Phase composition and saturated liquid properties in binary and ternary systems containing carbon dioxide, n-decane, and n-tetradecane

Kariznovi, Mohammad; Nourozieh, Hossein; Abedi, Jalal

doi:10.1016/j.jct.2012.08.019

Cited by 48 publications

(57 citation statements)

References 49 publications

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“…The tPC-PSAFT equation of state has been described in detail elsewhere, 23,24 and only a brief introduction of tPC-PSAFT is mentioned here. tPC-PSAFT is usually expressed as a sum of the reduced residual Helmholtz free energy ãr es : =̃+̃+̃+̃+ã a a a a a res hc disp assoc polar ind (8) where ãh c , ãd isp , ãa ssoc , ãp olar , and ãi nd in the right-hand side of eq 8 are the reduced Helmholtz free energy of the hard-chain term, dispersion term, association interaction, polar interaction, and induced polar interactions, respectively. For nonassociation fluids, such as CO 2 and tetradecane, the reduced residual Helmholtz free energy ãr es reduces tõ =̃+̃+̃+ã a a a a res hc disp polar ind (9) For the mixture, the reduced Helmholtz free energies of the hard-chain and dispersion terms were given in PC-SAFT theory, 19 …”

Section: Density Prediction Equation Ofmentioning

confidence: 99%

(p, ρ, T) Behavior of CO₂ + Tetradecane Systems: Experiments and Thermodynamic Modeling

et al. 2015

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The injection of CO 2 into oil reservoirs (CO 2 enhanced oil recovery, CO 2 -EOR) can result in higher production, and the use of CO 2 as a mining resource can thus be an economic driver for oil production. The thermodynamic properties of CO 2 mixtures are essential for the design and operation of CO 2 -EOR systems. This paper addresses the (p, ρ, T) properties of a CO 2 + tetradecane solution. Experimental densities were measured on a magnetic suspension balance, and experiments were performed at pressures from 10 MPa to 19 MPa, temperatures from 313.15 K to 353.15 K, and CO 2 mole fractions of x 1 = 0, 0.2469, 0.5241, 0.7534, and 0.8773. Solution densities increased with pressure and decreased with temperature over the experimental range. Density versus the CO 2 mole fraction increased at first and then decreased at higher temperatures and higher CO 2 concentrations. The compositions intersect when plotted, and the pressure intersection increased with temperature. The excess molar volumes of the binary mixtures were negative over the entire range of composition, which increased with increasing pressure and became more negative with increasing temperature. The PC-SAFT and tPC-PSAFT equations of state were used to calculate the densities of the binary mixtures. New PC-SAFT parameters for tetradecane were obtained by fitting to experimental densities directly. In both PC-SAFT and tPC-PSAFT, the binary interaction parameter k ij was fitted as a function of the CO 2 mole fraction. The tPC-PSAFT combined with the correlation of k ij gave the best predictions of the CO 2 + tetradecane mixture densities.

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Section: Density Prediction Equation Ofmentioning

confidence: 99%

(p, ρ, T) Behavior of CO₂ + Tetradecane Systems: Experiments and Thermodynamic Modeling

et al. 2015

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“…Despite the importance of asymmetric mixtures, few data are available for the viscosity and density of representative mixtures. The situation is illustrated in Table where we list the available literature data for the viscosity of mixtures of alkanes with either methane − or carbon dioxide. ,,− The system methane + decane is something of an exception with experimental results reported by Lee and Eakin, Knapstad et al, Dauge et al, Canet et al, Audonnet and Padua, Gozalpour et al, Peleties, and Daridon et al Few data are found for asymmetric mixtures of either methane or carbon dioxide with other hydrocarbons. The open literature also includes little experimental data for the viscosity of mixtures of carbon dioxide with crude oils; Table lists the data sources identified by the authors. − …”

Section: Introductionmentioning

confidence: 99%

Viscosities and Densities of Binary Mixtures of Hexadecane with Dissolved Methane or Carbon Dioxide at Temperatures from (298 to 473) K and at Pressures up to 120 MPa

2016

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We report measurements of the viscosity and density of two binary mixtures comprising hexadecane with dissolved carbon dioxide or methane over the temperature range from (298.15 to 473.15) K and at pressures up to 120 MPa. The measurements were conducted at various mole fractions x of the light component as follows: x = (0, 0.0690, 0.5877 and 0.7270) for xCO2 + (1 -x)C16H34 and x = (0, 0.1013, 0.2021, 0.2976 and 0.3979) for xCH4 + (1 -x)C16H34. The viscosity and density measurements were carried out simultaneously using a bespoke vibrating-wire apparatus with a suspended sinker. With respect to the first mixture, the apparatus was operated in a relative mode and was calibrated in octane whereas, for the second mixture, the apparatus was operated in an absolute mode. To facilitate this mode of operation, the diameter of the centreless-ground tungsten wire was measured with a laser micrometer, and the mass and volume of the sinker were measured independently by hydrostatic weighing. In either mode of operation, the expanded relative uncertainties at 95 % confidence were 2 % for viscosity and 0.3 % for density. The results were correlated using simple relations that express both density and viscosity as functions of temperature and pressure. For both pure hexadecane and each individual mixture, the results have been correlated using the modified Tait equation for density, and the Tait-Andrade equation for viscosity; both correlations described our data almost to within their estimated uncertainties.In an attempt to model the viscosity of the binary mixtures as a function of temperature, density and composition, we have applied the extended-hard-sphere model using several mixing rules for the characteristic molar core volume. The most favourable mixing rule was found to be one based on a mole-fraction-weighted sum of the pure component molar core volumes raised to a power γ which was treated as an adjustable parameter. In this case, deviations of the experimental viscosities from the model were within ±25 %.

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“…Molar volume and related volume expansion were not directly measured in these studies. However, ample density data (molar volume data) are available for each of the systems in the literature at either the exact temperatures and pressure range or temperatures that bracket those used in these studies. − Interpolation is used to determine the molar volume at each temperature, pressure, and composition. Figure illustrates the change in molar volume of n -hexane with the increase in CO 2 pressure and composition.…”

Section: Resultsmentioning

confidence: 99%

Heat Transport Properties of CO₂-Expanded Liquids: n-Hexane, n-Decane, and n-Tetradecane

Kian

Scurto

2017

Ind. Eng. Chem. Res.

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A number of processes involve liquids saturated with significant quantities of gases at elevated pressures, e.g., processes in gas- or CO2-expanded liquids (GXLs, CXLs), particle formation from gas or supercritical antisolvent methods (GAS, SAS, etc.), CO2 capture and sequestration, and enhanced oil recovery (EOR). In order to engineer these systems, the thermodynamic and transport properties are required. This contribution is one of the first reports for the heat transport properties of gas-expanded liquids at elevated pressures. The thermal conductivity, thermal diffusivity, and heat capacity are presented for binary systems of CO2 and the n-alkanes, n-hexane, n-decane, or n-tetradecane, at 25, 40, and 55 °C and pressures up to 106 bar. Equation of state modeling of literature vapor–liquid equilibrium data was used to determine the compositions at the conditions of the experimental heat transport measurements. All measured properties decrease with increasing composition of CO2 (pressure) in a relatively linear manner until a CO2 composition of approximately 70 mol %. The Prandtl number, Pr, is calculated and decreases with increased CO2 composition for all systems. However, as the fluid viscosity decreases with increased CO2, the heat transfer coefficient, h, in pipe flow would actually increase in a turbulent flow regime.

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Phase composition and saturated liquid properties in binary and ternary systems containing carbon dioxide, n-decane, and n-tetradecane

Cited by 48 publications

References 49 publications

(p, ρ, T) Behavior of CO₂ + Tetradecane Systems: Experiments and Thermodynamic Modeling

(p, ρ, T) Behavior of CO₂ + Tetradecane Systems: Experiments and Thermodynamic Modeling

Viscosities and Densities of Binary Mixtures of Hexadecane with Dissolved Methane or Carbon Dioxide at Temperatures from (298 to 473) K and at Pressures up to 120 MPa

Heat Transport Properties of CO₂-Expanded Liquids: n-Hexane, n-Decane, and n-Tetradecane

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Phase composition and saturated liquid properties in binary and ternary systems containing carbon dioxide, n-decane, and n-tetradecane

Cited by 48 publications

References 49 publications

(p, ρ, T) Behavior of CO2 + Tetradecane Systems: Experiments and Thermodynamic Modeling

(p, ρ, T) Behavior of CO2 + Tetradecane Systems: Experiments and Thermodynamic Modeling

Viscosities and Densities of Binary Mixtures of Hexadecane with Dissolved Methane or Carbon Dioxide at Temperatures from (298 to 473) K and at Pressures up to 120 MPa

Heat Transport Properties of CO2-Expanded Liquids: n-Hexane, n-Decane, and n-Tetradecane

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Product

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(p, ρ, T) Behavior of CO₂ + Tetradecane Systems: Experiments and Thermodynamic Modeling

(p, ρ, T) Behavior of CO₂ + Tetradecane Systems: Experiments and Thermodynamic Modeling

Heat Transport Properties of CO₂-Expanded Liquids: n-Hexane, n-Decane, and n-Tetradecane