Petroleum Asphaltenes - Part 2: the Effect of Asphaltene and Resin Constituents on Recovery and Refining Processes

Speight, James G.

doi:10.2516/ogst:2004033

Cited by 57 publications

(34 citation statements)

References 34 publications

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“…The behavior of asphaltenes at oil-water interfaces has been extensively studied in order to better understand the stability of crude oil-water emulsions. These emulsions are formed during water injection in petroleum wells or when surfactants are added for oil transport [4,5]. They can be very stable when the concentration of asphaltenes is large, hence posing problems in oil-water separation methods.…”

Section: Introductionmentioning

confidence: 99%

Influence of pH on Oil-Water Interfacial Tension and Mass Transfer for Asphaltenes Model Oils. Comparison with Crude Oil Behavior

Hutin

Argillier

Langévin

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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-Asphaltenes are shown to be amphoteric, containing acidic and basic species that can ionize at low and high pH respectively when they come in contact with water. We have used a mass transfer model in order to determine the partition coefficients of asphaltenes between oil and water. We have compared the influence of type of asphaltenes on interfacial tension and on mass transfer between oil and water and analysed the influence of an added surfactant. We have also compared the behavior of asphaltenes dissolved in model solvents with that of diluted heavy crude oils. Although asphaltenes qualitatively reproduce the behavior of crude oil components at the oil-water interface, differences were observed, either in interfacial tensions at low pH, or in partition coefficients at high pH. These differences are due to other molecules present in crude oil, which are either more interfacially active or more soluble in water.Résumé -Influence du pH sur la tension interfaciale et les transferts de masse pour des huiles modèles d'asphaltènes. Comparaison avec le comportement du brut -Nous avons mis en évidence le comportement amphotère des asphaltènes, qui contiennent des espèces acides et basiques pouvant s'ioniser lorsqu'ils entrent en contact avec l'eau. Nous avons utilisé un modèle de transfert de masse afin de déterminer les coefficients de partage des asphaltènes entre l'huile et l'eau. Nous avons comparé l'influence du type d'asphaltènes sur la tension interfaciale et le transfert de masse entre l'eau et l'huile, et analysé l'influence d'un tensio-actif ajouté. Nous avons également comparé le comportement des asphaltènes dissous dans des solvants modèle avec celui d'un brut lourd dilué. Bien que les asphaltènes reproduisent qualitativement le comportement du brut dilué à l'interface huile-eau, des différences sont observées entre les tensions interfaciales à bas pH bas, et dans les coefficients de partage à pH élevé. Ces différences sont dues à d'autres molécules présentes dans le brut, qui sont soit plus interfacialement actives, soit plus solubles dans l'eau.

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Section: Introductionmentioning

confidence: 99%

Influence of pH on Oil-Water Interfacial Tension and Mass Transfer for Asphaltenes Model Oils. Comparison with Crude Oil Behavior

Hutin

Argillier

Langévin

2016

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Separation of aliphatic, aromatic, resins, and asphaltene was approved by SARA method (saturate, aromatic, resin, and asphaltene (SARA) is an analysis method that divides crude oil components according to their polarizability and polarity) (Speight 2004;Vasquez and Mansoori 2000). After extracting TPH by the aforementioned method, the residue was dissolved in 10 ml n-hexane (Merck) and filtered to separate the insoluble asphaltene.…”

Section: Fractionation Of Oilmentioning

confidence: 99%

Assessment of bioremediation of aliphatic, aromatic, resin, and asphaltene fractions of oil-sludge-contaminated soil

Minai-Tehrani

Rohanifar

Azami

2014

Int. J. Environ. Sci. Technol.

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Oil sludge is a viscous material consisting of resin, asphaltene, sand, and water, which is usually formed at the bottom of oil reservoir tanks. Asphaltene and resin contents of oil sludge make it more resistant to biodegradation. Disposal of oil sludge is the main problem of oil industry; discharge of oil sludge into the soil causes damage to the environment. Bioremediation is an efficient, cheap, and environmentally friendly method for oil-sludge treatment. The aim of this study was to investigate the biodegradation of oil-sludge fractions in contaminated soil for a period of 12 months. The oil sludge was mixed with soil with the final concentration of 5 % (w/w), and the nutrients such as phosphate and nitrate salts were added to soil. Finally, reduction of aliphatic, aromatic, resin, and asphaltene was tested. The results showed that the reduction of total petroleum hydrocarbon was 31 ± 5 % during 12 months of the treatment. About 60 ± 8 % of total aliphatic fractions, mainly C 14 -C 22 , decreased. Analysis for the detection of two, three, and four rings of polycyclic aromatic hydrocarbons demonstrated about 42 ± 3 % reduction of total aromatic fractions, whereas the resin (6 ± 0.8 %) and asphaltene (4 ± 0.5 %) fractions were slightly biodegraded. In conclusion, biotreatment of oil sludge during 12 months could well reduce aliphatic and aromatic fractions, but more time is needed for resin and asphaltene reduction.

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“…This is because asphaltene or paraffin aggregation and solid formation may occur in reservoirs and oil wells, provoking the formation of an extremely dense phase that reduces oil extraction and in many cases completely stops oil production. Also, asphaltene and paraffins deposition occurs in destabilized crude oil blends and during oil storage (Thanh et al, 1999;Speight, 1999;Srivastava et al, 2002;Speight 2004a, Speight 2004bMurgich et al, 2001;Murgichet al, 1998;Mansoori, 1997;Buenrostro-González et al, 2001;Carbognani et al, 1999;Oh & Fig. 3.…”

Section: Deposition Of Asphaltenes and Paraffinsmentioning

confidence: 99%

Current Knowledge and Potential Applications of Ionic Liquids in the Petroleum Industry

José-Alberto¹,

Jorge²

2011

Ionic Liquids: Applications and Perspectives

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Petroleum Asphaltenes - Part 2: the Effect of Asphaltene and Resin Constituents on Recovery and Refining Processes

Cited by 57 publications

References 34 publications

Influence of pH on Oil-Water Interfacial Tension and Mass Transfer for Asphaltenes Model Oils. Comparison with Crude Oil Behavior

Influence of pH on Oil-Water Interfacial Tension and Mass Transfer for Asphaltenes Model Oils. Comparison with Crude Oil Behavior

Assessment of bioremediation of aliphatic, aromatic, resin, and asphaltene fractions of oil-sludge-contaminated soil

Current Knowledge and Potential Applications of Ionic Liquids in the Petroleum Industry

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