Molar mass distribution and solubility modeling of asphaltenes

Yarranton, Harvey W.; Masliyah, J.H.

doi:10.1002/aic.690421222

Cited by 197 publications

(184 citation statements)

References 19 publications

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“…These results are in stark contrast with a school of thought prevalent since the 1940s that resins can both peptize and stabilize asphaltenes. On the other hand, these results are in accordance with the recent work of Yarrantov and Masliyah, 34 who described both asphaltenes and resins as families of compounds that share similar characteristics, and are keen to self-associate, so they should not be considered different fractions.…”

Section: Discussionsupporting

confidence: 91%

A study of asphaltene-resin interactions

Marques¹,

Pereira²,

Bueno³

et al. 2012

J. Braz. Chem. Soc.

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Foi realizado um estudo para investigar a interação entre asfaltenos (em soluções de tolueno) e resinas (em soluções de n-heptano). Para entender melhor o tipo de interação entre essas frações, quantificou-se o consumo de resina quando asfaltenos (dissolvidos em tolueno) foram precipitados com uma solução de n-heptano contendo resina. Os resultados indicaram que a precipitação de asfaltenos ocorre juntamente com a redução na concentração de resina. Os perfis das isotermas de ligação indicaram que a saturação ocorreu em um caso, em quanto que o efeito cooperativo com posterior platô inicial foi observado para duas outras amostras. Estes resultados confirmaram a hipótese de que resinas podem adsorver em asfaltenos, mas não podem evitar floculação e precipitação de asfaltenos. Além disso, resultados de microcalorimetria sugeriram que a resina e asfalteno interagem por forças fracas de van der Waals. Estes resultados estão em contraste com a escola de pensamento predominante desde a década de 1940 que advoga que as resinas podem peptizar e estabilizar asfaltenos.A study was carried out to investigate the interaction between asphaltenes (in toluene solutions) and resins (in n-heptane solutions). To better understand the type of interaction between these fractions, it was quantified the resin uptake when asphaltenes (dissolved in toluene) were precipitated by a resin-containing n-heptane solution. These results indicated the asphaltene precipitation occurs together with a reduction in the resin concentration. The binding isotherm profiles indicated that saturation occurred in one case, while collective association following an initial plateau was observed for the other two samples. These results confirmed the hypothesis that resins can adsorb on asphaltenes but cannot prevent asphaltenes from flocculating and precipitating. Furthermore, microcalorimetric results suggested that the resin and asphaltene interact by weak van der Waals forces. These results are in stark contrast with the school of thought prevalent since the 1940s that resins can peptize and stabilize asphaltenes.

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Section: Discussionsupporting

confidence: 91%

A study of asphaltene-resin interactions

Marques¹,

Pereira²,

Bueno³

et al. 2012

J. Braz. Chem. Soc.

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show abstract

“…[6] Fractionation is one of the ways to improve the characterization and understanding the properties of asphaltenes. Several methods exist, for instance some researchers [7][8][9][10][11][12][13][14] initially precipitated asphaltenes by diluting with an n-alkane and then used a binary mixture of solvents (polar solvent + anti-solvent) to fractionate the precipitated asphaltenes. Other fractionation procedures less commonly used include fractionation by varying the crude oil/n-alkane ratios [15][16][17][18], ultracentrifugation [19,20], ultrafiltration [14], supercritical extraction [21] and gel permeation chromatography [22,23].…”

Section: Introductionmentioning

confidence: 99%

Asphaltene fractionation based on adsorption onto calcium carbonate: Part 1. Characterization of sub-fractions and QCM-D measurements

Subramanian

Simon

Gao

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…They are typically defined as the solubility class of crude oil insoluble in nalkanes (n-pentane, n-hexane) but soluble in aromatic compounds (xylene, toluene) 21,22,23 .…”

Section: Introductionmentioning

confidence: 99%