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On mixing and demulsifier performance in oil sands froth treatment

  • Author / Creator
    Laplante, Patrick Georges
  • The impact of mixing on diluted bitumen de-watering is studied in two stages using a fractional factorial design of experiments. The first stage evaluates the relative effects of bulk demulsifier dosage, local maximum energy dissipation, and mixing time. The second stage of experiments evaluates the relative effects of bulk demulsifier dosage, local maximum energy dissipation, mixing time, and the injection concentration of the demulsifier. Shaker table results did not compare well with results obtained using a stirred tank. A shear and sedimentation test cell (SSTC) is designed to conduct mixing and settling in the same vessel while providing a large ratio of impeller volume to tank volume. The bulk concentration of demulsifier is the dominant effect, but favourable levels of local maximum energy dissipation, mixing time, and injection concentration are necessary to optimize demulsifier performance. Solids removal is shown to be a function of water removal.

  • Subjects / Keywords
  • Graduation date
    2011-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R3QF0V
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
    English
  • Institution
    University of Alberta
  • Degree level
    Master's
  • Department
    • Department of Chemical and Materials Engineering
  • Supervisor / co-supervisor and their department(s)
    • Kresta, Suzanne (Chemical and Materials Engineering)
  • Examining committee members and their departments
    • Liu, Qingxia (Chemical and Materials Engineering)
    • Buchanan, Ian (Civil and Environmental Engineering)