The PVT-Behavior of Ethane in the Gaseous and Liquid States

Phillips, Edward M.; Thodos, George

doi:10.2118/1632-g

Society of Petroleum Engineers Journal

1962

DOI: 10.2118/1632-g

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The PVT-Behavior of Ethane in the Gaseous and Liquid States

Edward M. Phillips¹,

George Thodos²

Abstract: A reduced density correlation for the gaseous and liquid regions of ethane has been developed from all the experimental PVT data available in the literature for this substance. Saturated vapor and liquid densities reported for methane, propane and n-butane were utilized to establish the rectilineardiameter line for ethane. This line was then used with the saturated-vapor data for ethane to produce the saturated envelope for this substance. Most of the saturated liquid data reported for ethane were found to be … Show more

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Cited by 7 publications

(1 citation statement)

References 5 publications

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“…(16) Mullins, B.P., Penner, S.S., "Explosion, Detonation, Flammability and Ignition," Part II, Chap. 11 AGARD, Pergammon Press, New York, 1959. (17) Phillips Petrol.…”

mentioning

confidence: 99%

Coefficient of Thermal Expansion. Reduced State Correlation Developed from Ethane P-V-T Data.

Hamrin¹,

Thodos²

1966

J. Chem. Eng. Data

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“…(16) Mullins, B.P., Penner, S.S., "Explosion, Detonation, Flammability and Ignition," Part II, Chap. 11 AGARD, Pergammon Press, New York, 1959. (17) Phillips Petrol.…”

mentioning

confidence: 99%

Coefficient of Thermal Expansion. Reduced State Correlation Developed from Ethane P-V-T Data.

Hamrin¹,

Thodos²

1966

J. Chem. Eng. Data

Self Cite

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The thermal conductivity of nonpolar substances in the dense gaseous and liquid regions

1964

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In 1949 Gamson (13) produced a reduced state correlation from available thermal conductivity data in which the reduced thermal conductivity, k/kc, is plotted against reduced temperature and pressure. Experimental data, which were subsequently obtained, were found to deviate considerably from values resulting from Gamson's correlation ( 4 5 ) . Comings and Nathan (9) combined the Enskog relationships for viscosity and thermal conductivity to obtain an expression for the ratio, k/k", in terms of the viscosity ratio, p /~" , and the quantity, y. In the resulting relationship, the effects of the internal degrees of freedom of the molecules are neglected. Values of y were obtained from experimental P-V-T data as suggested by Enskog (lo), and experimental and calculated viscosities were used to develop a correlation between k/k* and reduced temperature and pressure. Lenoir and Comings (29) found that their experimental thermal conductivities for argon, nitrogen, methane, ethylene, and carbon dioxide were in good agreement with those resulting from the correlation of Comings and Nathan. Lenoir, Junk, and Comings (30) used their experimental values for nitrogen, methane, and argon, and the values obtained previously by Lenoir and Comings to develop a new correlation for k/k* which is very similar to that of Comings and Nathan, except that it predicts higher values for conditions in the vicinity of the critical point. Thermal-conductivity values determined by Lenoir, Junk, and Comings for ethane were found to be inconsistent with corresponding values resulting from their correlation, as were the subsequent values obtained by Leng and Comings (28) for propane and those of Kramer and Comings (27) for n-butane. Therefore, it would be desirable to develop an improved correlation for thermal conductivity which is also applicabIe to a wider range of substances.Jossi, Stiel, and Thodos (20) have obtained reliable expressions for the viscosity of pure substances in the dense gaseous and liquid phases by the use of a relationship between the residual viscosity, p -EL*, and density, along with a dimensional analysis approach. Thodos and coworkers (22, 38, 47, 48) have found that the residual thermal conductivity, k -k*, is a unique function of density for all the substances investigated. A theoretica1 basis for such a dependence has been provided by Predvoditelev (41). Therefore, in the present study an approach similar to that of Jossi, Stiel, and Thodos for viscosity has been utilized to develop a generalized correlation for the thermal conductivity of nonpolar substances by the use of the residual relationship for this property and dimensional analysis.Leonard I . Stiel is with Syracuse University, Syracuse, New York. DIMENSIONAL ANALYSISSeveral investigators have suggested that the thermal conductivity in the dense gaseous and liquid regions is dependent on Cp, the heat capacity (10, 12). If th' is variable is included in a dimensional analysis treatment of the residual relationship, the resulting expression would indicate th...

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Three‐parameter cubic equation of state for pure components of heavy oils

Kumar

Henni

2010

Can J Chem Eng

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A three-parameter cubic equation of state for pure hydrocarbons is proposed to model PVT properties of heavy hydrocarbons found in heavy oils. Thirty hydrocarbons up to C40 and some commonly found (associated) non-hydrocarbons in heavy oils have been used to regress the parameters. Predicted results from the proposed equation for the liquid density, vapour pressure, saturated liquid density, and saturated vapour density have been compared with the widely used Peng-Robinson (PR), Soave-Redlich-Kwong (SRK), and Patel and Teja (PT) equations of state.With the increase in carbon number in hydrocarbon, the % average absolute errors in liquid density, vapour pressure, and saturated liquid density prediction using PR, SRK, and PT equations of state were found to increase, whereas the proposed equation shows consistency in the prediction, with a % average absolute error of 2.5% only.Uneéquation d'état cubiqueà trois paramètres pour hydrocarbures purs est proposée pour modéliser les propriétés PVT d'hydrocarbures lourds que l'on trouve dans les pétroles lourds. Trente hydrocarbures allant jusqu'à C40 et certains autres composés non hydrocarbures que l'on trouve couramment (associés) dans les pétroles lourds ontété utilisés pour la régression des paramètres. Les résultats prédits provenant de l'équation proposée pour la densité de liquide, la pression de vapeur, la densité de liquide saturé et la densité de vapeur saturée ontété comparés avec leś equations d'état largement utilisées de Peng-Robinson (PR), Soave-Redlich-Kwong (SRK) et Patel et Teja (PT). Avec l'augmentation du nombre d'atomes de carbone dans l'hyrocarbure, les erreurs absolues moyennes en % augmentent sur les prédictions de la densité de liquide, de la pression de vapeur et la densité de liquide saturé en utilisant leséquations d'état de PR, SRK et PT. En revanche, l'équation proposée montre une certaine homogénéité avec les prédictions, avec une erreur absolue moyenne en pourcentage de 2,5 seulement.

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The PVT-Behavior of Ethane in the Gaseous and Liquid States

Cited by 7 publications

References 5 publications

Coefficient of Thermal Expansion. Reduced State Correlation Developed from Ethane P-V-T Data.

Coefficient of Thermal Expansion. Reduced State Correlation Developed from Ethane P-V-T Data.

The thermal conductivity of nonpolar substances in the dense gaseous and liquid regions

Three‐parameter cubic equation of state for pure components of heavy oils

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