Y zeolite-supported niobium pentoxide catalysts for the glycerol acetalization reaction
| Autor: | Isabel C. Neves, C. Ferreira, Elisabetta Rombi, Miguel A. Bañares, Maria Giorgia Cutrufello, A. Araujo, Vanesa Calvino-Casilda, António M. Fonseca |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Hydrophobicity 02 engineering and technology 010402 general chemistry 01 natural sciences Catalysis Faujasite zeolite chemistry.chemical_compound Glycerol Nb(V) oxide General Materials Science Niobium pentoxide Zeolite Supplementary data Science & Technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Glycerol acetalization 0104 chemical sciences 3. Good health chemistry Impregnation method Mechanics of Materials 0210 nano-technology Nuclear chemistry |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1387-1811 |
| Popis: | Supplementary data related to this article can be found at http://dx. doi.org/10.1016/j.micromeso.2018.06.010. Faujasite zeolite-supported niobium-based catalysts (with Nb2O5 amounts of 5 and 15wt%) were prepared by impregnation of NaY, HY, and HUSY zeolites using a niobum(V) ammonium oxalate complex. These obtained Nb-containing catalysts were calcined and thoroughly characterized by different physico-chemical techniques. The characterization results revealed that niobium oxide was successfully loaded on the surface of the zeolite supports without any significant modification of the faujasite structure. Surface area and pore volume were found to decrease with the increase in the Nb content for all the prepared catalysts. The presence of Nb was proved to increase the hydrophobicity of the zeolites and to affect surface acidity. The catalytic activity of the Nb-containing samples was evaluated in the glycerol acetalization reaction, and the Nb-HUSY catalysts were found to show the best catalytic performance. A. Araujo and C. Ferreira thank the ERASMUS program for their grants. This work has been developed under the scope of the project BioTecNorte (operation NORTE-01-0145-FEDER-000004) supported by the Northern Portugal Regional Operational Programme (NORTE 2020), under the Portugal 2020 Partnership Agreement, through the European Regional Development Fund. This work has also been financed by national funds (FCT, Fundacao para a Ciencia e a Tecnologia.), through the projects PTDC/AAGTEC/5269/2014 and Center of Chemistry (UID/QUI/00686/2013 and UID/QUI/0686/ 2016). The authors also acknowledge funding from Spanish Ministry project CTQ2014-57578-R and CTM2017-82335-R and Comunidad de Madrid Alccones, S2013/MAE-2985. info:eu-repo/semantics/publishedVersion |
| Databáze: | OpenAIRE |
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