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Benzene, toluene and xylene (BTX) from in-situ gas phase hydrodeoxygenation of guaiacol with liquid hydrogen donor over bifunctional non-noble-metal zeolite catalysts

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  • Fan, Xu-dong
  • Wu, Yu-jian
  • Li, Zhi-yu
  • Sun, Yan
  • Tu, Ren
  • Zhong, Pei-Dong
  • Jiang, En-chen
  • Xu, Xi-wei

Abstract

Hydrogen donors were employed to replace pure hydrogen as a hydrogen source for in-situ gas phase HDO due to their low storage and transportation cost. A series of catalysts have been prepared by modifying the zeolite HZSM-5 with polymetallic and multi-carriers. Gas-phase hydrodeoxygenation (HDO) of guaiacol was conducted under a pressure 2 MPa and a temperature at 350 °C. The effect of polymetallic and multi-carrier modification on HDO activity was investigated. The physicochemical properties of catalysts were characterized by BET, XRD, SEM, H2-TPR, XPS and NH3-TPD. The characterization results showed that when La was loaded, the catalyst Ni/HZSM-5&La obtained a stronger medium-strong acidity. The electronic transfer of the elemental nickel was promoted. After HDO, the catalyst Ni/HZSM-5&La exhibited the highest HDO rate and BTX selectivity, reaching 97.79% and 34.25%, respectively. The real bio-oil HDO under a hydrogen donor were also analyzed. The results showed the content of the hydrocarbon compound were over 95%. The reaction mechanism was discussed through the distribution of liquid product species. Direct demethoxylation pathway (DMO) and methylation pathway (ME) were considered as the main pathways.

Suggested Citation

  • Fan, Xu-dong & Wu, Yu-jian & Li, Zhi-yu & Sun, Yan & Tu, Ren & Zhong, Pei-Dong & Jiang, En-chen & Xu, Xi-wei, 2020. "Benzene, toluene and xylene (BTX) from in-situ gas phase hydrodeoxygenation of guaiacol with liquid hydrogen donor over bifunctional non-noble-metal zeolite catalysts," Renewable Energy, Elsevier, vol. 152(C), pages 1391-1402.
    • Handle: RePEc:eee:renene:v:152:y:2020:i:c:p:1391-1402
    DOI: 10.1016/j.renene.2020.01.015
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    References listed on IDEAS

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    1. Xu, Xiwei & Jiang, Enchen & Du, Yanhong & Li, Bosong, 2016. "BTX from the gas-phase hydrodeoxygenation and transmethylation of guaiacol at room pressure," Renewable Energy, Elsevier, vol. 96(PA), pages 458-468.
    2. Oh, Shinyoung & Kim, Ung-Jin & Choi, In-Gyu & Choi, Joon Weon, 2016. "Solvent effects on improvement of fuel properties during hydrodeoxygenation process of bio-oil in the presence of Pt/C," Energy, Elsevier, vol. 113(C), pages 116-123.
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    1. Gao, Xueying & Li, Helong & Wang, Shuizhong & Liu, Zhenzhen & Ma, Jian-feng & Liu, Xing-e & Song, Guoyong, 2022. "Hydrodeoxygenation of lignin biophenolics to cyclohexanes over sub-nanometric Ru multifunctional catalyst," Renewable Energy, Elsevier, vol. 201(P1), pages 724-733.
    2. Jiang, Jingyun & Ding, Wentao & Li, Hao, 2021. "Promotional effect of F for Pd/HZSM-5 catalyst on selective HDO of biobased ketones," Renewable Energy, Elsevier, vol. 179(C), pages 1262-1270.
    3. Tai, Lingyu & Hamidi, Roya & de Caprariis, Benedetta & Damizia, Martina & Paglia, Laura & Scarsella, Marco & Karimzadeh, Ramin & De Filippis, Paolo, 2022. "Guaiacol hydrotreating with in-situ generated hydrogen over ni/modified zeolite supports," Renewable Energy, Elsevier, vol. 182(C), pages 647-658.
    4. Fan, Xu-dong & Wu, Yu-jian & Tu, Ren & Sun, Yan & Jiang, En-chen & Xu, Xi-wei, 2020. "Hydrodeoxygenation of guaiacol via rice husk char supported Ni based catalysts: The influence of char supports," Renewable Energy, Elsevier, vol. 157(C), pages 1035-1045.

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