A modified perturbed hard-sphere-chain equation of state for liquid refrigerant mixtures

Sharafi, Zahra; Eslami, Hossein

doi:10.1080/00319104.2012.747202

Cited by 6 publications

(4 citation statements)

References 16 publications

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“…7 Camacho−Camacho studied the vapor−liquid equilibrium for the CO 2 + undecane systems at four temperatures (315, 344, 373, and 418 K) and pressures up to 20 MPa; 8 however, the density of this system has not been measured. Sharafi et al employed the PHSC EOS to calculate the densities of R32-R134a mixtures and the absolute average deviation (AAD) was 1.08%; 9 Hosseini et al applied the PHSC EOS to model the density of ionic liquids and obtained an AAD of 0.24%. 10 Further more, Valavi et al used the PHSC EOS to predict the density of an acid and peptide solution with an AAD of 0.38%.…”

Section: Introductionmentioning

confidence: 99%

“…Sharafi et al. employed the PHSC EOS to calculate the densities of R32-R134a mixtures and the absolute average deviation (AAD) was 1.08%; Hosseini et al applied the PHSC EOS to model the density of ionic liquids and obtained an AAD of 0.24% . Further more, Valavi et al used the PHSC EOS to predict the density of an acid and peptide solution with an AAD of 0.38% .…”

Section: Introductionmentioning

confidence: 99%

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Density and Volumetric Behavior of CO₂ + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

et al. 2016

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Densities of compressed CO2 + undecane binary mixtures were measured using a magnetic suspension balance (MSB). Measurements were made at temperatures ranging from 313.15 to 353.15 K and pressures ranging from 8 to 19 MPa at CO2 mole fractions (x 1) of 0, 0.2483, 0.4641, 0.6797, and 0.8874. The mixture densities were found to increase linearly with pressure and decrease with temperature; this behavior is similar to that of CO2 + decane or dodecane mixtures. The mixture densities show a crossover with composition when the CO2 mole fraction is high. The densities of alkanes increase almost linearly with carbon number, as do the densities of CO2 + alkane mixtures. With the of CO2 mole fraction, the mixture densities increase at first, then decrease. The increase of pressure makes the excess molar volume less negative, whereas the increase of temperature makes it more negative. Densities calculated from the perturbed hard chain equation of state (PHSC EOS) with improved parameters are in good agreement with the experimental densities. Adopting the constant binary interaction parameter k ij for different alkanes in the PHSC EOS slightly enlarge the model deviation but simplifies the calculation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Density and Volumetric Behavior of CO₂ + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

et al. 2016

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“…10 Sharafi et al used PHSC to predict the densities of the R32−R134a mixture and obtained an AAD of 1.08%. 11 The precision of PHSC models for the CO 2 −alkane systems is not sufficiently high.…”

Section: Introductionmentioning

confidence: 99%

“…Valavi et al predicted the densities of CO 2 –ethane and CO 2 –methane mixtures by PHSC and obtained AADs of 4.46% and 4.34%, respectively . Sharafi et al used PHSC to predict the densities of the R32–R134a mixture and obtained an AAD of 1.08% . The precision of PHSC models for the CO 2 –alkane systems is not sufficiently high.…”

Section: Introductionmentioning

confidence: 99%

Measurement and Modeling of the Densities for CO₂ + Dodecane System from 313.55 K to 353.55 K and Pressures up to 18 MPa

Zhang

Liu

et al. 2014

J. Chem. Eng. Data

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Densities of binary mixtures of CO 2 and dodecane were measured by a magnetic suspension balance (MSB) at temperatures ranging from 313.55 K to 353.55 K under pressures from (8 to 18) MPa at five different CO 2 mole fractions: x 1 = 0, 0.2497, 0.5094, 0.7576, and 0.8610. Densities of the binary mixture increase with increasing pressure and decrease with increasing temperature. A crossover phenomenon is observed at high CO 2 concentrations, and the crossover pressure increases with increasing temperature. The experimental densities increase with the CO 2 mole fraction at first and then decrease at high CO 2 concentrations. The excess molar volumes are negative over the whole range of CO 2 concentrations and are more negative with increasing temperature and less negative with increasing pressure. The Benedict−Webb−Rubin−Starling (BWRS) and the improved Perturbed Hard-Sphere Chain (PHSC) equations of state were used to calculate the densities of the CO 2 −dodecane mixtures. The improved PHSC model has fewer parameters and shows little loss of overall calculation accuracy compared to BWRS.

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Modeling the volumetric properties of metals from heat of vaporization

Mozaffari

2016

Journal of Molecular Liquids

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A modified perturbed hard-sphere-chain equation of state for liquid refrigerant mixtures

Cited by 6 publications

References 16 publications

Density and Volumetric Behavior of CO₂ + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

Density and Volumetric Behavior of CO₂ + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

Measurement and Modeling of the Densities for CO₂ + Dodecane System from 313.55 K to 353.55 K and Pressures up to 18 MPa

Modeling the volumetric properties of metals from heat of vaporization

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A modified perturbed hard-sphere-chain equation of state for liquid refrigerant mixtures

Cited by 6 publications

References 16 publications

Density and Volumetric Behavior of CO2 + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

Density and Volumetric Behavior of CO2 + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

Measurement and Modeling of the Densities for CO2 + Dodecane System from 313.55 K to 353.55 K and Pressures up to 18 MPa

Modeling the volumetric properties of metals from heat of vaporization

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Product

Resources

About

Density and Volumetric Behavior of CO₂ + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

Density and Volumetric Behavior of CO₂ + Undecane System from 313.15 to 353.15 K and Pressures up to 19 MPa

Measurement and Modeling of the Densities for CO₂ + Dodecane System from 313.55 K to 353.55 K and Pressures up to 18 MPa