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Effect of Mesopore Structural Parameters in Alumina Supports on Catalytic Hydrodeoxygenation of Guaiacol to Cycloalkanes via Ni-Supported Al 2 O 3 Catalysts

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  • Wen Huang

    (School of Energy and Environment, Southeast University, Nanjing 211100, China)

  • Chengyan Wen

    (School of Energy and Environment, Southeast University, Nanjing 211100, China
    Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China)

  • Yanting Su

    (School of Energy and Environment, Southeast University, Nanjing 211100, China)

  • Xinghua Zhang

    (School of Energy and Environment, Southeast University, Nanjing 211100, China)

  • Longlong Ma

    (School of Energy and Environment, Southeast University, Nanjing 211100, China)

Abstract

The elevated oxygen content in lignin-derived oil restricts its direct application as a liquid fuel. Ni-based Al 2 O 3 catalysts are commonly employed to enhance the quality of lignin-derived oil via the hydrodeoxygenation (HDO) process. In this study, we successfully synthesized Ni-supported Al 2 O 3 catalysts with diverse mesopore structural parameters of the Al 2 O 3 support. Subsequently, we investigated the impacts of mesoporous size and volume on the HDO of guaiacol, a representative model compound of lignin-derived oil. The results indicate that optimizing the mesoporous size can enhance catalyst stability and significantly boost selectivity for cyclohexane. Moreover, an increase in the mesoporous volume can further improve the selectivity of cycloalkanes in the products. When the Ni/meso-Al 2 O 3 -F-100 catalyst was utilized, the cycloalkane selectivity reached 98.8%. During the upgrading of lignin-derived oil, the Ni/meso-Al 2 O 3 -F-200 catalyst, featuring a mesopore size of 4.07 nm and a mesopore volume of 0.286 cm 3 /g, exhibited outstanding performance. Notably, its selectivity for alkanes reached 65.9%, significantly higher than that of the commercial Ni/c-Al 2 O 3 catalyst, which has a mesopore size of 3.83 nm and a mesopore volume of 0.184 cm 3 /g. This work offers valuable insights into the design of efficient and stable Ni-based Al 2 O 3 catalysts for upgrading lignin-derived oil.

Suggested Citation

  • Wen Huang & Chengyan Wen & Yanting Su & Xinghua Zhang & Longlong Ma, 2025. "Effect of Mesopore Structural Parameters in Alumina Supports on Catalytic Hydrodeoxygenation of Guaiacol to Cycloalkanes via Ni-Supported Al 2 O 3 Catalysts," Energies, MDPI, vol. 18(12), pages 1-15, June.
    • Handle: RePEc:gam:jeners:v:18:y:2025:i:12:p:3044-:d:1674851
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    References listed on IDEAS

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    1. Liang, Jie & Shan, Guangcun & Sun, Yifei, 2021. "Catalytic fast pyrolysis of lignocellulosic biomass: Critical role of zeolite catalysts," Renewable and Sustainable Energy Reviews, Elsevier, vol. 139(C).
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