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Molecules 2014, 19(12), 20594-20612; doi:10.3390/molecules191220594

Vapour Phase Hydrogenation of Phenol over Rhodium on SBA-15 and SBA-16

1
Departamento de Química, Universidad Nacional de Colombia, Bogotá 110911, Colombia
2
Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de la Guajira, Riohacha 440001, Colombia
3
Grupo de Investigación en Sólidos Porosos y Calorimetría, Departamento de Química, Universidad de los Andes, Bogotá 110911, Colombia
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Received: 22 September 2014 / Revised: 17 November 2014 / Accepted: 24 November 2014 / Published: 10 December 2014
(This article belongs to the Special Issue Zeolite Chemistry)
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Abstract

In the present work, mesoporous SBA-15 and SBA-16 were synthesised using classical methods, and their physicochemical properties were investigated by X-ray diffraction (XRD), FTIR, TEM and N2 adsorption–desorption. Rhodium (Rh, 1 wt %) was loaded on the mesoporous SBA-15 and SBA-16 by an impregnation method. The Rh surface coverage, dispersion and crystallite size were determined by room temperature H2 chemisorption on reduced samples. The catalytic activity of Rh supported on mesoporous SBA-15 and SBA-16 was evaluated for the first time in the hydrogenation of phenol in vapour phase in a temperature range between 130 and 270 °C at atmospheric pressure. The reaction over Rh/SBA-15 at 180 °C produced cyclohexanone as the major product (about 60%) along with lower amounts of cyclohexanol (about 35%) and cyclohexane (about 15%). The influences of temperature, H2/phenol ratio, contact time and the nature of the solvent on the catalytic performance were systematically investigated. The Rh/SBA-16 system offered lower phenol conversion compared to Rh/SBA-15, but both have a very high selectivity for cyclohexanone (above 60%). View Full-Text
Keywords: phenol hydrogenation; mesoporous materials; rhodium/SBA; zeolites phenol hydrogenation; mesoporous materials; rhodium/SBA; zeolites
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Giraldo, L.; Bastidas-Barranco, M.; Moreno-Piraján, J.C. Vapour Phase Hydrogenation of Phenol over Rhodium on SBA-15 and SBA-16. Molecules 2014, 19, 20594-20612.

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