RT Journal Article
T1 Ruthenium incorporation into hydrotalcites-derived mixed oxides for phenol hydrogenation: Role of Mg/Al molar ratio
A1 Barroso-Martín, Isabel
A1 Benmebirouk-Pareja, Nadia
A1 Montaña, Maia
A1 Cecilia-Buenestado, Juan Antonio
A1 Infantes-Molina, Antonia
A1 Rodríguez-Castellón, Enrique
K1 Óxidos
K1 Catalizadores
K1 Rutenio
K1 Hidrogenación
K1 Fenol
K1 Elementos químicos
AB In this work the catalytic behaviour of Ru supported on mixed oxides derived from non-commercial hydrotalcites in phenol hydrogenation was studied in a batch reactor working at 30 bar and 200 °C. To this end, a set of catalysts with 2 wt% Ru and a Mg/Al molar ratio of 1, 2, 3 and 4 was synthesized. The catalysts were tested in phenol hydrogenation to assess the influence of Mg/Al ratio on the catalytic performance in terms of conversion and selectivities to cyclohexanol and cyclohexanone. Physicochemical characterization was performed by X-ray Diffraction (XRD), N2 adsorption-desorption isotherms, dispersive X-ray spectroscopy in scanning transmission electron microscopy (EDS-STEM), CO chemisorption at 35 °C, CO2 and NH3 thermoprogrammed desorption (TPD) and X-ray Photoelectron Spectroscopy (XPS). The Mg/Al molar ratio employed determined the catalytic response of the resulting catalysts, obtaining the best catalytic performance (95.9 % conversion and 47.4 % cyclohexanone selectivity) with the sample with the lowest Mg/Al ratio, RuMA1. XRD results showed that in RuMA1 catalyst the hydrotalcite structure was completely transformed into the corresponding mixed oxide after thermal treatment and was also the only one in which MgAl2O4 spinel was not formed. In addition, RuMA1 presented the highest specific surface area, the greatest Ru dispersion, as evidenced by CO-chemisorption and EDX-STEM analysis, as well as a good balance between basic and acid sites and a greater proportion of Bronsted acid sites that also explain it greater selectivity to cyclohexanol.
PB Elsevier
YR 2023
FD 2023-06
LK https://hdl.handle.net/10630/27152
UL https://hdl.handle.net/10630/27152
LA eng
NO Barroso-Martín, I., Benmebirouk-Pareja, N., Montaña, M., Cecilia, J. A., Infantes-Molina, A., & Rodríguez-Castellón, E. (2023). Ruthenium incorporation into hydrotalcites-derived mixed oxides for phenol hydrogenation: role of Mg/Al molar ratio. Catalysis Today, 114274.
NO This publication is part of the R&D project PID2021-126235OB-C32 funded by MCIN/ AEI/10.13039/501100011033/ and FEDER funds. Funding for open access charge: Universidad de Málaga / CBUA.  IBM thanks University of Malaga for a postdoctoral grant.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026