Experimental determination of ultrasonic speeds in (methane + propane)(g) and in (methane + octane)(g) at high pressures

Lagourette, B.; Daridon, Jean-Luc; Gaubert, J.F.; Xans, P.

doi:10.1006/jcht.1994.1123

Cited by 12 publications

(9 citation statements)

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“…The speed of sound has already been estimated by correspondingstates models [7][8][9][42][43][44][45][46][47][48], although in most of these studies only simple fluids, such as liquefied gases, refrigerants, and hydrocarbons with chain lengths smaller than n-octane were considered.…”

Section: Resultsmentioning

confidence: 99%

“…In the first one, compressibility factors are directly obtained from the model and other properties, such as the speed of sound, are obtained through thermodynamic relations [7][8][9]. The second approach is to obtain directly the speed of sound through the expansion of the reduced speed of sound in the Pitzer acentric factor (Eqs.…”

Section: Resultsmentioning

confidence: 99%

“…Among the different models for the estimation of speeds of sound, the corresponding-states theory, namely the Lee-Kesler approach [6] has proved to be one of the most accurate models [7][8][9], although some large deviations have been recently found for the heavier n-alkanes [9].…”

Section: ρ (T P) = ρ (P Atm T ) +mentioning

confidence: 99%

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Corresponding-States Modeling of the Speed of Sound of Long-Chain Hydrocarbons

Queimada

Coutinho²,

Marrucho³

et al. 2006

Int J Thermophys

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Models based on the corresponding-states principle have been extensively used for several equilibrium and transport properties of different pure and mixed fluids. Some limitations, however, have been encountered with regard to its application to long chain or polar molecules. Following previous studies, where it was shown that the corresponding-states principle could be used to predict thermophysical properties such as vapor-liquid interfacial tension, vapor pressure, liquid density, viscosity, and thermal conductivity of longchain alkanes, the application of the corresponding-states principle to the estimation of speeds of sound, with a special emphasis on the less studied heavier n-alkane members, is presented. Results are compared with more than four thousand experimental data points as a function of temperature and pressure for n-alkanes ranging from ethane up to n-hexatriacontane. Average deviations are less than 2%, demonstrating the reliability of the proposed model for the estimation of speeds of sound.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Corresponding-States Modeling of the Speed of Sound of Long-Chain Hydrocarbons

Queimada

Coutinho²,

Marrucho³

et al. 2006

Int J Thermophys

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“…On several occasions we have been able to demonstrate its interesting potential, whether with gaseous-type mixtures [15][16][17] or liquid-type mixtures [ 18,19].…”

Section: Ieu -2 I E P(p T)=p(pi R)+ Dp+ T Od/cedpmentioning

confidence: 98%

Compressibilities of ternary mixtures C1-nC16-CO2 under pressure from ultrasonic measurements of sound speed

1996

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Speed of sound measurements have been performed on three mixtures of the ternary system methane + carbon dioxide + normal hexadecane. The systems have been investigated from 12 to 70 MPa in the temperature range from 313 to 393 K. Furthermore, these measurements have allowed the evaluation of the isothermal and the isentropic compressibilities up to 70 MPa from low pressure (<40-MPa) density data.KEY WORDS: compressibility; equation of state; high pressure; speed of sound.

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“…The fluids being either light volatile oils or gas condensates are characterized by an asymmetrical compositional distribution. The simultaneous presence of large methane fractions, in excess of 60 mol %, and significant amounts of heavy-end hydrocarbons up to tetracontane not only cause high dew-and/or bubblepoint pressures but also account for the possible precipitation of solid hydrocarbon phases during production and processing (Ungerer et al, 1995;Montel, 1993;Lagourette et al, 1994;Daridon et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

High-Pressure Phase Equilibria in the Binary System (Methane + 5-α-Cholestane)

Floeter¹,

Brumm²,

Loos³

et al. 1997

J. Chem. Eng. Data

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In this paper, experimental data on the phase behavior of the binary system (methane + 5-α-cholestane) are presented. Experiments were carried out according to the synthetic method. The temperature range investigated was from 320 K to 450 K. The pressures applied did not exceed 250 MPa. Vapor−liquid equilibria have been measured for 18 different mixtures. Additionally, the melting curve of pure 5-α-cholestane and the course of the three-phase curve (solid 5-α-cholestane + liquid + vapor) was determined. The second critical end point was located at a temperature T = (342.2 ± 0.5) K, a pressure p = (193.3 ± 0.4) MPa, and a mole fraction of 5-α-cholestane in the critical fluid phase x = 0.049 ± 0.004.

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Experimental determination of ultrasonic speeds in (methane + propane)(g) and in (methane + octane)(g) at high pressures

Cited by 12 publications

References 0 publications

Corresponding-States Modeling of the Speed of Sound of Long-Chain Hydrocarbons

Corresponding-States Modeling of the Speed of Sound of Long-Chain Hydrocarbons

Compressibilities of ternary mixtures C1-nC16-CO2 under pressure from ultrasonic measurements of sound speed

High-Pressure Phase Equilibria in the Binary System (Methane + 5-α-Cholestane)

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