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Issue 23, 2019
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An efficient Cu-based catalyst for the hydrogenation of ethylene carbonate to ethylene glycol and methanol

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Abstract

Indirect CO2 conversion to ethylene glycol (EG) and methanol (ME) via CO2-derived ethylene carbonate (EC) as the intermediate is an attractive and promising approach. Cu-Based catalysts have been regarded as effective catalysts for the hydrogenation of EC to yield ME and EG. In this work, we prepared Cu/SiO2 catalysts through different methods for the hydrogenation of EC to yield ME and EG. The results show that Cu/SiO2-AE catalysts prepared by an ammonia evaporation (AE) method are superior to Cu/SiO2-DP catalysts prepared by a deposition–precipitation (DP) method. After modification using glucose with an optimal amount, the Cu8G1/SiO2-AE catalysts showed enhanced catalytic performance, furnishing 86% selectivity to ME and 99% selectivity to EG at almost full conversion of EC, with a TOF value for ME formation reaching about 39 h−1. A series of techniques such as N2 sorption, ICP-AES, FT-IR, H2-TPR, H2-TPD, TEM, and XPS were adopted to characterize the physicochemical properties of relevant catalysts. It was found that the Cu/SiO2-AE catalyst had a smaller Cu particle size. After modification with glucose, the Cu8G1/SiO2-AE catalyst had the smallest Cu particle size, the highest hydrogen adsorption ability, and the strongest interaction of Cu with SiO2 so that the highest Cu+/(Cu0 + Cu+) molar ratio was detected. In addition, upon investigation of catalyst stability and reusability, it was found that glucose modification for the Cu/SiO2-AE catalyst can also alleviate the deactivation distinctly.

Graphical abstract: An efficient Cu-based catalyst for the hydrogenation of ethylene carbonate to ethylene glycol and methanol

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Publication details

The article was received on 08 Aug 2019, accepted on 20 Oct 2019 and first published on 21 Oct 2019


Article type: Paper
DOI: 10.1039/C9CY01586H
Catal. Sci. Technol., 2019,9, 6749-6759

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    An efficient Cu-based catalyst for the hydrogenation of ethylene carbonate to ethylene glycol and methanol

    W. Chen, T. Song, J. Tian, P. Wu and X. Li, Catal. Sci. Technol., 2019, 9, 6749
    DOI: 10.1039/C9CY01586H

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