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    Influence of pyrolysis conditions on macropore structure of char particles

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    Author
    Boissiere, Francois Patrice
    Date
    1993
    Advisor
    Zygourakis, Kyriacos
    Degree
    Master of Science
    Abstract
    A systematic analysis of the structure of char particles produced from an Illinois #6 coal was carried out. Coal particles were pyrolyzed in a hot-stage reactor under inert (N$\sb2$) and reactive (5% O$\sb2$ / 95% N$\sb2$) atmospheres at various heating rates (0.1, 1 and 10$\sp\circ$C/s) and final heat treatment temperatures (500 and 700$\sp\circ$C). Image analysis procedures were used to measure the size and macroporosity of the particles, and the surface area and size distribution of the macropores. High heating rates and the addition of oxygen resulted in larger particle swelling and increased the macroporosity, the surface area and the fraction of large macropores with thin walls. Heat treatment temperatures had smaller effects on char particle structure. Our data confirm the strong effects of pyrolysis conditions on char reactivity during combustion in the diffusion-limited regime. They also provide the necessary parameters for char combustion models.
    Keyword
    Chemical engineering
    Citation
    Boissiere, Francois Patrice. "Influence of pyrolysis conditions on macropore structure of char particles." (1993) Master’s Thesis, Rice University. http://hdl.handle.net/1911/13694.
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    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892