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Liquefaction of wood in two successive steps: solvolysis in ethylene-glycol and catalytic hydrotreatment

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  • Rezzoug, Sid-Ahmed
  • Capart, Richard

Abstract

The purpose of this paper is to describe a process of wood liquefaction in two steps: a first step of wood solvolysis in acidified ethylene-glycol or in some recycled solvent; a second step of catalytic hydrogenation at high pressure of the solvolysis liquid product. For the solvolysis step, the liquefaction yield is limited by the acidity of reactant media and by the formation of a coke-like residue. A kinetic model of solvolysis is proposed accounting for the production of the coke-like residue. When using recycled solvolytic oil instead of fresh ethylene-glycol, the conversion into liquid is also reduced and the viscosity of the solution strongly increases. The step of hydrogenation was investigated by varying different parameters, i.e., the nature of the catalyst, the initial hydrogen pressure (30-60-90 MPa), the maximal temperature of plateau (from 330 to 400 °C) and the ratio tetralin/solvolytic oil. A slightly better deoxygenating rate is obtained by using a Ni-Mo bi-functional catalyst. The deoxygenation rate increases with the tetralin/solvolytic oil ratio and a minimum value of 0.5 for this ratio is necessary to prevent the unwanted formation of a solid residue. After hydrogenation, an upgraded oil is obtained with a heating value similar to that of a usual petroleum fuel.

Suggested Citation

  • Rezzoug, Sid-Ahmed & Capart, Richard, 2002. "Liquefaction of wood in two successive steps: solvolysis in ethylene-glycol and catalytic hydrotreatment," Applied Energy, Elsevier, vol. 72(3-4), pages 631-644, July.
    • Handle: RePEc:eee:appene:v:72:y:2002:i:3-4:p:631-644
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    Citations

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    Cited by:

    1. Zhu, Zhe & Rosendahl, Lasse & Toor, Saqib Sohail & Yu, Donghong & Chen, Guanyi, 2015. "Hydrothermal liquefaction of barley straw to bio-crude oil: Effects of reaction temperature and aqueous phase recirculation," Applied Energy, Elsevier, vol. 137(C), pages 183-192.
    2. Jerome A. Ramirez & Richard J. Brown & Thomas J. Rainey, 2015. "A Review of Hydrothermal Liquefaction Bio-Crude Properties and Prospects for Upgrading to Transportation Fuels," Energies, MDPI, vol. 8(7), pages 1-30, July.
    3. Kinata, Silao Espérance & Loubar, Khaled & Paraschiv, Maria & Tazerout, Mohand & Belloncle, Christophe, 2014. "Catalytic hydroliquefaction of charcoal CCB (copper, chromium and boron)-treated wood for bio-oil production: Influence of CCB salts, residence time and catalysts," Applied Energy, Elsevier, vol. 115(C), pages 57-64.
    4. Buffi, Marco & Seljak, Tine & Cappelletti, Alessandro & Bettucci, Lorenzo & Valera-Medina, Agustin & Katrašnik, Tomaž & Chiaramonti, David, 2018. "Performance and emissions of liquefied wood as fuel for a small scale gas turbine," Applied Energy, Elsevier, vol. 230(C), pages 1193-1204.
    5. Seljak, Tine & Rodman Oprešnik, Samuel & Katrašnik, Tomaž, 2014. "Microturbine combustion and emission characterisation of waste polymer-derived fuels," Energy, Elsevier, vol. 77(C), pages 226-234.
    6. Yang Han & Kent Hoekman & Umakanta Jena & Probir Das, 2019. "Use of Co-Solvents in Hydrothermal Liquefaction (HTL) of Microalgae," Energies, MDPI, vol. 13(1), pages 1-23, December.
    7. Yongsheng Zhang & Jamie Minaret & Zhongshun Yuan & Animesh Dutta & Chunbao (Charles) Xu, 2018. "Mild Hydrothermal Liquefaction of High Water Content Agricultural Residue for Bio-Crude Oil Production: A Parametric Study," Energies, MDPI, vol. 11(11), pages 1-13, November.
    8. Zhang, Hairong & Yang, Huijuan & Guo, Haijun & Huang, Chao & Xiong, Lian & Chen, Xinde, 2014. "Kinetic study on the liquefaction of wood and its three cell wall component in polyhydric alcohols," Applied Energy, Elsevier, vol. 113(C), pages 1596-1600.

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