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Hydrogenation Performance of Acetophenone to 1-Phenylethanol on Highly Active Nano Cu/SiO2 Catalyst

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Abstract

In this work, highly active nano Cu/SiO2 catalysts with various copper content were prepared by urea homogeneous precipitation method. The catalysts were characterized by N2 adsorption, XRD, H2-TPR, XPS and TEM. It was found that the nano Cu/SiO2 catalyst displayed excellent catalytic performance for the selective hydrogenation of acetophenone (AP) to 1-phenylethanol (PhE) when copper content was 25 wt%. The Cu/SiO2 catalyst had well dispersed copper species, small particle size, high BET surface area (ca. 540 m2/g) and abundant pore structure. The influence of different reaction conditions on the hydrogenation process were also discussed. AP conversion and the PhE selectivity reached 99.8% and 99.08%, respectively, under the optimal reaction conditions (Temperature: 353 K; Pressure: 2.0 MPa, LHSV: 1.0 h−1 and the molar ratio of H2/AP:15). Besides, the above catalyst maintained a high catalytic performance in the duration of 500 h operation. The synergistic effect between Cu+ and Cu0 improved the activity and stability of Cu/SiO2 catalyst. The research indicated that the catalyst had a wide industrial prospect.

Graphic Abstract

The Cu/SiO2 catalyst showed a good performance for AP hydrogenation. The reduced Cu/SiO2 catalyst contains both Cu+ and Cu0 consistent with XPS. Cu+ sties stabilize the methoxy and acyl species and Cu0 facilitates the decomposition of H2. Phenyl in AP and Cu had electrostatic repulsion, which was favorable for desorption of PhE.

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Acknowledgements

This work was supported by grant from the Natural Science Foundation of Shandong Province (ZR2017ZC0632),  the Natural Science Foundation of National (NSFC21376128), the doctor foundation of Shandong province (No. ZR2019BB010) and Qingdao Applied Basic Research Program, Shandong Key Laboratory of Reactions and Isolations of Multi-phase Liquid (2019MFRSE-B03).

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Authors and Affiliations

  1. State Key Laboratory Base for Eco-chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, No. 53 Zhengzhou Road, Qingdao, 266042, China

    Bing Wang, Manman Jin, Hao An & Zhiguo Lv

  2. College of Marine Science and Biological Engineering, Qingdao University of Science and Technology, No. 53 Zhengzhou Road, Qingdao, 266042, China

    Zhenmei Guo

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  1. Bing Wang
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  2. Manman Jin
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  3. Hao An
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Correspondence to Zhiguo Lv.

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Wang, B., Jin, M., An, H. et al. Hydrogenation Performance of Acetophenone to 1-Phenylethanol on Highly Active Nano Cu/SiO2 Catalyst. Catal Lett 150, 56–64 (2020). https://doi.org/10.1007/s10562-019-02908-2

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