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    Upgrading of bio-oil into advanced biofuels and chemicals, Part III: Changes in aromatic structure and coke forming propensity during the catalytic hydrotreatment of a fast pyrolysis bio-oil with Pd/C catalyst

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    Authors
    Li, X.
    Gunawan, Richard
    Wang, Y.
    Chaiwat, W.
    Hu, Xun
    Gholizadeh, M.
    Mourant, D.
    Bromly, John
    Li, Chun-Zhu
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, Xiang and Gunawan, Richard and Wang, Yi and Chaiwat, Weerawut and Hu, Xun and Gholizadeh, Mortaza and Mourant, Daniel and Bromly, John and Li, Chun-Zhu. 2013. Upgrading of bio-oil into advanced biofuels and chemicals, Part III: Changes in aromatic structure and coke forming propensity during the catalytic hydrotreatment of a fast pyrolysis bio-oil with Pd/C catalyst. Fuel. 116: pp. 642-649.
    Source Title
    Fuel
    DOI
    10.1016/j.fuel.2013.08.046
    ISSN
    0016-2361
    URI
    http://hdl.handle.net/20.500.11937/42536
    Collection
    • Curtin Research Publications
    Abstract

    This study has investigated the hydrotreatment of bio-oil (derived from the fast pyrolysis of mallee woody biomass) in a batch reactor under 10 MPa pressure with Pd/C catalyst at temperatures between 150 °C and 300 °C. Our results indicate that the chemical fractions, coking tendency as well as the aromatic structures are highly influenced by the hydrotreating conditions such as temperature and time. The repolymerisation surpasses the hydrogenation of bio-oil at the low hydrotreating temperatures (e.g. 150–200 °C) and short hydrotreating durations (e.g. <3 h). On the contrary, high hydrotreating temperatures (e.g. 250–300 °C) and long reaction durations (e.g. 6–12 h) can effectively convert the heavier fractions into lighter fractions, and thus further reduce the coking tendency of the hydrotreated products. However, these harsh operational conditions cannot decrease the number of large aromatic ring systems. Most importantly, it is found that the combination of esterification and hydrotreatment can produce more stable bio-oil with lower coking tendency and less large aromatic ring systems than the direct hydrotreatment of bio-oil.

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