Dehydrogenation of Cyclohexanol to Cyclohexanone Over Nitrogen-doped Graphene supported Cu catalyst

• Published in: Bulletin of chemical reaction engineering & catalysis Vol. 15; no. 2; pp. 568 - 578
• Main Authors: Mageed, Alyaa. K., Radiah, Dayang A. B., Salmiaton, A., Izhar, Shamsul, Razak, Musab Abdul, Ayodele, Bamidele Victor
• Format: Journal Article
• Language: English
• Published: Semarang Department of Chemical Engineering, Diponegoro University 01.08.2020; Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)
• Subjects: Catalysts; Catalytic activity; Catalytic converters; Chemical reduction; Chemical synthesis; copper; cyclohexanol; Cyclohexanone; Dehydrogenation; Feed rate; Fixed bed reactors; Fixed beds; Flow velocity; Graphene; Nanoparticles; Nitrogen; nitrogen-doped reduced graphene oxide; Raman spectroscopy; Selectivity; Stainless steels; Temperature effects
• ISSN: 1978-2993; 1978-2993
• DOI: 10.9767/bcrec.15.2.6774.568-578

In this study, the dehydrogenation of cyclohexanol to cyclohexanone over nitrogen-doped reduced graphene oxide (N-rGO) Cu catalyst has been reported. The N-rGO support was synthesized by chemical reduction of graphite oxide (GO). The synthesized N-rGO was used as a support to prepare the Cu/N-rGO catalyst via an incipient wet impregnation method. The as-prepared support and the Cu/N-rGO catalyst were characterized by FESEM, EDX, XRD, TEM, TGA, and Raman spectroscopy. The various characterization analysis revealed the suitability of the Cu/N-rGO as a heterogeneous catalyst that can be employed for the dehydrogenation of cyclohexanol to cyclohexanone. The catalytic activity of the Cu/N-rGO catalyst was tested in non-oxidative dehydrogenation of cyclohexanol to cyclohexanone using a stainless-steel fixed bed reactor. The effects of temperature, reactant flow rate, and time-on-stream on the activity of the Cu/N-rGO catalyst were examined. The Cu/N-rGO nanosheets show excellent catalytic activity and selectivity to cyclohexanone. The formation of stable Cu nanoparticles on N-rGO support interaction and segregation of Cu were crucial factors for the catalytic activity. The highest cyclohexanol conversion and selectivity of 93.3% and 82.7%, respectively, were obtained at a reaction temperature of 270 °C and cyclohexanol feed rate of 0.1 ml/min. Copyright © 2020 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).