Publication: Dehydrogenation of cyclohexanol to cyclohexanone over nitrogen-doped graphene supported cu catalyst
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Date
2020
Authors
Mageed A.K.
Radiah D.A.B.
Salmiaton A.
Izhar S.
Razak M.A.
Ayodele B.V.
Journal Title
Journal ISSN
Volume Title
Publisher
Diponegoro University
Abstract
In this study, the dehydrogenation of cyclohexanol to cyclohexanone over nitrogen-doped reduced gra-phene 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 us-ing 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 excel-lent 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 high-est cyclohexanol conversion and selectivity of 93.3% and 82.7%, respectively, were obtained at a reac-tion temperature of 270 �C and cyclohexanol feed rate of 0.1 ml/min. Copyright � 2020 BCREC Group. All rights reserved.
Description
Catalyst activity; Chemical reactors; Copper; Copper metallography; Dehydrogenation; Doping (additives); Graphene oxide; Reduced Graphene Oxide; Temperature; Chemical reduction; Cu nano-particles; Effects of temperature; Heterogeneous catalyst; Nitrogen doped graphene; Reactant flow-rates; Support interaction; Wet impregnation method; Catalyst supports