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    Destruction of tar during volatile-char interactions at low temperature

    Access Status
    Fulltext not available
    Authors
    Song, Yao
    Zhao, Y.
    Hu, X.
    Zhang, Lei
    Sun, S.
    Li, C.
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Song, Y. and Zhao, Y. and Hu, X. and Zhang, L. and Sun, S. and Li, C. 2018. Destruction of tar during volatile-char interactions at low temperature. Fuel Processing Technology. 171: pp. 215-222.
    Source Title
    Fuel Processing Technology
    DOI
    10.1016/j.fuproc.2017.11.023
    ISSN
    0378-3820
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/59453
    Collection
    • Curtin Research Publications
    Abstract

    This study aims to investigate the mechanisms of tar destruction during volatile-char interactions at low temperature (400–700 °C). A bio-char was subjected to interactions with biomass volatiles at different temperatures (400–700 °C). The results indicate that tar is converted into gaseous and solid products (coke) during volatile-char interactions and the proportion of coke formed on the bio-char from the total converted tar steadily increases with increasing temperature. The non-aromatic structures (e.g. aliphatic and/or O-containing structures) in tar are mainly converted into gases by catalytic cracking and/or reforming reactions on char, while the aromatic structures in tar primarily go through condensation/polymerisation reactions to form coke on char surface. The UV-fluorescence spectroscopic results imply that the non-aromatic structures in tar are easier converted on char than aromatic structures at low temperature (e.g. 400–500 °C) and the conversion of aromatic stru ctures through coke formation on char will be enhanced at higher temperature (e.g. 600–700 °C). The Raman spectroscopic results show that some O-containing species in tar molecules are transferred to the char and form additional O-containing structures into the entire char matrix during the volatile-char interactions.

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