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Skip to Search Results- 68Graduate and Postdoctoral Studies (GPS), Faculty of
- 68Graduate and Postdoctoral Studies (GPS), Faculty of/Theses and Dissertations
- 2Helmholtz-Alberta Initiative
- 2Helmholtz-Alberta Initiative/Journal Articles & Research Abstracts (Helmholtz-Alberta Initiative)
- 2Chemistry, Department of
- 2Chemistry, Department of/Journal Articles (Chemistry)
- 6Xu, Zhenghe (Chemical and Materials Engineering)
- 4Liu, Qingxia (Chemical and Materials Engineering)
- 3Choi, Phillip (Chemical and Materials Engineering)
- 3Gupta, Rajender (Chemical and Materials Engineering)
- 3Zeng, Hongbo (Chemical and Materials Engineering)
- 3Zhang, Hao (Chemical and Materials Engineering)
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Spring 2017
In this research, flocculation of fractionated asphaltenes was studied using dynamic light scattering (DLS). Three asphaltene fractions were obtained based on its adsorption characteristics onto calcium carbonate. The DLS results showed that the irreversibly-adsorbed asphaltenes (Irr-Ads),...
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Probing the Molecular Interactions of Asphaltenes in Organic Solvents Using a Surface Forces Apparatus
DownloadSpring 2014
A fundamental understanding of the stability of water-in-bitumen emulsions stabilized by surface active agents requires a good description of the molecular interactions between the different materials in contact. Of these surface active agents, asphaltenes and oil contaminated fine solids are...
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Pyrolysis of asphaltenes in an atmospheric entrained flow reactor: A study on gasification reactivity and properties of chars
DownloadFall 2014
Solvent deasphalting, followed by asphaltenes gasification, has been recommended as a favorable alternative to coker based upgrading processes. However, very limited work has been carried out on pyrolysis and gasification of asphaltenes, at entrained flow conditions. The present work aims at...
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Rheological behavior and nano-microstructure of complex fluids: Biomedical and Bitumen-Heavy oil applications
DownloadFall 2010
The main objective of this research was to exploit the interrelations between the rheological behavior and nano-microstructure of complex fluids in solving two state-of-the-art problems, one in the field of biomedical engineering: controlling the amount and characteristics of bioaerosol droplets...
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Rheology of Bitumen at the Onset of Asphaltene Aggregation and its Effects on the Stability of Water-in-Oil Emulsion
DownloadFall 2015
Asphaltenes are the heaviest fraction of bitumen. Asphaltenes not only play an important role in the high viscosity of bitumen but also in the water-in-oil (W/O) emulsion stability. Nevertheless, their exact function in the stability mechanism of W/O emulsion still remains unresolved. It is...
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Scalable and Concise Approaches for the Synthesis of "Archipelago Model" Asphaltene Compounds
DownloadFall 2015
Asphaltenes constitute the most difficult sub-class of bitumen with regards to upgradability. This is due to their complex and variable structure, higher average molecular weight, and inclusion of polar functionalities. These structural traits instigate intermolecular attractions that lead to...
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Fall 2011
Liquid crystalline domains were observed in fractions of heavy petroleum. Through a combination of polarized light microscopy and Photoacoustic Infrared Spectroscopy, liquid crystals were shown to form on the exterior surface of their parent materials. Analysis of materials using Differential...
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Spring 2016
Asphaltenes are a solubility class and it is the material in oil that is insoluble in a paraffinic matrix. It is a major contributor to problems in many petroleum operations such as production, transportation, refining, precipitation, crude oil emulsification, and de-emulsification, and high...
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Spring 2010
Most crude oils contain traces of vanadyl porphyrins within their asphaltene fraction. Although these metals are only present in trace quantities, they have a significant detrimental impact on crude oil processing units; therefore, their selective removal is highly desirable. The current work...