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Título: | Continuous catalytic process for the selective dehydration of glycerol over Cu-based mixed oxide |
Autor: | Mazarío, Jaime; Concepción, Patricia CSIC ORCID; Ventura, María; Dómine, Marcelo Eduardo CSIC ORCID | Fecha de publicación: | may-2020 | Editor: | Elsevier BV | Citación: | Journal of Catalysis 385: 160-175 (2020) | Resumen: | The selective dehydration of glycerol to hydroxyacetone (acetol) was studied with Cu-based mixed oxides derived from hydrotalcite as catalysts in a continuous flow fix-bed reactor. Catalysts were prepared by co-precipitation and characterized by ICP, N adsorption, XRD, NH-TPD, CO-TPD, TPR and TEM. Different parameters were investigated to develop the most appropriate material as well as to determine the function of every metallic species. The optimized Cu-Mg-AlO offered ≈60% acetol selectivity at >90% glycerol conversion (≈80% liquid yield, up to TOS = 9 h). The catalyst could be regenerated by calcination, achieving full activity recovery after five re-cycles. “In-situ” FTIR and XPS measurements evidenced that the presence of Cu, specially the most active Cu species, was essential to carry out the dehydration to acetol with high reaction rates, and to form the preferred intermediate (with C[dbnd]O group); although a minor contribution from Cu and Cu species could not be discarded. | Versión del editor: | http://dx.doi.org/10.1016/j.jcat.2020.03.010 | URI: | http://hdl.handle.net/10261/231345 | DOI: | 10.1016/j.jcat.2020.03.010 | Identificadores: | doi: 10.1016/j.jcat.2020.03.010 issn: 1090-2694 |
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