Volumetric properties of liquid propylene

Zordan, T.; Henry, Raymond M.

doi:10.1021/je60066a010

Cited by 10 publications

(1 citation statement)

References 11 publications

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“…We found that neither the original form of the Hudleston (1937) Benson and Winnick (1971); and Kumagai et al (1976) treated the constant B as a linear or quadratic function of temperature, decreasing as the temperature increased. Cutler et al; Nanda and Simha (1964); McDuffie et al;and Zordan and Henry (1975) treated C as a constant while Ginell (1961); Neece and Squire; and Kumagai considered it to be a weak function of temperature. Snyder and Winnick (1970) selected the values for B and C which fit their data best.…”

Section: Hudleston Equationmentioning

confidence: 99%

An improved correlation for densities of compressed liquids and liquid mixtures

1982

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The Tait equation has been extended and generalized to permit the calculation of densities of compressed liquids and their mixtures to a pressure of 68,950 kPa (l0,ooO psia) using only critical temperature, critical pressure, Soave-Redlich-Kwong acentric factor, saturation pressure, and saturated volume for a pure liquid or the corresponding mixture parameters for a liquid mixture. This correlation, together with the correlation developed by Hankinson and Thomson (1979) (1965,1969). In order to achieve acceptable accuracy, the Yen-Woods (1966) correlation requires specific parameters for each compound. The Tait (1888) and Hudleston (1937) equations also lack mixing rules and have generally been used to fit and smooth experimental data.In this work the Tait equation was extended and its parameters were generalized as functions of an acentric factor derived from the Soave-Redlich-Kwong equation of state, critical temperature, and critical pressure. The saturated density and saturation pressure of the liquid which are used in the Tait equation were calculated using the saturated liquid density correlation developed by Hankinson and Thomson (1979) and a generalized vapor pressure equation. The two density correlations together comprise COSTALD, a unified method of estimating saturated and compressed densities of pure liquids and liquid mixtures. CONCLUSIONS AND SIGNIFICANCEThe Tait (1888) equation has been extended to permit accurate prediction of compressed densities of a wide variety of liquids and mixtures for temperatures in the general range of 50 to 600 K and pressures from saturation to 68,950 kPa (l0,ooO psia) using only critical temperature, critical pressure, SRK acentric factor, saturated volume, and saturation pressure for a pure liquid or the corresponding parameters for a mixture.A universal temperature dependence for all nonpolar and slightly polar liquids and mixtures was determined for the constant B in the Tait equation. Both Tait equation constants, B and C , were generalized as functions of the SRK acentric factor. Densities calculated using the extended Tait equation in conjunction with a saturated liquid density equation, COS-TALD (Corresponding STAtes Liquid Density), recently developed by Hankinson and Thomson (1979), were compared with those calculated using the Yen-Woods (1966) method. The data base used for testing consisted of 6,338 density points for pure, nonpolar liquids, 1,352 points for polar and quantum liquids, and 6,926 mixture density points including 319 points for LNG/LPG mixtures.The COSTALD correlation is shown to be the most general and most accurate compressed liquid density correlation yet published. Average absolute errors in densities calculated using COSTALD were 0.446% and 2.57% for pure nonpolar and polar liquids respectively compared to 1.49% and 3.48% errors obtained with the Yen-Woods method. COSTALD gave 0.369% and 1.61% average absolute errors for LNG/LPG mixtures and for all mixtures compared to 1.46% and 2.51% for the YenWoods method.The two parts of the COST...

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Section: Hudleston Equationmentioning

confidence: 99%

An improved correlation for densities of compressed liquids and liquid mixtures

1982

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Saturated liquid densities of normal fluids

Bhirud¹

1978

AIChE Journal

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solution rate due to monomer diffusion are governed by Brownian motion below an order of micron in particle radius, while they are dominated by the convections above the order. Since the r dependence of r / 8 is relatively small in the Brownian motion range, Equation (20) can be practically used instead of Equation (19) if the size distribution ranges not so far from the radius which gives the minimum of r / 8 in the Brownian motion range. ACKNOWLEDGMENT

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Wärmeträger

Hirschberg¹

1988

Wärmeaustauscher

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Volumetric properties of liquid propylene

Cited by 10 publications

References 11 publications

An improved correlation for densities of compressed liquids and liquid mixtures

An improved correlation for densities of compressed liquids and liquid mixtures

Saturated liquid densities of normal fluids

Wärmeträger

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