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Low Temperature Visbreaking

  • Author / Creator
    Wang, Lin
  • In industrial visbreaking processes, the conversion typically takes place at ~450 °C and the extent of conversion is limited by the coking propensity of the feed. Some of the older literature on bitumen upgrading reported that it was possible to substantially upgrade the straight run product at lower temperatures. In this study, the efforts were made to explore the thermal cracking behavior of oil sands bitumen at low temperature. Four temperatures were performed: 340 °C, 360 °C, 380 °C and 400 °C. In this study, a new hypothesis formulated - light gases formed during visbreaking could also suppress coke formation which was investigated by varying the pressures or batch/semi-batch operations. All the reactions occur during visbreaking depend on three operating variables: pressure, time and temperature. The inverse relationship between time and temperature broke down at low temperatures.

  • Subjects / Keywords
  • Graduation date
    2013-11
  • Type of Item
    Thesis
  • Degree
    Master of Science
  • DOI
    https://doi.org/10.7939/R36688W18
  • 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
  • Specialization
    • Chemical Engineering
  • Supervisor / co-supervisor and their department(s)
    • de Klerk, Arno (Chemical and Materials Engineering)
    • Prasad, Vinay (Chemical and Materials Engineering)
  • Examining committee members and their departments
    • Nazemifard, Neda (Chemical and Materials Engineering)
    • de Klerk, Arno (Chemical and Materials Engineering)
    • Gupta, Rajender (Chemical and Materials Engineering)
    • Prasad, Vinay (Chemical and Materials Engineering)