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Hierarchical Porous Activated Carbon-Supported Ruthenium Catalysts for Catalytic Cleavage of Lignin Model Compounds

Author

Listed:
  • Xuan-Tien Pham

    (Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
    Vietnam National University, Ho Chi Minh City, Vietnam)

  • Vy Anh Tran

    (Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam
    Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, Ho Chi Minh City, Vietnam)

  • Lan-Trinh Thi Tran

    (Vietnam National University, Ho Chi Minh City, Vietnam
    Faculty of Chemical Engineering, Ho Chi Minh City University of Technology (VNU-HCM), 268 Ly Thuong Kiet, Ho Chi Minh City, Vietnam)

  • Tram Ngoc P. Nguyen

    (Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
    Vietnam National University, Ho Chi Minh City, Vietnam)

  • Thong Hoang Le

    (Vietnam National University, Ho Chi Minh City, Vietnam
    School of Biotechnology, International University, Ho Chi Minh City, Vietnam)

  • Huy Hoang

    (Vietnam National University, Ho Chi Minh City, Vietnam
    School of Biotechnology, International University, Ho Chi Minh City, Vietnam)

  • Thi-Hiep Nguyen

    (Vietnam National University, Ho Chi Minh City, Vietnam
    School of Biomedical Engineering, International University, Ho Chi Minh City, Vietnam)

  • Khanh B. Vu

    (Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
    Vietnam National University, Ho Chi Minh City, Vietnam)

  • Thanh Khoa Phung

    (Department of Chemical Engineering, School of Chemical and Environmental Engineering, International University, Ho Chi Minh City, Vietnam
    Vietnam National University, Ho Chi Minh City, Vietnam)

Abstract

The catalytic conversion of lignin model compounds was performed using Ru/C catalysts and an autoclave reactor. The Ru/C catalysts were prepared by the impregnation method using highly porous homemade activated carbon and characterized by XRD, SEM, and specific surface area. The catalytic reactions were performed in a high pressure/temperature reactor at different temperatures and with different solvents. The results showed that the novel Ru/C catalysts prepared from carbon supports activated by the KOH agent showed higher catalytic activity than the commercial catalyst. Ethanol and 2-propanol were suitable solvents for the cleavage of the β–O–4 ether bond of 2-phenoxy-1-phenyl ethanol (~65–70% conversion) over a Ru/C-KOH-2 catalyst at 220 °C in comparison to tert-butanol and 1-propanol solvents (~43–47% conversion of 2-phenoxy-1-phenyl ethanol). Also, the increase in reaction temperature from 200 °C to 240 °C enhanced the cleavage of the ether bond with an increase in phenol selectivity from 9.4% to 19.5% and improved the catalytic conversion of 2-phenoxy-1-phenyl ethanol from 46.6% to 98.5% over the Ru/C-KOH-2 catalyst and ethanol solvent. The Ru/C-KOH-2 catalyst showed outstanding conversion (98.5%) of 2-phenoxy-1-phenylethanol at 240 °C, 1 h, ethanol solvent. This novel hierarchical porous activated carbon-supported ruthenium catalyst (Ru/C-KOH-2) can be applied for the further conversion of the lignin compound.

Suggested Citation

  • Xuan-Tien Pham & Vy Anh Tran & Lan-Trinh Thi Tran & Tram Ngoc P. Nguyen & Thong Hoang Le & Huy Hoang & Thi-Hiep Nguyen & Khanh B. Vu & Thanh Khoa Phung, 2022. "Hierarchical Porous Activated Carbon-Supported Ruthenium Catalysts for Catalytic Cleavage of Lignin Model Compounds," Energies, MDPI, vol. 15(22), pages 1-10, November.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:22:p:8611-:d:975319
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    References listed on IDEAS

    as
    1. Lin, Feng & Ma, Yulong & Sun, Yonggang & Zhao, Kanghe & Gao, Tingting & Zhu, Yingbo, 2021. "Heterogeneous Ni–Ru/H-ZSM-5 one-pot catalytic conversion of lignin into monophenols," Renewable Energy, Elsevier, vol. 170(C), pages 1070-1080.
    2. Zhang, Chengzhi & Zhang, Xing & Wu, Jingfeng & Zhu, Lingjun & Wang, Shurong, 2022. "Hydrodeoxygenation of lignin-derived phenolics to cycloalkanes over Ni–Co alloy coupled with oxophilic NbOx," Applied Energy, Elsevier, vol. 328(C).
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