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Permanent link (DOI): https://doi.org/10.7939/R36688W18

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Low Temperature Visbreaking Open Access

Descriptions

Other title
Subject/Keyword
Low Temerature
Visbreaking
Bitumen
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Wang, Lin
Supervisor and department
de Klerk, Arno (Chemical and Materials Engineering)
Prasad, Vinay (Chemical and Materials Engineering)
Examining committee member and department
Gupta, Rajender (Chemical and Materials Engineering)
de Klerk, Arno (Chemical and Materials Engineering)
Nazemifard, Neda (Chemical and Materials Engineering)
Prasad, Vinay (Chemical and Materials Engineering)
Department
Department of Chemical and Materials Engineering
Specialization
Chemical Engineering
Date accepted
2013-09-30T15:54:02Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
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.
Language
English
DOI
doi:10.7939/R36688W18
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
Zachariah, A., Wang, L., Yang, S., Prasad, V., de Klerk, A. Suppression of coke formation during bitumen pyrolysis. Energy Fuels 2013, 27(6), pp 3061-3070.

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