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Open AccessArticle

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

Departamento de Química, Universidad Nacional de Colombia, Bogotá 110911, Colombia
Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de la Guajira, Riohacha 440001, Colombia
Grupo de Investigación en Sólidos Porosos y Calorimetría, Departamento de Química, Universidad de los Andes, Bogotá 110911, Colombia
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Molecules 2014, 19(12), 20594-20612;
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)
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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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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