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    Iron nanoparticles in situ encapsulated in biochar-based carbon as an effective catalyst for the conversion of biomass-derived syngas to liquid hydrocarbons

    Access Status
    Fulltext not available
    Authors
    Yan, Q.
    Wan, C.
    Liu, Jian
    Gao, J.
    Yu, F.
    Zhang, J.
    Cai, Z.
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Yan, Q. and Wan, C. and Liu, J. and Gao, J. and Yu, F. and Zhang, J. and Cai, Z. 2013. Iron nanoparticles in situ encapsulated in biochar-based carbon as an effective catalyst for the conversion of biomass-derived syngas to liquid hydrocarbons. Green Chemistry. 15 (6): pp. 1631-1640.
    Source Title
    Green Chemistry
    DOI
    10.1039/c3gc37107g
    ISSN
    1463-9262
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/52572
    Collection
    • Curtin Research Publications
    Abstract

    Biochar, a by-product from the fast pyrolysis of pine wood, was used as the support material for the synthesis of carbon-encapsulated iron nanoparticles. The nanoparticles were characterized for physicochemical properties by multiple morphological and structural methods (e.g., SEM, TEM, XRD, FTIR, and TPD). The Fischer-Tropsch synthesis (FTS) process was carried out to evaluate the catalytic activity of the nanoparticles on conversion of biomass-derived synthesis gas (bio-syngas) to liquid hydrocarbons. Characterization results revealed that the nanoparticles had core-shell structures with iron in situ encapsulated within a graphitic shell. Moreover, significant amounts of iron carbide (mainly Fe3C) were formed as an interface between the carbonaceous shell and the iron core. FTS tests indicated that such carbon-encapsulated iron nanoparticles possessed a high activity on conversion of bio-syngas and good selectivity towards liquid hydrocarbons (of which olefins were the dominant product). Over a 1500 h testing period, the nanoparticles showed striking stability against deactivation, with CO conversion maintained at about 95% and liquid hydrocarbon selectivity at about 68%.

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