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Tungsten-Vanadium mixed oxides for the oxidehydration of glycerol into acrylic acid

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Tungsten-Vanadium mixed oxides for the oxidehydration of glycerol into acrylic acid

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dc.contributor.author Soriano Rodríguez, Mª Dolores es_ES
dc.contributor.author Concepción Heydorn, Patricia es_ES
dc.contributor.author López Nieto, José Manuel es_ES
dc.contributor.author Cavani, Fabrizio es_ES
dc.contributor.author Guidetti, Stefania es_ES
dc.contributor.author Trevisanut, C. es_ES
dc.date.accessioned 2013-07-15T07:31:56Z
dc.date.issued 2011
dc.identifier.issn 1463-9262
dc.identifier.uri http://hdl.handle.net/10251/31141
dc.description.abstract [EN] In this paper we report on the one-pot transformation of glycerol into acrylic acid, catalyzed by W/V mixed oxides, with hexagonal tungsten bronze (HTB) structure. The reaction requires two different catalyst functions, i.e., an acid one, which is given by W oxide, and an oxidizing one, given by the V ions incorporated within the WO3 lattice. W¿O bronze is very active and moderately selective in acrolein formation, but yields only traces of acrylic acid. The incorporation of increasing amounts of V inside the hexagonal tungsten bronze structure, with the development of a monophasic compound, allows the consecutive oxidation of acrolein into acrylic acid. An optimal atomic ratio between W and V equal to V/(W + V) = 0.12¿0.21 made it possible to obtain an acrylic acid yield of 25% (with selectivity to residual acrolein of 11%). However, during reaction under the oxygen-containing feed, the V4+ incorporated into the hexagonal bronze structure underwent a slow oxidation into V5+, which caused a progressive decline of selectivity to acrylic acid and a concomitant increase of COx formation; the hexagonal structure however was stable during lifetime experiments. On the other hand, in the absence of oxygen a very rapid deactivation of the catalyst occurred, with a decrease in selectivity to acrolein and increase in heavy by-products. es_ES
dc.description.sponsorship The Spanish authors would like to thank the DGICYT in Spain (Project CTQ2009-14495) for financial support. MIUR (Ministerro dell'Universita e della Ricerca) is acknowledged for the PhD grant to SG. M. D. S. thanks the Programa de Apoyo a la Investigacion y Desarrollo (PAID-00-10, Universidad Politecnica de Valencia, Spain) by concession of a short stay grant.
dc.language Inglés es_ES
dc.publisher Royal Society of Chemistry es_ES
dc.relation DGICYT/CTQ2009-14495 es_ES
dc.relation UPV/PAID-00-10 es_ES
dc.relation.ispartof Green Chemistry es_ES
dc.rights Reserva de todos los derechos es_ES
dc.title Tungsten-Vanadium mixed oxides for the oxidehydration of glycerol into acrylic acid es_ES
dc.type Artículo es_ES
dc.embargo.lift 10000-01-01
dc.embargo.terms forever es_ES
dc.identifier.doi 10.1039/c1gc15622e
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 Soriano Rodríguez, MD.; Concepción Heydorn, P.; López Nieto, JM.; Cavani, F.; Guidetti, S.; Trevisanut, C. (2011). Tungsten-Vanadium mixed oxides for the oxidehydration of glycerol into acrylic acid. Green Chemistry. 13(10):2954-2962. doi:10.1039/c1gc15622e es_ES
dc.description.accrualMethod Senia es_ES
dc.relation.publisherversion http://dx.doi.org/10.1039/c1gc15622e es_ES
dc.description.upvformatpinicio 2954 es_ES
dc.description.upvformatpfin 2962 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 13 es_ES
dc.description.issue 10 es_ES
dc.relation.senia 214443
dc.identifier.eissn 1463-9270
dc.contributor.funder Dirección General de Investigación Científica y Técnica
dc.contributor.funder Universitat Politècnica de València


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