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dc.contributor.author | Rodríguez-Fernández, Aida | es_ES |
dc.contributor.author | Llopis Alonso, Francisco J. | es_ES |
dc.contributor.author | Martínez, Cristina | es_ES |
dc.contributor.author | Moliner Marin, Manuel | es_ES |
dc.contributor.author | Corma Canós, Avelino | es_ES |
dc.date.accessioned | 2020-09-12T03:35:21Z | |
dc.date.available | 2020-09-12T03:35:21Z | |
dc.date.issued | 2018-09-01 | es_ES |
dc.identifier.issn | 1387-1811 | es_ES |
dc.identifier.uri | http://hdl.handle.net/10251/149962 | |
dc.description.abstract | [EN] Extra-large pore ITQ-33 zeolite (ITT, 18 x 10 x 10-rings) is a very promising catalyst for the catalytic cracking of gasoil but, unfortunately, this material shows a limited hydrothermal stability due to the large germanium content present in the ITQ-33 structure. Taking this into account, the Ge-containing ITQ-33 has been post synthetically modified using different acid procedures with the aim of studying the effect of these treatments on the overall hydrothermal stability of this extra-large pore zeolite. In this sense, the as-prepared ITQ-33 has been treated with different HCl solutions in ethanol (from 0.1 to 1 M), containing also tetraethylorthosilicate (TEOS) as silicon precursor, at different temperatures (150-175 degrees C). From the different acid treatments, it is observed that treating ITQ-33 with a TEOS-containing 1 M HCl solution in ethanol at 150 degrees C for 24 h, allows increasing the Si/Ge ratio from 2 to 3.2, mostly preserving the crystalline structure. If this acid-treatment is repeated three consecutive times, the Si/Ge can be increased up to 7.5, resulting in a highly stable extra-large pore zeolite. This post-synthetically modified ITQ-33 zeolite has been characterized by different techniques, including PXRD, FESEM, N-2 and Ar adsorption, ICP and Al-27 MAS NMR to unravel its physico-chemical properties. Finally, the catalytic behavior of the treated ITQ-33 zeolite has been tested for the catalytic cracking of gasoil, confirming in this way a remarkably higher hydrothermal stability when compared to the as-prepared Ge-rich ITQ-33, permitting its regeneration for successive catalytic cycles. | es_ES |
dc.description.sponsorship | This work has been supported by the Spanish Government-MINECO through "Severo Ochoa" (SEV-2016-0683), MAT2015-71261-R, and CTQ2015-70126-R, and by the Fundacion Ramon Areces through a research contract of the "Life and Materials Science" program. The authors thank Eva M. Briz for technical assistance. | es_ES |
dc.language | Inglés | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.ispartof | Microporous and Mesoporous Materials | es_ES |
dc.rights | Reconocimiento - No comercial - Sin obra derivada (by-nc-nd) | es_ES |
dc.subject | Extra-large pore zeolite | es_ES |
dc.subject | Germanium,Isomorphic substitution | es_ES |
dc.subject | Catalytic cracking of gasoil | es_ES |
dc.subject.classification | QUIMICA ORGANICA | es_ES |
dc.title | Increasing the stability of the Ge-containing extra-large pore ITQ-33 zeolite by post-synthetic acid treatments | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1016/j.micromeso.2018.03.006 | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//MAT2015-71261-R/ES/DISEÑO RACIONAL DE MATERIALES ZEOLITICOS CON CENTROS METALICOS PARA SU APLICACION EN PROCESOS QUIMICOS SOSTENIBLES, MEDIOAMBIENTALES Y ENERGIAS RENOVABLES/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//CTQ2015-70126-R/ES/DISEÑO DE CATALIZADORES ZEOLITICOS PARA LA OPTIMIZACION DE PROCESOS QUIMICOS DE INTERES INDUSTRIAL/ | es_ES |
dc.relation.projectID | info:eu-repo/grantAgreement/MINECO//SEV-2016-0683/ | es_ES |
dc.rights.accessRights | Abierto | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Química - Departament de Química | 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 | Rodríguez-Fernández, A.; Llopis Alonso, FJ.; Martínez, C.; Moliner Marin, M.; Corma Canós, A. (2018). Increasing the stability of the Ge-containing extra-large pore ITQ-33 zeolite by post-synthetic acid treatments. Microporous and Mesoporous Materials. 267:35-42. https://doi.org/10.1016/j.micromeso.2018.03.006 | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | https://doi.org/10.1016/j.micromeso.2018.03.006 | es_ES |
dc.description.upvformatpinicio | 35 | es_ES |
dc.description.upvformatpfin | 42 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 267 | es_ES |
dc.relation.pasarela | S\383403 | es_ES |
dc.contributor.funder | Fundación Ramón Areces | es_ES |
dc.contributor.funder | Ministerio de Economía y Competitividad | es_ES |