Dispersion Property of CO2 in Oil. 2: Volume Expansion of CO2 + Organic Liquid at Near-Critical and Supercritical Conditions of CO2

Yang, Zihao; Li, Mingyuan; Peng, Bo; Lin, Meiqin; Dong, Zhaoxia

doi:10.1021/je300090z

Cited by 19 publications

(18 citation statements)

References 36 publications

(38 reference statements)

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“…Vapor-liquid equilibrium (VLE) data were measured for CO 2 + ethanol system by Joung et al with temperature ranging from 313.15 to 343.15 K with pressure up to 6.92 MPa [11]. Our previous work reported the solubility and volume expansion coefficient for CO 2 + alkanes under the condition of near critical and supercritical of CO 2 [12,13]. Leu studied the equilibrium phase properties of CO 2 + pentane system [14].…”

Section: Introductionmentioning

confidence: 99%

Interfacial Tension of CO2 and Organic Liquid under High Pressure and Temperature

Yang

Peng

et al. 2014

Chinese Journal of Chemical Engineering

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Section: Introductionmentioning

confidence: 99%

Interfacial Tension of CO2 and Organic Liquid under High Pressure and Temperature

Yang

Peng

et al. 2014

Chinese Journal of Chemical Engineering

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“…This could be rationalized by the stronger London forces of linear alkane molecules with longer alkyl chains. 29 In contrast, cyclohexane molecule with the shape of a chair or boat and aromatic molecules with a ring show a larger surface area of contact than the linear alkane molecules. Meanwhile, the polarizability of cyclohexane and aromatics is stronger.…”

Section: Results and Discussionmentioning

confidence: 99%

Structure–Solubility Relationship of CO Dispersion in Model Hydrocarbon Liquids and Heavy Oil Fractions

et al. 2021

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The solubility of CO in heavy oils is an important parameter for designing and optimizing the partial upgrading process of heavy oil under CO/syngas and water. To study the structure–solubility relationship of CO dispersion in organic liquids, the solubility of CO in hydrocarbons ( n -hexane, n -octane, n -hexadecane, cyclohexane, toluene, and 1-methylnaphthalene), petroleum distillates, and residues from Canadian oil sand bitumen was measured at different temperatures and pressures. The dispersion behavior of CO in different molecules was simulated by the molecular dynamics calculation. The role of water on CO dispersion in these systems was also explored. Experimental data show that the increase of both paraffinic chain length and aromaticity of molecules could hinder the dissolution of CO. By theoretical calculation, it is found that n -hexadecane and 1-methylnaphthalene present the strongest self-aggregation tendency, resulting in the low interaction with CO. The intermolecular forces of hydrocarbons appear to be the key factor determining the CO solubility. The dissolved H 2 O molecules could weaken the intermolecular forces of hydrocarbons and thus increase the CO solubility. Based on the model system study, the solubility of CO in complex petroleum distillates and heavy residues is rationalized by their molecular composition, which is mainly dependent on the relative proportion of paraffins to aromatics.

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“…), leading to great differences of miscibility under different conditions. 16−21 Zhang et al 22 and Yang et al 23 studied the dispersion behaviors of CO 2 in oil, aiming at understanding the dissolution behavior of the gas in the oil phase. The external environment would greatly affect the gas−oil miscibility process.…”

Section: Introductionmentioning

confidence: 99%

Miscibility Process of Hydrocarbon Mixture Gas and Crude Oil: Insights from Molecular Dynamics

Zhu

Yan

et al. 2021

Ind. Eng. Chem. Res.

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Using molecular dynamics simulations, we investigate the miscibility process of hydrocarbon mixture gas and crude oil in Tarim Oilfield, which was not well understood from the microscopic points of view. The results show that the increase of the pressure of hydrocarbon mixture gas is favorable for the gas−oil miscibility until the interfaces vanish under a minimum miscible pressure (MMP). The identified MMP (37.3 MPa) is well consistent with the experimental value. With increasing gas pressure, the parallel diffusion coefficients of gas molecules in the gas− oil interfaces decrease, while the perpendicular ones increase. We also analyze the profiles of potential of mean force between different gas and various oil components, identifying the components which dominate the process of gas−oil miscibility from the perspective of molecular forces. In addition, the introduction of gravity in gas flooding slightly increases the MMP. These results can guide the optimization and design of the enhanced oil recovery technology with hydrocarbon mixture gas flooding.

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Dispersion Property of CO₂ in Oil. 2: Volume Expansion of CO₂ + Organic Liquid at Near-Critical and Supercritical Conditions of CO₂

Cited by 19 publications

References 36 publications

Interfacial Tension of CO2 and Organic Liquid under High Pressure and Temperature

Interfacial Tension of CO2 and Organic Liquid under High Pressure and Temperature

Structure–Solubility Relationship of CO Dispersion in Model Hydrocarbon Liquids and Heavy Oil Fractions

Miscibility Process of Hydrocarbon Mixture Gas and Crude Oil: Insights from Molecular Dynamics

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