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Catalytic hydrodeoxygenation of crude bio-oil in supercritical methanol using supported nickel catalysts

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  • Shafaghat, Hoda
  • Kim, Ji Man
  • Lee, In-Gu
  • Jae, Jungho
  • Jung, Sang-Chul
  • Park, Young-Kwon

Abstract

Pyrolysis oil (bio-oil) consists of high water content and vast variety of oxygenates (acids, alcohols, aldehydes, esters, ketones, sugars and phenols), causing some undesirable properties that prevent the direct use of bio-oil as a transportation fuel. Bio-oil upgrading to decrease its oxygen content provides a sustainable fuel that can be considered a valuable substitution for depleting fossil fuels. Catalytic hydrodeoxygenation (HDO) is an efficient method for bio-oil upgrading. This paper presents the HDO of crude bio-oil in supercritical fluid (ethanol, methanol, and 2-propanol) using a batch high pressure reactor. Supercritical fluids have unique physicochemical properties of liquid-like density and gas-like high diffusivity and low viscosity. The upgrading efficiency was evaluated by measuring the elemental composition (CHNSO), water content, carbon residue, and high heating value (HHV) of the bio-oil upgraded over Ni/HBeta catalyst. Compared to ethanol and 2-propanol, supercritical methanol resulted in a higher decrease in the oxygen content of bio-oil. The activity of Ni/HBeta was examined by varying the Ni loading (5–20 wt%), initial hydrogen pressure (10–30 bar), and reaction time (2–6 h). Meanwhile, effects of support materials (HZSM-5, HBeta, HY, Al-SBA-15, and silylated HBeta) on the performance of nickel catalyst in bio-oil upgrading were investigated using supercritical methanol.

Suggested Citation

  • Shafaghat, Hoda & Kim, Ji Man & Lee, In-Gu & Jae, Jungho & Jung, Sang-Chul & Park, Young-Kwon, 2019. "Catalytic hydrodeoxygenation of crude bio-oil in supercritical methanol using supported nickel catalysts," Renewable Energy, Elsevier, vol. 144(C), pages 159-166.
    • Handle: RePEc:eee:renene:v:144:y:2019:i:c:p:159-166
    DOI: 10.1016/j.renene.2018.06.096
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    References listed on IDEAS

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    1. Zhang, Qing & Xu, Ying & Li, Yuping & Wang, Tiejun & Zhang, Qi & Ma, Longlong & He, Minghong & Li, Kai, 2015. "Investigation on the esterification by using supercritical ethanol for bio-oil upgrading," Applied Energy, Elsevier, vol. 160(C), pages 633-640.
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    Cited by:

    1. Hasan, M.M. & Rasul, M.G. & Ashwath, N. & Khan, M.M.K. & Jahirul, M.I., 2022. "Fast pyrolysis of Beauty Leaf Fruit Husk (BLFH) in an auger reactor: Effect of temperature on the yield and physicochemical properties of BLFH oil," Renewable Energy, Elsevier, vol. 194(C), pages 1098-1109.
    2. Zhang, Xing & Wang, Kaige & Chen, Junhao & Zhu, Lingjun & Wang, Shurong, 2020. "Mild hydrogenation of bio-oil and its derived phenolic monomers over Pt–Ni bimetal-based catalysts," Applied Energy, Elsevier, vol. 275(C).
    3. Fang, Jun & Liu, Zhuangzhuang & Luan, Hui & Liu, Fen & Yuan, Xingzhong & Long, Shundong & Wang, Andong & Ma, Yong & Xiao, Zhihua, 2021. "Thermochemical liquefaction of cattle manure using ethanol as solvent: Effects of temperature on bio-oil yields and chemical compositions," Renewable Energy, Elsevier, vol. 167(C), pages 32-41.
    4. Qian, Lili & Wang, Shuzhong & Savage, Phillip E., 2020. "Fast and isothermal hydrothermal liquefaction of sludge at different severities: Reaction products, pathways, and kinetics," Applied Energy, Elsevier, vol. 260(C).

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