Effect of origin and technology on the chemical composition and colloidal stability of bitumens

Baginska, K.; Gaweł, Irena

doi:10.1016/j.fuproc.2003.10.002

Cited by 46 publications

(25 citation statements)

References 13 publications

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“…= 49). It has already been established that the colloidal stability of an asphalt decreases with increase in asphaltene content [43]. The increasing values of these two indices reflect the instability of the oxidized asphalts.…”

Section: The Colloidal Instability Of the Asphaltsmentioning

confidence: 95%

“…The size of the colloidal particles has been determined using different techniques: ultrafiltration, electron microscopy, small angle X-ray scattering and others [42,43]. The size of the asphaltenes particles ranges from 4 to 10 nm and that of asphaltenes micelles varies 15 to 30 nm.…”

Section: Colloidal Stability Of Asphaltsmentioning

confidence: 99%

“…The solubilizing power of the resins is affected by the degree of aromaticity in the molecules. The stability of asphalt may be described by the Gaestel instability index, which shows the dispersing capability of maltenes to asphaltenes [34,43,44]. This is also evaluated using n-heptane asphaltenes.…”

Section: Colloidal Stability Of Asphaltsmentioning

confidence: 99%

“…When assessing the colloidal stability of asphalts, the most important factor taken into account is the content of the asphaltenes. Recent studies have looked closely into the chemical composition and structure of asphaltenes [21,24,39,[40][41][42][43][44]. Thus, the two asphalt indices; I A and I C , which bear direct relationship to the content of asphaltenes can be conveniently used to estimate the extent of colloidal stability.…”

Section: The Colloidal Instability Of the Asphaltsmentioning

confidence: 99%

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Certain Relationships between Chemical Composition and Properties of Petroleum Asphalts from Different Origin

Oyekunle¹

2006

Oil & Gas Science and Technology - Rev. IFP

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Résumé -Des relations entre la composition chimique et les propriétés de bitumes d'origines différentes -Les bitumes sont habituellement classés selon trois propriétés physiques : ductilité, pénétration et point de ramollissement. L'étude présentée ici démontre à travers plusieurs exemples que ces traits physiques ne sont pas assez distinctifs. Il a été découvert que la composition chimique apporte davantage d'enseignements sur les différentes propriétés physiques des bitumes. On note des différences remarquables entre la composition chimique de bitumes de même point de ramollissement et de même origine. Une plus grande ductilité provient d'une plus forte teneur en résines alors qu'une pénétration moindre est la conséquence d'une plus grande teneur en asphaltènes. La corrélation de deux indices et de la composition de bitumes révèle que l'indice Gaestël (1 c ) est un meilleur paramètre de caractérisation de bitumes que l'indice d'asphaltène (1 A ). Ces deux indices peuvent être utilisés comparativement pour distinguer des bitumes ayant des points de ramollissement voisins. Abstract -Certain Relationships between Chemical Composition and Properties of Petroleum

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Section: The Colloidal Instability Of the Asphaltsmentioning

confidence: 95%

Section: Colloidal Stability Of Asphaltsmentioning

confidence: 99%

Section: Colloidal Stability Of Asphaltsmentioning

confidence: 99%

Section: The Colloidal Instability Of the Asphaltsmentioning

confidence: 99%

See 2 more Smart Citations

Certain Relationships between Chemical Composition and Properties of Petroleum Asphalts from Different Origin

Oyekunle¹

2006

Oil & Gas Science and Technology - Rev. IFP

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“…Because of the scalar interactions, the aggregation of asphaltene micelles occur. The chemical type of the feedstock and the technology of bitumen production have an influence on the size of the asphaltene micelles and on the extent of aggregation [11]. Gülsün and Yalçıner [12] studied the asphaltenes of MC-0 and MC-4 liquid asphalts (MC-30 and MC-800 in new classification, respectively) and reported that the solvent molecules can either attach to the asphaltene collodial particle for a very short time or diffuse freely in and out of the colloid.…”

Section: Resultsmentioning

confidence: 99%

Intermolecular Magnetic Spin-Spin Interaction in Asphaltene Suspensions at 1.53 mT

2016

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In this study, Overhauser effect (OE) type of dynamic nuclear polarization (DNP) experiments were performed to study suspensions of MC800 asphaltene in bromopentafluorobenzene, chloropentafluorobenzene and hexafluorobenzene aromatic solvents. The experiments were performed at a low field of 1.53 mT in a double-resonance nuclear magnetic resonance (NMR) spectrometer. In this technique the nuclei of diffusing solvent molecules and the unpaired electron existing on the asphaltene micelles interact magnetically. The DNP parameters were determined. Additionally, the interactions between 19 F nuclei of the solvent and the electrons delocalized on the asphaltene are interpreted. The highest enhancement factor value (5.90) was obtained for the hexafluorobenzene solvent medium, because between these, hexafluorobenzene has the highest fluorine atom number. The solvent molecules attach to the colloidal asphaltene particles for a very short time forming complexes and making scalar interaction. Morphologies of asphaltene surfaces depending on the solvent effects were observed by using scanning electron microscopy (SEM).

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Effect of Polymer Dispersion on the Rheology and Morphology of Polymer Modified Bituminous Blend

Kamaruddin

Habib

Tan

et al. 2012

7th RILEM International Conference on Cracking in Pavements

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Effect of origin and technology on the chemical composition and colloidal stability of bitumens

Cited by 46 publications

References 13 publications

Certain Relationships between Chemical Composition and Properties of Petroleum Asphalts from Different Origin

Certain Relationships between Chemical Composition and Properties of Petroleum Asphalts from Different Origin

Intermolecular Magnetic Spin-Spin Interaction in Asphaltene Suspensions at 1.53 mT

Effect of Polymer Dispersion on the Rheology and Morphology of Polymer Modified Bituminous Blend

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