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Alkylation of Asphaltenes [PDF]
, 2015 This work investigated different acid catalysts and olefinic alkylating agents for the alkylation of an industrial asphaltenes feed. The working hypothesis was that alkylation would change the solubility parameter and increase the H/C ratio of asphaltenes sufficiently to cause some asphaltenes to maltenes conversion.
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Asphaltene Prediction and Prevention: A Strategy to Control Asphaltene Precipitation
SPE/PAPG Annual Technical Conference, 2012ABSTRACT Asphaltene Precipitation and Deposition is a serious problem which can reduce the oil recovery by reducing reservoir permeability and altering the wettability. It can plug wells and flow lines through deposition and also cause separation difficulties at the separation facilities.
Muhammad Ali Buriro +1 more
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The Role of Asphaltene Solubility and Chemical Composition on Asphaltene Aggregation
Petroleum Science and Technology, 2003Abstract Asphaltenes from four different crude oils (Arab Heavy, B6, Canadon Seco, and Hondo) were fractionated in mixtures of heptane and toluene and analyzed by small angle neutron scattering (SANS). Fractionation appeared to concentrate the most polar species into the least soluble sub-fraction as indicated by elemental analysis.
Keith L. Gawrys +2 more
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2017
Asphaltenes are the heaviest constituents of crude oil. The bottom of the bottom of the barrel is a complex mixture of macromolecules containing heteroatomic moieties. Although exhibiting high molecular weight, these molecules do not form a continuum as other hydrocarbon classes do.
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Asphaltenes are the heaviest constituents of crude oil. The bottom of the bottom of the barrel is a complex mixture of macromolecules containing heteroatomic moieties. Although exhibiting high molecular weight, these molecules do not form a continuum as other hydrocarbon classes do.
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1964
High-quality roofing asphalts are found to contain high-molecular-weight asphaltenes which exhibit a high tolerance for saturates and have a low carbon-to-hydrogen (C/H) ratio. These asphaltenes are believed to possess a few long, paraffinic side chains rather than many short chains or naphthenic groups. Evidence supporting this hypothesis was provided
T. Deahl, J. Illman
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High-quality roofing asphalts are found to contain high-molecular-weight asphaltenes which exhibit a high tolerance for saturates and have a low carbon-to-hydrogen (C/H) ratio. These asphaltenes are believed to possess a few long, paraffinic side chains rather than many short chains or naphthenic groups. Evidence supporting this hypothesis was provided
T. Deahl, J. Illman
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Influence of Asphaltene Inhibitors on Wax and Asphaltene Deposition - Are Problems Associated?
Day 3 Thu, October 31, 2019, 2019Abstract Organic deposition formed at high temperatures in oil and gas production systems is commonly linked to instability of asphaltenes. Recent studies revealed that deposits collected in offshore production wells produced in Gulf of Mexico exhibited compositional variation pointing to a more complex fouling process than solely ...
Janaina I. S. Aguiar +2 more
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Guide to Asphaltene Solubility
Energy & Fuels, 2015A guide to the solubility of asphaltenes in a range of solvents is constructed through the use of an association model to account for asphaltene nanoaggregation and its effect on phase behavior and Hildebrand solubility parameters to model interactions between aggregates and solvent.
Jack Youtcheff +2 more
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Asphaltene and asphaltene precipitation/deposition
2021Ali Ghamartale +3 more
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2016
Asphaltene constituents are best known for the problems they cause as solid deposits that obstruct flow in the petroleum production systems and refining as well as the formation of coke during processing. Asphaltene separation (phase-separation) can also be a cause of asphalt instability.
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Asphaltene constituents are best known for the problems they cause as solid deposits that obstruct flow in the petroleum production systems and refining as well as the formation of coke during processing. Asphaltene separation (phase-separation) can also be a cause of asphalt instability.
openaire +2 more sources