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Skip to Search Results- 1Ahmed, Nirob
- 1Amundarain, Jesus
- 1Ansari, Nesma Nasir
- 1Berahman, Behnam
- 1Cardozo, Samuel D.
- 1Carvalho do Prado, Glaucia H
- 6Xu, Zhenghe (Chemical and Materials Engineering)
- 3Gupta, Rajender (Chemical and Materials Engineering)
- 3Liu, Qingxia (Chemical and Materials Engineering)
- 3Zeng, Hongbo (Chemical and Materials Engineering)
- 2Gray, Murray R. (Chemical and Materials Engineering)
- 2Stryker, Jeffrey M (Chemistry)
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Fall 2012
Unwanted phase separation of asphaltenes poses significant challenges in production and processing of heavy oils and bitumen. The analysis and prediction of asphaltene precipitation behaviors and asphaltene-diluent interactions are typically treated either from a solution thermodynamics or a...
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Fall 2021
Oilsands bitumen produced from Alberta, Canada contains 14–20 wt.% n-pentane insoluble asphaltenes. Separation of asphaltenes from the bitumen by solvent deasphalting has the benefit of improving the properties of the deasphalted oil compared to the bitumen, for example, by decreasing its...
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Probing Challenges of Asphaltenes in Petroleum Production through Extended−SARA (E−SARA) Analysis
DownloadSpring 2019
Asphaltenes are polyaromatic compounds present in crude oils, which are defined as being soluble in aromatic solvents and insoluble in n−alkanes. The partition of self−associated asphaltene aggregates at oil−solid and oil−water interfaces is the root cause of a number of major problems...
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Probing Deformable Oil-Water Interfaces by Atomic Force Microscopy and Cascade Partial Coalescence Measurements
DownloadFall 2016
Phase separation of stable oil-in-water and water-in-oil emulsions poses major challenges for a variety of industries, including the petroleum industry. The stability and destabilizing of petroleum emulsions highly depend on interfacial properties such as surface/interfacial charges, interfacial...
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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...