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    Effect of Cellulose Crystallinity on Solid/Liquid Phase Reactions Responsible for the Formation of Carbonaceous Residues during Pyrolysis

    Access Status
    Fulltext not available
    Authors
    Wang, Z.
    Pecha, B.
    Westerhof, Roel
    Kersten, S.
    Li, Chun-Zhu
    McDonald, A.
    Garcia-Perez, M.
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Wang, Z. and Pecha, B. and Westerhof, R. and Kersten, S. and Li, C. and McDonald, A. and Garcia-Perez, M. 2014. Effect of Cellulose Crystallinity on Solid/Liquid Phase Reactions Responsible for the Formation of Carbonaceous Residues during Pyrolysis. Industrial & Engineering Chemistry Research. 53: pp. 2490-2955.
    Source Title
    Industrial & Engineering Chemistry Research
    DOI
    10.1021/ie4014259
    ISSN
    0888-5885
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/30269
    Collection
    • Curtin Research Publications
    Abstract

    This study reports changes in solid phase composition when samples of Avicel cellulose (crystallinity: 60.5%) and ball-milled microcrystalline cellulose (crystallinity: 6.5%) were subjected to pyrolysis in a spoon reactor. Solid state chemistry evolution was examined by hydrolysis-ion exchange chromatography, scanning electron miscroscopy (SEM), Fourier transforminfrared (FTIR), and 13C nuclear magnetic resonance (NMR). The liquid reaction intermediate was found to cause particle agglomeration at temperatures below 300 °C. At higher temperatures, the ball-milled cellulose melted completely but the more crystalline cellulose conserved its fibrous structure. The formation of C?O and C?C groups was accelerated by the presence ofliquid intermediates derived from the amorphous cellulose. The content of cross-linked cellulose was quantified by the combined use of acid hydrolysis and 13C NMR. A new reaction mechanism to describe the changes in the solid residue composition at different reaction conditions is proposed.

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