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Modulation of zeolite acidity by post-synthesis treatments in Mo/HZSM-5 catalysts for methane dehydroaromatization

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Modulation of zeolite acidity by post-synthesis treatments in Mo/HZSM-5 catalysts for methane dehydroaromatization

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dc.contributor.author Martinez Feliu, Agustin es_ES
dc.contributor.author Peris Chanzá, Ernesto José es_ES
dc.contributor.author Vidal Moya, José Alejandro es_ES
dc.date.accessioned 2016-04-25T08:34:28Z
dc.date.available 2016-04-25T08:34:28Z
dc.date.issued 2008
dc.identifier.issn 0167-2991
dc.identifier.uri http://hdl.handle.net/10251/62872
dc.description.abstract The acid properties of HZSM-5 were modulated by treatment with acids (oxalic, citric, nitric), (NH(4))(2)SiF(6), steaming, steaming+acid, and partial exchange with Cs(+). Then, catalysts containing 3wt% Mo were prepared by impregnation and evaluated for MDA at 700 degrees C. The materials were characterized by ICP, XRD, N(2) adsorption, FTIR-pyridine, NH(3)-TPD, and (27)Al MAS NMR. Depending on the particular treatment, the density of Bronsted acid sites (BAS) was modified to different extents and thus the Mo/H(+) balance in the final catalysts. Partial exchange with Cs(+) cations (Cs/Al= 0.07 at/at) drastically reduced coke formation and improved benzene selectivity by about 35% due to preferential neutralization of the strongest BAS. A notable improvement in the benzene/naphthalene ratio was also observed after treatment with oxalic and citric acids, steaming followed by HCl washing, and partial Cs(+) exchange. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Studies in Surface Science and Catalysis es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Methane Dehydroaromatization es_ES
dc.subject Mo/HZSM-5 es_ES
dc.subject Dealumination es_ES
dc.subject Acidity es_ES
dc.title Modulation of zeolite acidity by post-synthesis treatments in Mo/HZSM-5 catalysts for methane dehydroaromatization es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/S0167-2991(08)80072-9 es_ES
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.contributor.affiliation Universitat Politècnica de València. Instituto de Reconocimiento Molecular y Desarrollo Tecnológico - Institut de Reconeixement Molecular i Desenvolupament Tecnològic es_ES
dc.description.bibliographicCitation Martinez Feliu, A.; Peris Chanzá, EJ.; Vidal Moya, JA. (2008). Modulation of zeolite acidity by post-synthesis treatments in Mo/HZSM-5 catalysts for methane dehydroaromatization. Studies in Surface Science and Catalysis. 174B:1075-1080. doi:10.1016/S0167-2991(08)80072-9 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/S0167-2991(08)80072-9 es_ES
dc.description.upvformatpinicio 1075 es_ES
dc.description.upvformatpfin 1080 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 174B es_ES
dc.relation.senia 35432 es_ES


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