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Título: | Reflux-synthesized bulk and diluted W-Nb-O mixed oxide bronzes for the valorization of short-chain oxygenates aqueous mixtures |
Autor: | Delgado Muñoz, Daniel; Fernández-Arroyo Naranjo, Alberto CSIC; Salvia, N.L.; Dómine, Marcelo Eduardo CSIC ORCID ; López Nieto, José Manuel CSIC ORCID | Fecha de publicación: | nov-2019 | Editor: | Elsevier BV | Citación: | Chinese Journal of Catalysis 40(11): 1778-1787 (2019) | Resumen: | This work reports the preparation of bulk and KIT-6-diluted W-Nb-O mixed oxide bronzes by a reflux method. The influence of the incorporation of Nb and a mesoporous silica on the physicochemical features of the catalysts is studied. The addition of Nb favors the formation of single-phase oxide bronze structure, with improved Lewis acidity; while the incorporation of KIT-6 gives rise to well-dispersed mixed metal oxide particles on the diluter. These diluted W-Nb-O catalysts present enhanced surface areas and mesopore volumes. The materials have been tested in the valorization of an aqueous model mixture (acetol/propanal/ethanol/acetic acid/water weight ratio of 5/25/10/30/30), through C-C bond formation reactions. The increase in the Lewis nature of surface acid sites stands as the key point to maximize the total organic yield during the reaction (C-C products). The best catalysts maintain their catalytic behavior after five consecutive uses. | Versión del editor: | http://dx.doi.org/10.1016/S1872-2067(19)63419-4 | URI: | http://hdl.handle.net/10261/206851 | DOI: | 10.1016/S1872-2067(19)63419-4 | Identificadores: | doi: 10.1016/S1872-2067(19)63419-4 issn: 1872-2067 |
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Paper W-Nb-O - Chin J Catal 2019 (10.1016-s1872-2067(19)63419-4).pdf | 3,28 MB | Adobe PDF | Visualizar/Abrir |
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