Thermodynamic Analysis and Experimental Study of Selective Dehydrogenation of 1,2-cyclohexanediol over Cu2+1O/MgO Catalysts
1
School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
2
Hebei Province Technology Institute of Green Chemical Industry, Hebei University of Technology, Tianjin 300130, China
*
Authors to whom correspondence should be addressed.
Sustainability 2019, 11(3), 902; https://doi.org/10.3390/su11030902
Received: 21 January 2019 / Revised: 8 February 2019 / Accepted: 9 February 2019 / Published: 10 February 2019
(This article belongs to the Special Issue Environment-Friendly Chemical Processes)
The dehydrogenation of 1,2-cyclohexanediol (CHD) helps in the effective utilization of not only fossil derivatives but also vicinal diols and polyols from sustainable biomass-derived resources. A thermodynamic analysis of CHD dehydrogenation was computed with density functional theory (DFT) calculation using Gaussian 09. The result indicates that CHD can be converted to 2-hydroxy cyclohexanone (HCO), 2-hydroxy-2-cyclohexen-1-one (HCEO) and pyrocatechol depending on the degree of dehydrogenation. HCO and HCEO are the stable products of the primary and secondary dehydrogenation. Experimentally, Cu/MgO catalysts were prepared using glucose as a reductant, and were characterized by SEM, TEM, XRD, XPS, TPR, BET and ICP. Furthermore, their catalytic performance regarding the oxygen-free dehydrogenation of CHD was investigated. The results indicate that the primary active crystalline phase of Cu/MgO was Cu2+1O, and that the dehydrogenation products were mainly HCO and HCEO, in accordance with thermodynamic predictions. Upon optimizing the reaction conditions, the total selectivity of HCO and HCEO exceeded 90% and the conversion of CHD was approximately 95%.
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Keywords:
1,2-cyclohexanediol; Cu2+1O/MgO; dehydrogenation; 2-hydroxy cyclohexanone; 2-hydroxy-2-cyclohexen-1-one
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MDPI and ACS Style
Wang, H.; Yang, Q.; Song, Y.; Wang, Y. Thermodynamic Analysis and Experimental Study of Selective Dehydrogenation of 1,2-cyclohexanediol over Cu2+1O/MgO Catalysts. Sustainability 2019, 11, 902. https://doi.org/10.3390/su11030902
AMA Style
Wang H, Yang Q, Song Y, Wang Y. Thermodynamic Analysis and Experimental Study of Selective Dehydrogenation of 1,2-cyclohexanediol over Cu2+1O/MgO Catalysts. Sustainability. 2019; 11(3):902. https://doi.org/10.3390/su11030902
Chicago/Turabian StyleWang, Haiou, Qiusheng Yang, Yucong Song, and Yanji Wang. 2019. "Thermodynamic Analysis and Experimental Study of Selective Dehydrogenation of 1,2-cyclohexanediol over Cu2+1O/MgO Catalysts" Sustainability 11, no. 3: 902. https://doi.org/10.3390/su11030902
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