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Catalytic pyrolysis of lignin to aromatic hydrocarbons over Nb/Al oxide catalyst

Author

Listed:
  • Yang, Deshi
  • Huang, Jianpeng
  • Hu, Zhipeng
  • Qin, Shiqi
  • Mu, Jiaxin
  • Wang, Fengqiang
  • Zhang, Zhijun
  • Xie, Yanjun
  • Liu, Shouxin
  • Wang, Qingwen

Abstract

Catalytic fast pyrolysis (CFP) of lignin aiming monocyclic aromatic hydrocarbons (MAHs) is attractive. Five metal oxide catalysts (named c-Nb3Alx) with different Nb/Al ratios, c-Nb, c-Al, c-Nb3Al1, c-Nb3Al2 and c-Nb3Al3 were synthesized and applied to CFP of lignin. Among these catalysts, c-Nb3Al2 exhibits excellent deoxygenation ability and the highest selectivity for MAHs (77.0 %). The selectivity and deoxygenation capacity of c-Nb3Al2 for MAHs were higher than H-ZSM-5 (25) as a control. It was attributed to the large external surface area (90 m2g-1), mesoporous structure (16.15 nm) and high acid amount (2.00 mmolNH3/gcat) of c-Nb3Al2. The c-Nb3Al2 has good stability and can be regenerated by simple calcination. The selectivity of the regenerated c-Nb3Al2 for MAHs was still high at 70.1 %. Guaiacol was used to compare the difference in the deoxygenation capacity of c-Nb3Al2 and H-ZSM-5.

Suggested Citation

  • Yang, Deshi & Huang, Jianpeng & Hu, Zhipeng & Qin, Shiqi & Mu, Jiaxin & Wang, Fengqiang & Zhang, Zhijun & Xie, Yanjun & Liu, Shouxin & Wang, Qingwen, 2024. "Catalytic pyrolysis of lignin to aromatic hydrocarbons over Nb/Al oxide catalyst," Energy, Elsevier, vol. 302(C).
    • Handle: RePEc:eee:energy:v:302:y:2024:i:c:s0360544224015378
    DOI: 10.1016/j.energy.2024.131764
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    References listed on IDEAS

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    1. Ryu, Hae Won & Lee, Hyung Won & Jae, Jungho & Park, Young-Kwon, 2019. "Catalytic pyrolysis of lignin for the production of aromatic hydrocarbons: Effect of magnesium oxide catalyst," Energy, Elsevier, vol. 179(C), pages 669-675.
    2. Rong, Siteng & Tan, Hongzi & Pang, Zhaobin & Zong, Zhiyuan & Zhao, Rongrong & Li, Zhihe & Chen, Zhe-Ning & Zhang, Ning-Ning & Yi, Weiming & Cui, Hongyou, 2022. "Synergetic effect between Pd clusters and oxygen vacancies in hierarchical Nb2O5 for lignin-derived phenol hydrodeoxygenation into benzene," Renewable Energy, Elsevier, vol. 187(C), pages 271-281.
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