• Login
    View Item 
    •   NWU-IR Home
    • Research Output
    • Faculty of Natural and Agricultural Sciences
    • View Item
    •   NWU-IR Home
    • Research Output
    • Faculty of Natural and Agricultural Sciences
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    The influence of the roof and floor geological structures on the ash composition produced from coal at UCG temperatures

    Thumbnail
    Date
    2020
    Author
    Uwaoma, R.C.
    Strydom, C.A.
    Matjie, R.H.
    Bunt, J.R.
    Van Dyk, J.C.
    Metadata
    Show full item record
    Abstract
    The mineralogy of the ash and slag formed at typical UCG temperatures were investigated using a bituminous coal from the Theunissen UCG site in the Free State province of South Africa. The ash and slag samples were produced from the coal, and the surrounding roof and floor geological structures at 1000, 1100, 1200 and 1300°C. XRD results show an increase in crystalline phases, with a decrease in the amorphous content as the temperature increases, with mullite and quartz found to be the dominant minerals in the crystalline phase. FTIR spectroscopy results reveal the appearance of peaks related to the crystalline phase of mullite with increasing temperature. SEM results show the formation of spherical particles, with the appearance of cenospheres, as the temperature increases. The samples produced at 1000°C had significantly lower surface area and porosity values than the blended coal sample, but these values remain similar for the ash samples produced between 1000°C and 1300°C, where only slight decreases are observed with an increase in temperature. Results indicate that the higher the temperature in a UCG cavity, the less leaching of inorganic species should occur
    URI
    http://hdl.handle.net/10394/28550
    https://www.tandfonline.com/doi/full/10.1080/19392699.2018.1479260
    https://doi.org/10.1080/19392699.2018.1479260
    Collections
    • Faculty of Engineering [1136]
    • Faculty of Natural and Agricultural Sciences [4855]

    Copyright © North-West University
    Contact Us | Send Feedback
    Theme by 
    Atmire NV
     

     

    Browse

    All of NWU-IR Communities & CollectionsBy Issue DateAuthorsTitlesSubjectsAdvisor/SupervisorThesis TypeThis CollectionBy Issue DateAuthorsTitlesSubjectsAdvisor/SupervisorThesis Type

    My Account

    LoginRegister

    Copyright © North-West University
    Contact Us | Send Feedback
    Theme by 
    Atmire NV