides catalysts

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dc.contributor.author Solsona Espriu, Benjamin Eduardo es_ES
dc.contributor.author López Nieto, José Manuel es_ES
dc.contributor.author Concepción Heydorn, Patricia es_ES
dc.contributor.author Dejoz, A. es_ES
dc.contributor.author Ivars Barceló, Francisco es_ES
dc.contributor.author Vazquez, M. I. es_ES
dc.date.accessioned 2016-10-14T12:14:17Z
dc.date.available 2016-10-14T12:14:17Z
dc.date.issued 2011-05-16
dc.identifier.issn 0021-9517
dc.identifier.uri http://hdl.handle.net/10251/71832
dc.description.abstract Ni-W-O mixed oxides were prepared through the evaporation of aqueous solutions of nickel nitrate and ammonium tungstate and calcined in air at 500 degrees C for 2 h. The catalysts were characterized by several techniques (N(2) adsorption, X-ray diffraction, temperature-programmed reduction, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy of adsorbed CO, and (18)O/(16)O isotope exchange) and tested in the oxidative dehydrogenation of ethane. The catalytic activity and catalyst reducibility decrease when the W content increases. Thus, nickel sites seem to be the active centers for ethane activation in these catalysts. However, the selectivity to ethylene strongly changes depending on the Ni/W ratio. In W-rich catalysts, in which NiWO(4) and WO(3) are mainly observed, a strong influence of ethane conversion on the selectivity to ethylene is observed. However, in Ni-rich catalysts, in which NiO crystallites and WO(x) nanoparticles are mainly observed, ethane conversion hardly influences the selectivity to ethylene. It has been demonstrated that the nature of the Ni sites and the characteristics and number of the acid sites determine the catalytic behavior of these catalysts. The presence of Lewis acid sites with high acid strength in W-rich catalysts facilitates the decomposition of ethylene during ethane oxidation. (C) 2011 Elsevier Inc. All rights reserved. es_ES
dc.description.sponsorship Financial support from DGICYT in Spain (Project CTQ-2009-14495) and Generalitat Valenciana (ACOMP/2010/091) is gratefully acknowledged. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation DGICYT in Spain CTQ-2009-14495 es_ES
dc.relation Generalitat Valenciana ACOMP/2010/091 es_ES
dc.relation.ispartof Journal of Catalysis es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Nickel tungsten metal oxide catalysts es_ES
dc.subject Oxidative dehydrogenation of ethane es_ES
dc.subject Ethylene oxidation es_ES
dc.subject Catalyst characterization es_ES
dc.subject XPS es_ES
dc.subject TPR es_ES
dc.subject XRD es_ES
dc.subject Raman es_ES
dc.subject FTIR of adsorbed CO es_ES
dc.subject Oxygen isotopic exchange es_ES
dc.title Oxidative dehydrogenation of ethane over Ni-W-O mixed metal oxides catalysts es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.jcat.2011.02.010
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto Universitario Mixto de Tecnología Química - Institut Universitari Mixt de Tecnologia Química es_ES
dc.description.bibliographicCitation Solsona Espriu, BE.; López Nieto, JM.; Concepción Heydorn, P.; Dejoz, A.; Ivars Barceló, F.; Vazquez, MI. (2011). Oxidative dehydrogenation of ethane over Ni-W-O mixed metal oxides catalysts. Journal of Catalysis. 280(1):28-39. doi:10.1016/j.jcat.2011.02.010 es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.jcat.2011.02.010 es_ES
dc.description.upvformatpinicio 28 es_ES
dc.description.upvformatpfin 39 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 280 es_ES
dc.description.issue 1 es_ES
dc.relation.senia 215029 es_ES


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