Assessment of the liquid mixture density effect on the prediction of supercritical carbon dioxide volume expansion of organic solvents by Peng-Robinson equation of state

Cardoso, Samuel; Costa, Glória Meyberg Nunes; Melo, S.A.B. Vieira de

doi:10.1016/j.fluid.2016.06.006

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…Their study reported the density of this mixture at temperatures from (293 to 318) K and pressure up to 100 MPa. Furthermore, the availability of density data for ternary or multicomponent mixtures comprising alkanes with dissolved CO 2 is even more restrictive. − …”

Section: Introductionmentioning

confidence: 99%

Density of n-Heptane + n-Dodecane and Carbon Dioxide + n-Heptane + n-Dodecane Mixtures up to 70 MPa from (293.15 to 363.15) K

et al. 2021

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Density measurements of the n-heptane + n-dodecane binary mixture were performed with a vibrating tube densitometer in the temperature range of (293.15 to 363.15) K and pressure up to 70 MPa at six different n-heptane mole fractions: x 1 = 0, 0.1999, 0.3991, 0.5999, 0.7998, and 1. Densities of the CO2 + n-heptane + n-dodecane ternary mixtures were also measured at the same temperature and pressure ranges for two different isopleths: CO2 (0.4904) + n-heptane (0.2548) + n-dodecane (0.2548), and CO2 (0.7425) + n-heptane (0.1288) + n-dodecane (0.1288). The obtained experimental data were correlated by a polynomial model and by a Tait-based equation. Density values for pure n-heptane and n-dodecane were found to be in agreement with literature data within approximately 0.3%. The isothermal compressibility and thermal expansion values of these mixtures were obtained by differentiation from the models as a function of pressure and temperature. Analysis of these properties pointed out that the polynomial model provided more accurate results related to derived properties. The excess volume of the mixtures was also determined. In general, they are negative, but they become positive for binary mixtures in the heptane-rich region as well as at higher pressures for ternary mixtures.

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Section: Introductionmentioning

confidence: 99%

Density of n-Heptane + n-Dodecane and Carbon Dioxide + n-Heptane + n-Dodecane Mixtures up to 70 MPa from (293.15 to 363.15) K

et al. 2021

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“… 30 To reduce this error, Martin 31 first introduced the concept of volume translation, and Peneloux et al suggested a constant volume correction in SRK EOS. 32 This method can still be used to evaluate the liquid density in supercritical CO 2 33 and other systems. 34 , 35 Further research shows that the temperature-dependent volume translation model 36 , 37 and temperature–volume-dependent volume translation model 38 , 39 can improve the prediction accuracy.…”

Section: Introductionmentioning

confidence: 99%

“…To reduce this error, Martin first introduced the concept of volume translation, and Peneloux et al suggested a constant volume correction in SRK EOS . This method can still be used to evaluate the liquid density in supercritical CO 2 and other systems. , Further research shows that the temperature-dependent volume translation model , and temperature–volume-dependent volume translation model , can improve the prediction accuracy. Recently, Chen and Li have fully exploited the potential of the distance function to improve the accuracy of the volume translation SRK EOS in predicting the density of saturated and single-phase liquids …”

Section: Introductionmentioning

confidence: 99%

Phase Equilibrium and Density of CO₂ + Acetic Acid Systems from 308.15 to 338.15 K and 15 to 45 MPa

Zhu

Gong

et al. 2021

ACS Omega

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Using a high-pressure phase equilibrium apparatus and vibrating-tube densimeter, phase transition pressures of CO 2 (1) + acetic acid (2) binary systems with x 2 = 0.000, 0.107, 0.163, 0.222, and 1.000 were measured under temperatures from 308.15 to 338.15 K. Besides, the densities at the same composition and temperature under pressure from 15 to 45 MPa were also detected, and the volumes of mixing (Δ V m ) were calculated. Three prediction models (SRK EOS, PC-SAFT EOS, and TS model) were introduced to predict and correlate the density of binary systems, which was found to have positive relationships with temperature and acetic acid concentration and a negative relationship with pressure. Thereinto, the variation trend of CO 2 density with pressure tends to be flat under high pressure, and which of acetic acid density increased linearly with pressure. Δ V m are negative, and their absolute value increases with the increase of temperature and the decrease of pressure. The work herein could provide a theoretical guide and basic data for supercritical CO 2 extraction technology and CO 2 application in oil field development.

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An improved volume-translated SRK EOS dedicated to more accurate determination of saturated and single-phase liquid densities

Chen

2020

Fluid Phase Equilibria

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Assessment of the liquid mixture density effect on the prediction of supercritical carbon dioxide volume expansion of organic solvents by Peng-Robinson equation of state

Cited by 9 publications

References 24 publications

Density of n-Heptane + n-Dodecane and Carbon Dioxide + n-Heptane + n-Dodecane Mixtures up to 70 MPa from (293.15 to 363.15) K

Density of n-Heptane + n-Dodecane and Carbon Dioxide + n-Heptane + n-Dodecane Mixtures up to 70 MPa from (293.15 to 363.15) K

Phase Equilibrium and Density of CO₂ + Acetic Acid Systems from 308.15 to 338.15 K and 15 to 45 MPa

An improved volume-translated SRK EOS dedicated to more accurate determination of saturated and single-phase liquid densities

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Assessment of the liquid mixture density effect on the prediction of supercritical carbon dioxide volume expansion of organic solvents by Peng-Robinson equation of state

Cited by 9 publications

References 24 publications

Density of n-Heptane + n-Dodecane and Carbon Dioxide + n-Heptane + n-Dodecane Mixtures up to 70 MPa from (293.15 to 363.15) K

Density of n-Heptane + n-Dodecane and Carbon Dioxide + n-Heptane + n-Dodecane Mixtures up to 70 MPa from (293.15 to 363.15) K

Phase Equilibrium and Density of CO2 + Acetic Acid Systems from 308.15 to 338.15 K and 15 to 45 MPa

An improved volume-translated SRK EOS dedicated to more accurate determination of saturated and single-phase liquid densities

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Product

Resources

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Phase Equilibrium and Density of CO₂ + Acetic Acid Systems from 308.15 to 338.15 K and 15 to 45 MPa