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Influence of post-synthetic modifications on the composition, acidity and textural properties of ZSM-22 zeolite

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Influence of post-synthetic modifications on the composition, acidity and textural properties of ZSM-22 zeolite

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dc.contributor.author Del Campo Huertas, Pablo es_ES
dc.contributor.author Beato, P. es_ES
dc.contributor.author Rey Garcia, Fernando es_ES
dc.contributor.author Navarro, María Teresa es_ES
dc.contributor.author Olsbye, Unni es_ES
dc.contributor.author Lillerud, K.P. es_ES
dc.contributor.author Svelle, S. es_ES
dc.date.accessioned 2020-05-20T03:01:52Z
dc.date.available 2020-05-20T03:01:52Z
dc.date.issued 2018-01 es_ES
dc.identifier.issn 0920-5861 es_ES
dc.identifier.uri http://hdl.handle.net/10251/143789
dc.description.abstract [EN] In this work, an extensive investigation of the preparation of a large body of desilicated ZSM-22 zeolites and their basic characterization is presented. We investigate the effects of the properties of the starting zeolite, and we employ mixtures of NaOH with CTAB or TBAOH as well as subsequent acid washings to create mesoporous zeolites. Scanning and transmission electron microscopy and nitrogen adsorption revealed that the cristal morphology of the starting zeolite appears to be the dominant parameter which influences the mesopore generation. Mesopores were effectively created within the rod-like commercial crystallites, whereas the thinner dimensions of the needle-shaped particles of the lab-made zeolite represent an obstacle for an intra-mesopore creation. The alkaline, surfactant-assisted or combined NaOH/TBAOH desilication methods resulted in mesopores with different shape and size from the commercial zeolite. The sequential acid washing generally resulted in increased micropore volume with respect to the desilicated samples. Elemental analysis showed that extra-framework Al species were generated upon the desilication treatments, which are eventually removed by the acid treatment. The acidity studied by FTIR demonstrated that this occurs without a marked modification of the Brønsted acidity, whereas the concentration of surface silanol hydroxyl groups is increased. The comparison between the total Al concentration and the amount of Al in acidic sites quantified by pyridine adsorption shows that the acidity was recovered after the acid washing and suggests that original non-acidic Al species in the starting materials may have a role in the formation of both Lewis and extra-framework species upon desilication. es_ES
dc.description.sponsorship This publication is a part of the inGAP Centre of research-based Innovation, which receives financial support from the Norwegian Research Council under contract no. 174893. F.R and M.T.N thank to MINECO for financial support through projects MAT2015-71842-P and SEV-2012-0267. All the authors thank the Electron Microscopy Service of the Universitat Politecnica de Valencia. es_ES
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Catalysis Today es_ES
dc.rights Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) es_ES
dc.subject Zeolite ZSM-22 es_ES
dc.subject Mesoporous es_ES
dc.subject Desilication es_ES
dc.subject Post-synthetic es_ES
dc.subject Crystal morphology es_ES
dc.title Influence of post-synthetic modifications on the composition, acidity and textural properties of ZSM-22 zeolite es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.cattod.2017.04.042 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/RCN//174893/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//SEV-2012-0267/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//MAT2015-71842-P/ES/SINTESIS Y CARACTERIZACION AVANZADA DE NUEVOS MATERIALES ZEOLITICOS Y APLICACIONES EN ADSORCION, MEDIOAMBIENTE Y EN LA CONSERVACION DE ALIMENTOS/ es_ES
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 Del Campo Huertas, P.; Beato, P.; Rey Garcia, F.; Navarro, MT.; Olsbye, U.; Lillerud, K.; Svelle, S. (2018). Influence of post-synthetic modifications on the composition, acidity and textural properties of ZSM-22 zeolite. Catalysis Today. 299:120-134. https://doi.org/10.1016/j.cattod.2017.04.042 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.1016/j.cattod.2017.04.042 es_ES
dc.description.upvformatpinicio 120 es_ES
dc.description.upvformatpfin 134 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 299 es_ES
dc.relation.pasarela S\358217 es_ES
dc.contributor.funder Research Council of Norway es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES
dc.contributor.funder European Regional Development Fund es_ES


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