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    Tar reforming using char as catalyst during pyrolysis and gasification of Shengli brown coal

    Access Status
    Fulltext not available
    Authors
    Wang, F.
    Zhang, Shu
    Chen, Z.
    Liu, C.
    Wang, Y.
    Date
    2014
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wang, F. and Zhang, S. and Chen, Z. and Liu, C. and Wang, Y. 2014. Tar reforming using char as catalyst during pyrolysis and gasification of Shengli brown coal. Journal of Analytical and Applied Pyrolysis. 105: pp. 269-275.
    Source Title
    Journal of Analytical and Applied Pyrolysis
    DOI
    10.1016/j.jaap.2013.11.013
    ISSN
    0165-2370
    School
    Fuels and Energy Technology Institute
    URI
    http://hdl.handle.net/20.500.11937/55944
    Collection
    • Curtin Research Publications
    Abstract

    Coal chars were employed to catalyze the in situ tar reforming reactions during the pyrolysis and gasification of Shengli brown coal in a two-stage quartz reactor at different temperatures. Two different chars as catalysts were prepared. One (inactivated char) was prepared from decomposing brown coal in inert atmosphere while the other one (activated char) was obtained with additional 10 min steam activation. It was found that the activated char as catalyst has shown a much better catalytic performance for tar reduction than the inactivated char, especially for the tars from the gasification conditions. The catalytic reforming reactions could also cause the increase in the proportion of large aromatic rings in tars, whereas the presence of steam in the reaction zone could see the decrease of large aromatic rings in tars. The catalysts were characterized by SEM, EDX, BET, XRD and Raman, indicating that the high activity of activated char should be mainly attributed to its amorphous carbon structure, large surface area and abundant metal species (e.g. Na, K, Ca and Mg) on its surface. © 2013 Elsevier B.V. All rights reserved.

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