Artículo
Gas-phase hydrogenation of furfural to furfuryl alcohol over Cu-ZnO-Al2O3 catalysts prepared from layered double hydroxides
Bertolini, Guillermo Ramon
; Jiménez Gómez, Carmen P.; Cecilia, Juan Antonio; Maireles Torres, Pedro
Fecha de publicación:
29/04/2020
Editorial:
Molecular Diversity Preservation International
Revista:
Catalysts
ISSN:
2073-4344
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Several layered double hydroxides (LDHs) with general chemical composition (Cu,Zn)1−x Alx (OH)2 (CO3)x/2·mH2 O have been synthesized by the co-precipitation method, maintaining a (M2+ /M3+) molar ratio of 3, and varying the Cu2+ /Zn2+ molar ratio between 0.2 and 6.0. After calcination and reduction steps, Cu/ZnO/Al2 O3 catalysts were synthesized. These catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), H2 thermoprogrammed reduction (H2-TPR), N2 adsorption-desorption at −196◦ C, N2 O titration, X-ray photoelectron miscroscopy (XPS), NH3-thermoprogramed desorption (NH3-TPD) and CO2-thermoprogrammed desorption (CO2-TPD). The characterization data revealed that these catalysts are mainly meso-and macroporous, where Cu, ZnO and Al2 O3 are well dispersed. The catalytic results show that these catalysts are active in the gas-phase hydrogenation of furfural, being highly selective to furfuryl alcohol (FOL) and reaching the highest FOL yield for the catalyst with a Cu2+ /Zn2+ molar ratio of 1. In an additional study, the influence of the aging time on the synthesis of the LDHs was also evaluated. The catalytic data revealed that the use of shorter aging time in the formation of the LDH has a beneficial effect on the catalytic behavior, since more disordered structures with a higher amount of available Cu sites is obtained, leading to a higher yield towards FOL (71% after 5 h of time-on-stream at 210◦ C).
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Articulos(CINDECA)
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Articulos de CENTRO DE INV EN CS.APLICADAS "DR.JORGE J.RONCO"
Citación
Bertolini, Guillermo Ramon; Jiménez Gómez, Carmen P.; Cecilia, Juan Antonio; Maireles Torres, Pedro; Gas-phase hydrogenation of furfural to furfuryl alcohol over Cu-ZnO-Al2O3 catalysts prepared from layered double hydroxides; Molecular Diversity Preservation International; Catalysts; 10; 5; 29-4-2020; 1-22
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