Volume 7 Issue 5
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Article Navigation >  Green Energy&Environment  > 2022  >  7(5): 1014-1023
Yingying Xin, Zhaoxia Zheng, Zhicheng Luo, Chengzhen Jiang, Shaofeng Gao, Zhihao Wang, Chen Zhao. The influence of pore structures and Lewis acid sites on selective hydrogenolysis of guaiacol to benzene over Ru/TS-1. Green Energy&Environment, 2022, 7(5): 1014-1023. doi: 10.1016/j.gee.2020.12.024
Citation: Yingying Xin, Zhaoxia Zheng, Zhicheng Luo, Chengzhen Jiang, Shaofeng Gao, Zhihao Wang, Chen Zhao. The influence of pore structures and Lewis acid sites on selective hydrogenolysis of guaiacol to benzene over Ru/TS-1. Green Energy&Environment, 2022, 7(5): 1014-1023. doi: 10.1016/j.gee.2020.12.024
shu

The influence of pore structures and Lewis acid sites on selective hydrogenolysis of guaiacol to benzene over Ru/TS-1

doi: 10.1016/j.gee.2020.12.024

  • a Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Shanghai, 200062, China;

  • b Jinan Shengquan Group Share Holding Co., Ltd., Jinan, 250204, China

Funds:

This research was supported by the National Key Research and Development Program of China (Grant No. 2016YFB0701100), the Recruitment Program of Global Young Experts in China, Natural Science Foundation of China (Grant No. 21573075).

  • Received date 29 August 2020, Accepted date 30 December 2020, RevRecd date 15 December 2020, Publish date 05 January 2021,
    Abstract
  • Here, we report a Ru/TS-1 catalyst for selective hydrogenolysis of guaiacol to benzene in the aqueous phase at conditions of 240 ℃ and 0.2 MPa H2, achieving a benzene yield of 86% with a hydrogenolysis rate of 103.1 mmol g-1 h-1. It was found that Silicalite-1 (MFI type) with suitable pore sizes supported Ru nanoparticles (NPs) favored for hydrogenolysis of guaiacol, whereas de-aluminated Ru/HBEA, Ru/HY and Ru/MWW (without acidic sites) accelerated the parallel reactions of hydrogenation of aromatics. In addition, Ru NPs located at the orifice of Silicalite-1 was proved to be more electron-deficient and active than Ru NPs on the outer surface, as evidenced by CO-IR characterization and activity tests on Ru/Silicalite-1 (with and without templates). Moreover, Brønsted acid sites (BAS) on Ru/MFI highly promoted the hydrogenation rates of aromatics, while Lewis acid sites (LAS) on Ru/TS-1 and Ru/MFI led to a linear increase of guaiacol hydrogenolysis rate to benzene, probably due to the enhanced absorbance capability of guaiacol and phenol on the LAS of MFI. Thus, pore structure properties of MFI coupled with abundant LAS (TS-1) as well as Ru NPs on the orifice of pores of TS-1 construct a promising catalyst for achieving efficient aromatic hydrocarbons from selective hydrogenolysis of lignin.

     

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