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    Formation of nascent char structure during the fast pyrolysis of mallee wood and low-rank coals

    232241_232241.pdf (1012.Kb)
    Access Status
    Open access
    Authors
    Zhang, L.
    Li, T.
    Quyn, D.
    Dong, Li
    Qiu, P.
    Li, Chun-Zhu
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, L. and Li, T. and Quyn, D. and Dong, L. and Qiu, P. and Li, C. 2015. Formation of nascent char structure during the fast pyrolysis of mallee wood and low-rank coals. Fuel. 150: pp. 486-492.
    Source Title
    Fuel
    DOI
    10.1016/j.fuel.2015.02.066
    ISSN
    0016-2361
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/16520
    Collection
    • Curtin Research Publications
    Abstract

    The structural evolution of nascent chars during the fast pyrolysis of a wood and two low-rank coals was investigated in this study. Western Australian Collie sub-bituminous coal, Victorian Loy Yang brown coal and Western Australian mallee wood were pyrolysed in a wire-mesh reactor that is capable of providing rapid heating rates (up to 5000 K s−1) and accurate holding time (in increments of 10 ms) at peak temperature. FT-Raman spectroscopy was used to characterise the key structural features of raw fuels and nascent chars. The combined use of a wire-mesh reactor and a FT-Raman spectroscopy has given insights into the structural transformation from coal/biomass to nascent chars. There were insignificant changes in the aromatic ring systems of two coals during the initial fast heating from room temperature to 600 °C. During holding at 600 °C, the changes that occurred in ring systems for the three fuels were different. Mallee wood and Loy Yang coal underwent more changes than Collie coal. In addition, mallee wood had ring condensation during holding at 600 °C up to 30s. However, little growth in large aromatic rings of two coals was observed during holding at 600 °C up to 50 s.

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