• myGriffith
    • Staff portal
    • Contact Us⌄
      • Future student enquiries 1800 677 728
      • Current student enquiries 1800 154 055
      • International enquiries +61 7 3735 6425
      • General enquiries 07 3735 7111
      • Online enquiries
      • Staff phonebook
    View Item 
    •   Home
    • Griffith Theses
    • Theses - Higher Degree by Research
    • View Item
    • Home
    • Griffith Theses
    • Theses - Higher Degree by Research
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

  • All of Griffith Research Online
    • Communities & Collections
    • Authors
    • By Issue Date
    • Titles
  • This Collection
    • Authors
    • By Issue Date
    • Titles
  • Statistics

  • Most Popular Items
  • Statistics by Country
  • Most Popular Authors
  • Support

  • Contact us
  • FAQs
  • Admin login

  • Login
  • Dispersive Diffusion of Gas in Coal: An Experimental Investigation into the Fundamentals of Gas Sorption and Diffusion in Coal

    Thumbnail
    View/Open
    Staib_2014_02Thesis.pdf (8.171Mb)
    Author(s)
    Staib, Gregory R.
    Primary Supervisor
    Gray, Evan
    Other Supervisors
    Webb, Jim
    Sakurovs, Richard
    Year published
    2014
    Metadata
    Show full item record
    Abstract
    Gas diffusion in coals plays an important role in enhanced coalbed methane production, but a consistent picture of diffusion behaviour in coals is yet to emerge. There is no agreement on the most appropriate model, pressure dependence of diffusion coefficients, or the physical explanation to why CH4 diffusion is slower than CCh. The aim of the work towards this Thesis is to determine sorption kinetics more accurately, model them more systematically over a wider range of experimental conditions and resolve discrepancies present in the literature to explain (i) why uptake of gas in coal takes a considerable ...
    View more >
    Gas diffusion in coals plays an important role in enhanced coalbed methane production, but a consistent picture of diffusion behaviour in coals is yet to emerge. There is no agreement on the most appropriate model, pressure dependence of diffusion coefficients, or the physical explanation to why CH4 diffusion is slower than CCh. The aim of the work towards this Thesis is to determine sorption kinetics more accurately, model them more systematically over a wider range of experimental conditions and resolve discrepancies present in the literature to explain (i) why uptake of gas in coal takes a considerable amount of time and (ii) why C02 sorbs faster than CH4. A manometric sorption system was constructed that was optimized for uptake rate measurements. This was used to study the effects of coal-type, particle size, gas-type and mixture, and temperature on sorption kinetics. A gravimetric apparatus was also utilised to measure isotherms for different gases at different fractions of the same coaL Further work combined manometric uptake rate measurements with Small Angle X-Ray Scattering (SAXS) along with an analysis of previously obtained sorption-induced coal swelling kinetic data.
    View less >
    Thesis Type
    Thesis (PhD Doctorate)
    Degree Program
    Doctor of Philosophy (PhD)
    School
    School of Biomolecular and Physical Sciences
    DOI
    https://doi.org/10.25904/1912/1103
    Copyright Statement
    The author owns the copyright in this thesis, unless stated otherwise.
    Item Access Status
    Public
    Subject
    Gas diffusion
    Manometric sorption system
    Coal seam gas
    CH4 diffusion
    Publication URI
    http://hdl.handle.net/10072/365814
    Collection
    • Theses - Higher Degree by Research

    Footer

    Disclaimer

    • Privacy policy
    • Copyright matters
    • CRICOS Provider - 00233E

    Tagline

    • Gold Coast
    • Logan
    • Brisbane - Queensland, Australia
    First Peoples of Australia
    • Aboriginal
    • Torres Strait Islander