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    Changes in char reactivity due to char-oxygen and char-steam reactions using victorian brown coal in a fixed-bed reactor

    Access Status
    Fulltext not available
    Authors
    Zhang, Shu
    Luo, Y.
    Li, Chun-Zhu
    Wang, Y.
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Zhang, S. and Luo, Y. and Li, C. and Wang, Y. 2015. Changes in char reactivity due to char-oxygen and char-steam reactions using victorian brown coal in a fixed-bed reactor. Chinese Journal of Chemical Engineering. 23 (1): pp. 321-325.
    Source Title
    Chinese Journal of Chemical Engineering
    DOI
    10.1016/j.cjche.2014.09.044
    ISSN
    1004-9541
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/18505
    Collection
    • Curtin Research Publications
    Abstract

    This study was to examine the influence of reactions of char–O2 and char–steam on the char reactivity evolution. A newly-designed fixed-bed reactor was used to conduct gasification experiments using Victorian brown coal at 800 °C. The chars prepared from the gasification experiments were then collected and subjected to reactivity characterisation (ex-situ reactivity) using TGA (thermogravimetric analyser) in air. The results indicate that the char reactivity from TGA was generally high when the char experienced intensive gasification reactions in 0.3% O2 in the fixed-bed reactor. The addition of steam into the gasification not only enhanced the char conversion significantly but also reduced the char reactivity dramatically. The curve shapes of the char reactivity with involvement of steam were very different from that with O2 gasification, implying the importance of gasifying agents to char properties.

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