Measurement of the (p, $$\rho $$ , T) Properties for Pure Hydrocarbons at Temperatures up to 600 K and Pressures up to 200 MPa

Itô, Takashi; Nagata, Yuichi; Miyamoto, Hiroyuki

doi:10.1007/s10765-012-1383-x

Cited by 8 publications

(11 citation statements)

References 20 publications

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“…[20]. Since then, six further data sets for the density were published by Kumagai et al [45], Miyamoto and Uematsu [46][47][48], Ito et al [49], and Herrmann and Vogel [50]. Furthermore, independent of this work Meschkat and Meier [51] measured the density of n-butane on the two isotherms 300 K and 320 K up to 100 MPa with a vibratingtube densimeter in our laboratory.…”

Section: Densitymentioning

confidence: 85%

“…15 and 16. The data of Glos et al [6], Haynes [56], Ito et al [49], Kayukawa et al [52], Meschkat and Meier [51], Miyamoto and Uematsu [46], and Olds et al [59] overlap with the region of the thermodynamic integration and were selected for the comparison. All other data from the literature either lie on the boiling line, in the temperature range below or above the domain of the thermodynamic integration, or their deviations from the EOS are mostly larger than the scale of the plots.…”

Section: Densitymentioning

confidence: 99%

“…The grey-shaded region represents the region of thermodynamic integration. Experimental data: , Arve et al[55]; , Glos et al[6]; , Gupta and Eubank[53]; , Haynes[56]; , Herrmann and Vogel[50]; , Ito et al[49];, Kay[60]; , Kayukawa et al[52]; , Kiran and Sen[54]; , Kumagai et al[45]; , MacCallum and McKetta[57]; , Meschkat and Meier[51]; , Miyamoto and Uematsu[46]; , Miyamoto and Uematsu[48]; , Olds et al[59]; , Petty and Smith[58]; and , Sage et al[61]. , Critical pressure, critical temperature, and , vapor pressure calculated with the EOS of Bücker and Wagner[20]…”

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confidence: 99%

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confidence: 99%

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Thermodynamic Properties of Liquid Toluene and n-Butane Determined from Speed of Sound Data

Hawary

Meier

2022

Int J Thermophys

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The method of thermodynamic integration is applied to calculate accurate data for the density and isobaric and isochoric heat capacity of toluene and n-butane from speed of sound data sets measured previously in our laboratory. Values for the density and isobaric heat capacity on the initial isobar for the integration are derived from very accurate density and speed of sound data sets using well-known thermodynamic relations. The relative expanded uncertainties (at the 0.95 confidence level) in the derived values for the density and isobaric and isochoric heat capacities are estimated to be 0.011 %, 0.3 %, and 0.4 % for toluene and 0.02 %, 0.5 %, and 0.7 % for n-butane, respectively. Comparisons with experimental data, values of other authors derived by the thermodynamic integration, and equations of state show that our values for both fluids are more accurate than most data available in the literature. Moreover, the domain of the thermodynamic integration for toluene extends down to 240 K and covers lower temperatures than recently considered by other authors. The derived values for the isobaric heat capacity of n-butane fill a gap as this property has hitherto only been measured at ambient pressure. Because of their low uncertainty, the values of the derived properties reported in this work in combination with recent data of other authors are useful for developing new and improved equations of state for both fluids.

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Section: Densitymentioning

confidence: 85%

Section: Densitymentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Thermodynamic Properties of Liquid Toluene and n-Butane Determined from Speed of Sound Data

Hawary

Meier

2022

Int J Thermophys

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“…In this section, the derived properties are compared to the formulation of Bücker and Wagner and literature data. The distribution of the available literature data for the density of single-phase isobutane ,− and the domain of the thermodynamic integration in the fluid region are shown in Figure . The data of Glos et al, Perkins and Magee, Haynes, Kayukawa et al, and Miyamoto and Uematsu overlap with the domain of the thermodynamic integration and are compared with the derived densities.…”

Section: Comparison Of Derived Properties With Literature Datamentioning

confidence: 99%

Speed-of-Sound Measurements and Derived Thermodynamic Properties of Liquid Isobutane

Hawary

Meier

2018

J. Chem. Eng. Data

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This article reports comprehensive and accurate measurements of the speed of sound in liquid isobutane. The measurements were carried out by a double-path-length pulse-echo technique and cover the temperature range between 200 and 420 K with pressures of up to 100 MPa. The expanded measurement uncertainties (at the 0.95 confidence level) are 2.1 mK for temperature, 0.007% for pressure, and 0.009% for the speed of sound with the exception of a few state points at low pressures and in the vicinity of the critical point, where it increases up to 0.035%. Furthermore, densities and specific isobaric and isochoric heat capacities were derived from the speed-of-sound data in the temperature range between 200 and 340 K and up to 100 MPa by the method of thermodynamic integration. Very accurate results for the derived properties were obtained by determining values of the isobaric heat capacity on the initial isobar for the integration by a well-known thermodynamic relation among the isobaric heat capacity, density, and speed of sound from very accurate density data at low pressures of (Glos, S.; Kleinrahm, R.; Wagner, W. J. Chem. Thermodyn. 2004, 36, 1037−1059) and our speed-of-sound data. Moreover, these initial values were manually adjusted to enforce physically correct behavior of the calculated derivatives of the equation of state. Comparisons of the experimental speeds of sound and derived properties with the Helmholtz energy formulation of Bucker and Wagner for isobutane (Bucker, D.; Wagner, W. J. Phys. Chem. Ref. Data 2006Data , 35, 929−1019 and data from the literature demonstrate the high accuracy of the results and reveal potential to improve the formulation.

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Density of Methylcyclohexane at Temperatures up to 600 K and Pressures up to 200 MPa

et al. 2017

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Measurement of the (p, $$\rho $$ , T) Properties for Pure Hydrocarbons at Temperatures up to 600 K and Pressures up to 200 MPa

Cited by 8 publications

References 20 publications

Thermodynamic Properties of Liquid Toluene and n-Butane Determined from Speed of Sound Data

Thermodynamic Properties of Liquid Toluene and n-Butane Determined from Speed of Sound Data

Speed-of-Sound Measurements and Derived Thermodynamic Properties of Liquid Isobutane

Density of Methylcyclohexane at Temperatures up to 600 K and Pressures up to 200 MPa

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