Extraction and Characterization of Asphaltenes from Different Crude Oils and Solvents

Ancheyta, Jorge; Centeno, Guillermo; Trejo, Fernando; Marroquín, Gustavo; García, José Ricardo Palomares; Tenório, Eduardo Antônio Guimarães; Torres, A.

doi:10.1021/ef010300h

Cited by 161 publications

(114 citation statements)

References 33 publications

(68 reference statements)

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“…Table 2, extracted from the work carried out by Speight and Moschopedis (1981), indicates that the elemental carbon and hydrogen composition of asphaltenes in oils from various geographic origins remains constant (% carbon = 82% ± 3%, % hydrogen = 8.1% ± 0.7%). Elemental and percentage analysis of asphaltene metals precipitated using various solvents (taken from Ancheyta et al, 2002) Maya Isthmus Olmeca…”

Section: Elemental Compositionmentioning

confidence: 99%

“…13 C NMR can be used to characterise the CH 3 , CH 2 and CH molecular groups belonging to aliphatic chains and the CH, CH subsituted , C condensed molecular groups belonging to aromatic rings. With these groups it is possible to produce an image of the structure of asphaltenes (Ancheyta et al, 2002) and estimate the thermodynamic quantities of fractions (Szewczyk, 1997) using correlations based on the group contribution concept.…”

Section: Molecular Groupsmentioning

confidence: 99%

“…In conclusion, asphaltenes are characterised by constant hydrogen and carbon percentages and an H/C ratio lower than that of the oil containing them (Ancheyta et al, 2002;Tuttle, 1983). Leon et al (1999) demonstrated that asphaltenes extracted from unstable crudes exhibit a hydrogen deficit compared with asphaltenes extracted from stable crudes.…”

mentioning

confidence: 94%

“…It is therefore a solubility class; consequently, there are no asphaltene molecules as such, but molecules forming the asphaltenes. Ancheyta et al (2002) demonstrated that the quantity of asphaltenes precipitated varies with the volume of solvent added, becoming constant after reaching a solvent / oil ratio of 40 ml/g. The quantity of asphaltenes precipitated also varies with the chain length of the n-alkane used.…”

Section: Introductionmentioning

confidence: 99%

“…Table 4 lists data acquired by Ancheyta et al (2002) on three oils. Their results agree with those of the previous authors.…”

mentioning

confidence: 99%

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Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Pina¹,

Mougin²,

Béhar³

2006

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Caractérisation des asphaltènes et modélisation de la floculation -État de l'Art -Ce travail présente un état de l'art concernant la floculation des asphaltènes avec deux grands items : la caractérisation des asphaltènes dans différents milieux et la modélisation de la floculation. Cette revue commence par une caractérisation des asphaltènes proprement dite puis des caractérisations de ces derniers dans des solvants synthétiques ou des bruts. Nous insistons sur les techniques de détermination de masses molaires et de diffraction. L'incidence d'un ajout de bon/mauvais solvant est également discutée. La seconde partie de cette revue concerne la modélisation de la floculation. Elle examine les différents modèles de la littérature avant de présenter celui de Szewczyk et Béhar (1999) et son intégration dans un simulateur de réservoir. Les modèles disponibles requièrent encore des données expérimentales délicates à acquérir et un effort de recherche doit être réalisé pour améliorer cet état de fait. Abstract -Characterisation of Asphaltenes and Modelling of Flocculation -State of the Art -This document describes a state of the art concerning the flocculation of asphaltenes with two major sections: characterisation of asphaltenes in various environments and modelling of flocculation. This review starts with the characterisation of asphaltenes as such, then their characterisation in synthetic solvents or crudes. Emphasis is placed on molar mass determination and diffraction techniques. The impact of adding a good/poor solvent is also discussed. The second part of this review is dedicated to modelling.We first examine the various models in the literature before describing the Szewczyk and Béhar (1999) model and its integration in a reservoir simulator. The models available still require experimental data which is difficult to collect and further research is needed to improve this situation.Petroleum Industry Applications of Thermodynamics Applications de la thermodynamique dans l'industrie pétrolière

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Section: Elemental Compositionmentioning

confidence: 99%

Section: Molecular Groupsmentioning

confidence: 99%

mentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

“…Table 4 lists data acquired by Ancheyta et al (2002) on three oils. Their results agree with those of the previous authors.…”

mentioning

confidence: 99%

See 3 more Smart Citations

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Pina¹,

Mougin²,

Béhar³

2006

Oil & Gas Science and Technology - Rev. IFP

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NMR Spectroscopic Analysis in Characterization of Crude Oil and Related Products

Iravani

2017

Analytical Characterization Methods for Crude Oiland Related Products

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On the determination of molecular weight distributions of asphaltenes and their aggregates in laser desorption ionization experiments

et al. 2006

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Molecular weight distributions (MWD) of asphaltenes and their aggregates have been investigated in laser desorption ionization (LDI) mass spectrometric experiments. A systematic investigation of the dependence of the measured MWD on the asphaltene sample density and on the laser pulse energy allows the assignment of most probable molecular weights within 300-500 amu and average molecular weights of 800-1000 amu for the monomeric asphaltenes, as well as for the estimation of the contribution from asphaltene clusters in typical LDI measurements. The results serve to reconcile the existing controversy between earlier mass spectrometric characterizations of asphaltenes based on laser desorption techniques by different groups. Furthermore, the MWD measurements performed on particularly dense samples yield an additional differentiated broad band peaking around 9000-10,000 amu and extending over 20,000 amu, not observed previously in LDI experiments, thereby revealing a strong propensity of the asphaltenes to form clusters with specific aggregation numbers, which is in qualitative agreement with previous theoretical predictions and with the interpretation of measurements performed with other techniques.

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Extraction and Characterization of Asphaltenes from Different Crude Oils and Solvents

Cited by 161 publications

References 33 publications

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

Characterisation of Asphaltenes and Modelling of Flocculation – State of the Art

NMR Spectroscopic Analysis in Characterization of Crude Oil and Related Products

On the determination of molecular weight distributions of asphaltenes and their aggregates in laser desorption ionization experiments

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