Evaluation of the activity of a gold catalyst supported on alumina (Au/γ_Al2O3)

5th Colombian Conference of Engineering Physics

物理学;工业技术

Barrera, M.^1 ; Gómez, R.^1 ; Caballero, C.^1 ; Oviedo, J.^2 ; Sánchez, L.C.^3

Departamento de Química, Universidad de Córdoba, Carrera 6 # 76 - 103 Montería, Córdoba, Colombia^1

Departamento de Física y Electrónica, Universidad de Córdoba, Carrera 6 # 76 - 103 Montería, Córdoba, Colombia^2

Grupo Avanzado de Materiales y Sistemas Complejos (GAMASCO), Universidad de Córdoba, Colombia^3

关键词: 2 Cyclohexen 1 ones;    Cyclohexenes;    Epoxycyclohexane;    Gas chromatographs;    Gold catalysts;    High conversions;    Oxidation reactions;    Precipitation-deposition method;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/850/1/012008/pdf
DOI  :  10.1088/1742-6596/850/1/012008

学科分类：工业工程学

来源: IOP

【 摘 要 】

The activity and selectivity of a catalyst (Au/γ-Al2O3) and the support (γ-Al2O3cubic) in the oxidation reaction of cyclohexene in the liquid phase to obtain (epoxycyclohexane, 2-cyclohexen-1-ona, 2-cyclohexen-1-ol) were evaluated. The catalyst was prepared by the precipitation-deposition method from aqueous solutions of HAuCl4, citric acid (2% m/v) and polyvinyl alcohol. For the adequacy of the support, starting from boehmite calcined at 773 K, γ-Al2O3phase was obtained. The reaction products and the evaluation of the same were analyzed by gas chromatograph (GC), showing relevant results of the Au/γ-Al2O3system with high conversion levels, mostly to products of 2-cyclohexen-1-one, 2-cyclohexen-1-ol with 31.17% and 25.89% selectivity respectively, and to a lesser proportion to epoxycyclohexane with 13.33% selectivity. Regarding to the system formed by the support, the results reported were 13.31% for 2-cyclohexen-1-ona, 4.28% for 2-cyclohexen-1-ol and 3-23% epoxycyclohexane.