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Operando XAS and Raman study of the structure of supported vanadium oxide during the oxidation of H2S to sulphur

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Operando XAS and Raman study of the structure of supported vanadium oxide during the oxidation of H2S to sulphur

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dc.contributor.author Holgado, J. P. es_ES
dc.contributor.author Soriano Rodríguez, Mª Dolores es_ES
dc.contributor.author Jimenez-Jimenez, J. es_ES
dc.contributor.author Concepción Heydorn, Patricia es_ES
dc.contributor.author Jimenez-Lopez, A. es_ES
dc.contributor.author Caballero, A. es_ES
dc.contributor.author Rodriguez-Castellon, E. es_ES
dc.contributor.author López Nieto, José Manuel es_ES
dc.date.accessioned 2016-05-12T10:33:16Z
dc.date.available 2016-05-12T10:33:16Z
dc.date.issued 2010-10-15
dc.identifier.issn 0920-5861
dc.identifier.uri http://hdl.handle.net/10251/63961
dc.description.abstract [EN] The modification of crystalline phases of a vanadium oxide supported on mesoporous zirconium phosphate during the partial oxidation of H2S to sulphur has been studied by using an operando Raman-GC approach and XAS in reaction conditions. The catalyst, mainly presenting crystalline V2O5, is transformed during the oxidation of H2S at 200 degrees C, presenting crystals of V4O9, which is identified by the presence of a band at ca. 900 cm(-1) in the Raman spectra (using a 785 nm line of an Argon ion laser) and by the presence of a pre-edge at 5469.8 eV (and a main-edge at 5482.2 eV) in XANES spectra. At the same time, it is observed a high conversion of H2S to sulphur (the main reaction product) and SO2 (as minority). Both activity and selectivity depend on the time on stream. In this way, the selectivity to SO2 decreases from ca. 5 to 1% with the time on stream. This change could be explained on the basis of the nature of V-species: the initial presence of V5+-O-V5+ pairs and the appearance of V5+-O-V4+ pairs at high time on stream. (C) 2010 Elsevier B. V. All rights reserved. es_ES
dc.description.sponsorship The authors gratefully acknowledge financial support from CICYT, Spain (NAN20004-09267-C03-01 and NAN2004-09267C03-02). We also thank Swiss Light Source (SLS) at the Paul Scherrer Institut (Proposal 20081090).
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation CICYT/NAN20004-09267-C03-01 es_ES
dc.relation CICYT/NAN2004-09267C03-02 es_ES
dc.relation.ispartof Catalysis Today es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Operando es_ES
dc.subject RAMAN es_ES
dc.subject EXAFS es_ES
dc.subject XANES es_ES
dc.subject Partial oxidation of hydrogen sulphide es_ES
dc.subject Vanadium oxides supported on es_ES
dc.subject mesoporous zirconium phosphate es_ES
dc.title Operando XAS and Raman study of the structure of supported vanadium oxide during the oxidation of H2S to sulphur es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.cattod.2010.02.050
dc.rights.accessRights Abierto 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 Holgado, JP.; Soriano Rodríguez, MD.; Jimenez-Jimenez, J.; Concepción Heydorn, P.; Jimenez-Lopez, A.; Caballero, A.; Rodriguez-Castellon, E.... (2010). Operando XAS and Raman study of the structure of supported vanadium oxide during the oxidation of H2S to sulphur. Catalysis Today. 155(3-4):296-301. doi:10.1016/j.cattod.2010.02.050 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.cattod.2010.02.050 es_ES
dc.description.upvformatpinicio 296 es_ES
dc.description.upvformatpfin 301 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 155 es_ES
dc.description.issue 3-4 es_ES
dc.relation.senia 40973 es_ES
dc.contributor.funder Comisión Interministerial de Ciencia y Tecnología


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