V‐L‐S multiphase equilibrium in bitumen‐diluent systems

James, Neil E.; Mehrotra, Anil K.

doi:10.1002/cjce.5450660523

Cited by 27 publications

(16 citation statements)

References 20 publications

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“…The ranges shown on the data points are the standard deviations of each particle size distribution. It is interesting to note that other researchers (Kawanaka et al, 1991;James and Mehrotra, 1988; Leontaritis et al, 1988) have seen similar trends when plotting the amount of asphaltenes deposited against the paraffin carbon number. Plots similar to Figure 4 may be generated for other asphaltenic oils for the size of asphaltene particles formed due to different paraffinic diluents.…”

Section: Growth Of Asphaltene Particlesupporting

confidence: 65%

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Measurement of asphaltene agglomeration from cold lake bitumen diluted with n-alkanes

Ferworn¹,

Mehrotra²,

Svrcek³

1993

Can. J. Chem. Eng.

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A laser particle analyzer was used to study the formation of asphaltene agglomerates from Cold Lake bitumen due to the introduction of paraffinic diluents. The growth of the particles over time was investigated, and it was found that asphaltene particle growth is essentially an instantaneous process; that is, the final agglomerate size is reached within 5 seconds. The type of diluent used to precipitate the asphaltenes was determined to have a major effect on the size distribution of asphaltene agglomerates. The average particle size of asphaltene agglomerates ranged from 169 ptn for n‐hexadecane to 299m for n‐pentane. A relationship is shown to exist between the average particle size of asphaltene agglomerates and the carbon number of the diluent used.

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Section: Growth Of Asphaltene Particlesupporting

confidence: 65%

“…The distributions obtained after 5 seconds and 24 hours are very similar in shape with mean particle sizes of 287 pm and 279 pm, respectively. The increase in mean particle sizes is a result of the increased dilution ratio forcing more unattached micelles to the agglomerates (Ferworn, 1992;James and Mehrotra, 1988).…”

Section: Growth Of Asphaltene Particlementioning

confidence: 99%

Measurement of asphaltene agglomeration from cold lake bitumen diluted with n-alkanes

Ferworn¹,

Mehrotra²,

Svrcek³

1993

Can. J. Chem. Eng.

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“…Methodsbased on equations of state (EOS) -for calculating gas solubilities in bitumens were presented by James and Mehrotra (1988), Mehrotra et al (1989) and Mehrotra and Svrcek (1988). In these studies, bitumens were characterized as 3 to 4 pseudocomponents and the binary interaction parameters in equations of state were regressed to match the solubility data.…”

Section: C02-peace River Bitumen Vlementioning

confidence: 99%

Phase equilibria predictions for the CO₂‐H₂O‐NaCl‐bitumen system

1990

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Predictions of vapour-liquid, liquid-liquid and vapour-liquid-liquid phase equilibria are presented for the quaternary C0,-H2 0-NnCI-Pelice Rivw birumen system at reservoir conditions. Henry's law correlations are regressed from available data for the C0,-H, 0, C02-(H2 0 + NuCI) and CO2-bitumrn binary sub-systems. These correlations are incorporated into a model for predicting the phase behaviour of the quaternary system at temperatures of 8O-20O0C, NuCI concentrations of 0-10.5 mass% and pressures up to 10 MPa. It is shown that temperature, salt concentration and the global COz concentration significantly affect the distribution of COz in the liquid-liquid region. The proposed model is simple and computationally less demanding than those based on equations of state.On prCsente des pridictions d'6quilibre de phases liquidc-vapeur, liquide-liquide et liquide-liquide-vapeur pour le systkme quaternaire de bitume Peuce River-C02-H, 0-NaCI dans des conditions de reservoir. On a dktermine les correlations de la loi d'Henry par regression a partir de donnCes disponibles pour les sous-systkmes binaires COL-H2 0, COZ-(H, 0 t NcrCI) et C02-bitume. Ces correlations sont incorporh i un niodkle pour la prediction du comportement de phase du systhe quaternaire h des temperatures de 80 200°C, des concentrations en NnCI de 0 B 1 0 3 % en masse et des pressions allant jusqu'a 10 MPa. On montre que la temperature. la concentration de sel et la concentration globale de CO, influe de maniire significative sur la distribution du COz dans la region liquide-liquide. Le modele propose est simple et dernande moins de temps de calcul que les modeles basks sur les equations d'itat.Keywords: V-L-L equilibria. C'O,-HL 0-NcrCl-bitumen system, phase equilibria predictions.hermodynamic models for predicting the phase 49b THE

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“…Several methods, based on the use of an equation of state (EOS), for predicting the phase behaviour of gas-saturated bitumens have been presented in the literature (Fu et al, 1988;James and Mehrotra, 1988;Lu et al, 1986;Mehrotra and Svrcek, 1988a;Mehrotra et al, 1989a;Yu et al, 1989). Several methods, based on the use of an equation of state (EOS), for predicting the phase behaviour of gas-saturated bitumens have been presented in the literature (Fu et al, 1988;James and Mehrotra, 1988;Lu et al, 1986;Mehrotra and Svrcek, 1988a;Mehrotra et al, 1989a;Yu et al, 1989).…”

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confidence: 99%

“…However, the vapour-liquid, liquid-liquid or solid-liquid phase equilibria predictions using these *Author to whom correspondence should be addressed characterizations were only validated with data for the whole bitumen (Mehrotra and Svrcek, 1988a;Mehrotra et al, 1989a;James and Mehrotra, 1988). That is, the existing multicomponent bitumen characterizations are based on a division of bitumen into an arbitrary number of bitumen pseudocomponents.…”

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Phase behaviour of CO₂ ‐bitumen fractions

Eastick¹,

Svrcek²,

Mehrotra³

1992

Can J Chem Eng

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The phase behaviour of Cold Lake bitumen and its five fractions (or "cuts") saturated with carbon dioxide is examined. The two lightest fractions ($ < 510°C) were clear liquids, whereas the third and fourth fractions were dark and viscous, i.e. much like the whole bitumen. The fifth fraction was a glass-like solid, with a softening temperature of approximately 100°C. The vapour-liquid equilibrium (VLE) data for the bitumen and bitumen fractions saturated with CO, were collected at temperatures from 25 to 150°C and pressures up to 10 MPa. Experiments were also performed at conditions under which pure CO, exists as a liquid. The VLE and LLE data were correlated with the Peng-Robinson equation of state by modeling each bitumen fraction as one pseudocomponent whose critical properties and acentric factor were estimated from correlations available in the literature.The C0,-solubility and density data were used to develop generalized correlations for the critical pressure and the binary interaction parameter (k,j) in terms of molar mass and critical temperature. The model was subsequently used to predict the solubility of CO, in the whole bitumen which was represented as a 5-component mixture. A correlation for Cut ;-Cut j binary interaction parameter (k,.) was developed in terms of temperature and the difference in hydrocarbon molar masses. The average deviation in the predicted and experimental C0,-solubility in the whole Cold Lake bitumen was less than 7%.On examine ici le comportement de phase dii bitume de Cold Lake et de ses cinq fractions (ou ucoupuresb) saturees avec du dioxyde de carbone. Les deux fractions les plus legbres (bp < 510°C) sont des liquides clairs, tandis que les troisibme et quatribme fractions sont noires et visqueuses comme le bitume pur. La cinquikme fraction est solide comme du verre, avec une temperature de ramollissement approximative de 100°C. Les donnkes d'equilibre liquidevapeur (ELV) pour le bitume et les fractions de bitume saturees avec du CO, ont CtC recueillies a des temperatures comprises entre 25 et 150°C et des pressions allant jusqu'h 10 MPa. Les experiences ont Cgalement CtC menees en presence de CO, pur sous forme liquide. On a corrClC les donnCes d'equilibre ELV et ELL avec 1'Cquation d'Ctat de Peng-Robinson en modelisant chaque fraction de bitume comme un pseudo-composant dont les propriCtCs critiques et le facteur acentrique furent estimks h partir des corrClations parus dans les travaux publiks.On a utilisC les donnees de la solubilitk du CO, et de la masse volumique pour Ctablir des corrClations generalisdes pour la pression critique et le paramktre d'interaction binaire ( k i j ) en fonction de la masse molaire et de la tempCrature critique. On a utilisC par la suite le modttle pour prkdire la solubilite du CO, dans le bitume pur qui est reprCsente comnie un melange a 5 composants. Une correlation a ttC ttablie pour le parambtre d'interaction binaire fraction ifraction j par rapport k la temphture et a la difference dans les masses molaires des hydrocarbures. L'Ccart m...

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V‐L‐S multiphase equilibrium in bitumen‐diluent systems

Cited by 27 publications

References 20 publications

Measurement of asphaltene agglomeration from cold lake bitumen diluted with n-alkanes

Measurement of asphaltene agglomeration from cold lake bitumen diluted with n-alkanes

Phase equilibria predictions for the CO₂‐H₂O‐NaCl‐bitumen system

Phase behaviour of CO₂ ‐bitumen fractions

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V‐L‐S multiphase equilibrium in bitumen‐diluent systems

Cited by 27 publications

References 20 publications

Measurement of asphaltene agglomeration from cold lake bitumen diluted with n-alkanes

Measurement of asphaltene agglomeration from cold lake bitumen diluted with n-alkanes

Phase equilibria predictions for the CO2‐H2O‐NaCl‐bitumen system

Phase behaviour of CO2 ‐bitumen fractions

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Phase equilibria predictions for the CO₂‐H₂O‐NaCl‐bitumen system

Phase behaviour of CO₂ ‐bitumen fractions