The Critcal Properties of Elements and Compounds.

Kobe, Kenneth A.; Lynn, R. Emerson.

doi:10.1021/cr60161a003

Cited by 283 publications

(100 citation statements)

References 42 publications

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“…Some deviations of the compressibility factor of ethyl alcohol from the linear normal fluid relationship were detected for the dilute gaseous region, including the critical point, when the critical constants utilized previously for this substance (Kobe and Lynn, 1953) were employed. However, by the use of the more recent critical constants determined by Skaates and Kay ( 1964), compressibility factors of ethyl alcohol could be calculated with good accuracy from the normal fluid relationship for the dilute gaseous region, while somewhat larger deviations resulted at higher pressures (with a maximum error of approximately 5 % ) .…”

Section: Gaseous Regionmentioning

confidence: 86%

Compressibility factor of polar fluids in the gaseous and liquid regions

1973

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The tables of Pitzer et al. for the compressibility factor of nonpolar substances have been extended to polar fluids for the gaseous and liquid regions for reduced temperatures from 0.8 to 1.15 and reduced pressures from 0.2 to 6.0. Available experimental PVT data for polar fluids were related to the acentric factor and fourth parameter at constant reduced temperature and pressure by a quadratic least squares procedure. The resulting relationships reproduced the data utilized with good accuracy for the entire region considered. GORDON CONCLUSIONS AND SIGNIFICANCEThe compressibility factor of polar fluids has been expressed aswhere the parameters w and x are defined through the vapor pressure, and z ( 0 ) and dl) have been previously determined for nonpolar fluids. In this study, values of the polar fluid correction terms zC2), z C 3 ) , and z (~) were established for the gaseous and liquid regions for reduced temperatures from 0.8 to 1.15 and reduced pressures from 0.2 to 6.0. Available experimental PVT data for polar fluids were related to w and x at constant TR and P R by a qua-(1) dratic least squares procedure. Fine grid values of the functions were determined for P R from 1.0 to 2.0 and TR from 0.98 to 1.10.In general, the tabulated functions reproduce the experimental compressibility factors utilized with an accuracy comparable to that obtained by this procedure for nonpolar fluids. Additional PVT data for acetone at elevated pressures in the gaseous and liquid regions were also compared with the values calculated by the method of this study, and an average deviation of under 1.0% resulted. The method of this study enables the accurate calculation of compressibility factors for polar fluids with ranges of parameters 0 < w < 0.65 and -0.06 < x < 0.04.For dilute polar gases, Hall and Ibele (1954) presented a correlation for the compressibility factor in which the reduced dipole group p2/Tcvc is the third parameter. Eubank and Smith (1962) extended the correlations of Pitzer et al. (1955) for nonpolar fluids to the thermodynamic properties of dilute polar gases by the use of a fourth parameter involving the reduced dipole group. This approach requires a value of the shape parameter for an appropriate nonpolar substance having the same size as the polar fluid and is primarily restricted to organic substances.For an intermolecular potential model for polar fluids consisting of the Kihara spherical core potential extended with a term for dipole-dipole interactions, the compressibility factor can be expressed in dimensionless form as

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Section: Gaseous Regionmentioning

confidence: 86%

Compressibility factor of polar fluids in the gaseous and liquid regions

1973

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“…(13) The selected mixing rule to compute densities was proposed by Kay (modified combination of Prausnitz-Gunn). (14)(15)(16) In what is referred to as refractive indices on mixing, the experimental data were compared with the predicted results for the mixing rule proposed by Lorentz-Lorenz, which is expressed by the equation:…”

Section: Estimation Of Physical Propertiesmentioning

confidence: 99%

Thermodynamics of (anisole + benzene, or toluene, orn-hexane, or cyclohexane, or 1-butanol, or 1-pentanol) atT= 298.15 K

Orge

Marino²,

Iglesias³

et al. 2000

The Journal of Chemical Thermodynamics

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“…The correlation result is shown in Figure 1 and the glass transition temperature of these polymeric materials is compiled in Table 1. The critical constants of gases were taken from Kobe and Lynn (1953).…”

Section: (4)mentioning

confidence: 99%

A generalized correlation of gas permeation constants

Li¹

1974

AIChE Journal

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The Critcal Properties of Elements and Compounds.

Cited by 283 publications

References 42 publications

Compressibility factor of polar fluids in the gaseous and liquid regions

Compressibility factor of polar fluids in the gaseous and liquid regions

Thermodynamics of (anisole + benzene, or toluene, orn-hexane, or cyclohexane, or 1-butanol, or 1-pentanol) atT= 298.15 K

A generalized correlation of gas permeation constants

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