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The bifunctional active sites on carbon supported Fe-Mo bimetallic catalyst to improve Kraft lignin liquefaction

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  • Li, Chang
  • Wang, Yishuang
  • Tang, Zhiyuan
  • Zhou, Zinan
  • Qin, Baolong
  • Chen, Mingqiang

Abstract

Carbon-supported Fe-Mo bimetallic catalysts were synthesized for the thermal catalytic ethanolysis of lignin to liquid fuels composed of aromatic monomers. A yield of 40.7 wt % of lignin oil, consisting of 38.8 wt % phenol monomers and 39.3 wt % benzeneacetaldehyde monomers, was obtained in the presence of Fe-Mo-P catalysts (1:0.5) at 290 °C for 4 h in the supercritical ethanol solvent (6.5 MPa). The catalysts exhibited a rich distribution of α-MoC nanoparticles, Fe0 nanoclusters, surface oxygen defects, and active species of Mo6+ and phosphoric acid on the graphitized microporous carbon substrate. The synergistic effects of these active components were crucial for enhancing lignin liquefaction efficiency. The ethanolysis of the lignin model compound revealed that the Fe-Mo bimetallic catalyst can facilitate double cracking of C-C/C-O bonds under supercritical ethanol conditions. In situ Raman and FT-IR characterization were performed to monitor the transformation of the Fe-Mo bimetallic catalyst from the precursor to the carbon material, including the dehydration and carbonization of the organic precursor.

Suggested Citation

  • Li, Chang & Wang, Yishuang & Tang, Zhiyuan & Zhou, Zinan & Qin, Baolong & Chen, Mingqiang, 2023. "The bifunctional active sites on carbon supported Fe-Mo bimetallic catalyst to improve Kraft lignin liquefaction," Renewable Energy, Elsevier, vol. 219(P2).
    • Handle: RePEc:eee:renene:v:219:y:2023:i:p2:s0960148123014180
    DOI: 10.1016/j.renene.2023.119503
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    References listed on IDEAS

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    1. Qinglei Meng & Jiang Yan & Ruizhi Wu & Huizhen Liu & Yang Sun & NingNing Wu & Junfeng Xiang & Lirong Zheng & Jing Zhang & Buxing Han, 2021. "Sustainable production of benzene from lignin," Nature Communications, Nature, vol. 12(1), pages 1-12, December.
    2. Md. Matiar Rahman & Mahbubul Muttakin & Animesh Pal & Abu Zar Shafiullah & Bidyut Baran Saha, 2019. "A Statistical Approach to Determine Optimal Models for IUPAC-Classified Adsorption Isotherms," Energies, MDPI, vol. 12(23), pages 1-34, November.
    3. Wei Liu & Wenqin You & Wei Sun & Weisheng Yang & Akshay Korde & Yutao Gong & Yulin Deng, 2020. "Ambient-pressure and low-temperature upgrading of lignin bio-oil to hydrocarbons using a hydrogen buffer catalytic system," Nature Energy, Nature, vol. 5(10), pages 759-767, October.
    4. Chen, Mingqiang & Li, Hong & Wang, Yishuang & Tang, Zhiyuan & Dai, Wei & Li, Chang & Yang, Zhonglian & Wang, Jun, 2023. "Lignin depolymerization for aromatic compounds over Ni-Ce/biochar catalyst under aqueous-phase glycerol," Applied Energy, Elsevier, vol. 332(C).
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