Equation of state and thermodynamic properties of propan-1-ol

Abdulagatov, Ilmutdin M.; Степанов, Г. В.; Bouy, O.A

doi:10.1016/s0021-9614(05)80198-3

Cited by 9 publications

(5 citation statements)

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“…The purpose of this paper is to obtain new experimental C V VTx data and (L-L-G, L-L, and L-G) phase transition parameters ( PVTx ) for water + n -hexane mixtures in the critical region. Measurements are to be carried out in the vicinity of the lower branch of the critical curve for water + n -hexane mixtures using the same apparatus as used in our previous papers. − In the present paper we are continuing our previous investigations 40-42 of the C V VTx properties of water + n -hexane mixtures with a high temperature and high pressure and nearly constant volume adiabatic calorimeter. Previously, C V VTx data for water + n -hexane mixtures were reported by Kamilov et al , and Stepanov et al Kamilov et al reported C V VTx and PVTx data for water + n -hexane mixtures at seven compositions, (0.385, 0.655, 0.699, 0.744, 0.753, 0.8, and 0.879) mol fraction of C 6 H 14 , and at temperatures from 365 to 622 K. Pressures ranged from 0.5 to 24 MPa and densities from 191.4 to 416.7 kg·m -3 .…”

Section: Introductionmentioning

confidence: 89%

“…Measurements of the isochoric heat capacity of aqueous n -hexane mixtures were made in a high-temperature, high-pressure nearly constant integrated adiabatic calorimeter, of a design pioneered by Amirkhanov et al The construction, method of measurements, and detailed analysis of all sources of uncertainty of the measurements have been described in our previous papers, − ,− and they will be only briefly reviewed here. For the present measurements we used a calorimeter with a volume of V 0 = 100.085 ± 0.0002 cm 3 at room temperature (25 °C) and atmospheric pressure.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Liquid−Liquid−Vapor, Liquid−Liquid, and Liquid−Vapor Phase Transitions in Aqueousn-Hexane Mixtures from Isochoric Heat Capacity Measurements

et al. 2001

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The constant volume and constant composition heat capacity C VX data for aqueous n-hexane mixtures are reported for seven compositions, (0.6146, 0.7965, 0.9349, 0.9775, 0.9858, 0.9892, and 0.9940) mol fraction of n-hexane, along seven near-critical isochores between 259.34 and 312.50 kg‚m -3 in the temperature range from 463 to 522 K at pressures up to 6 MPa. All of these isochores display two features in the heat capacity as a function of temperature: the first peak appears when one of the liquid phases disappears, and the second peak appears when the vapor or liquid phase disappears. These features are interpreted in terms of the liquid-liquid-vapor, liquid-liquid, and liquid-vapor phase diagram, and their consistency is shown with earlier PTx measurements on the three-phase (L-L-G) boundary. Measurements of the isochoric heat capacity (C V VTx) of water + n-hexane mixtures were made in a spherical high-temperature, high-pressure nearly constant volume adiabatic calorimeter. The calorimeter was also used as a constant-volume piezometer to measure the PVTx properties. The uncertainties of the measurements are as follows: isochoric heat capacity, 1.0-1.5%; density, 0.1%; temperature, 10 mK; and pressure, 0.05%. The method of quasi-static thermograms was used to precisely measure the liquidliquid-gas (L-L-G), liquid-liquid (L-L), and liquid-gas (L-G) phase transition temperatures at each fixed density, with an uncertainty of 0.02 K. New saturated densities and pressures are presented on the (L-L-G) and (L-G) phase boundaries. The values of temperature, pressure, and density of the upper critical end point (UCEP) in the water + n-hexane mixture were determined from the measurements. Results for the UCEP (T UCEP ) 495.82 K; P UCEP ) 5.25 MPa; F UCEP ) 259.9 kg‚m -3 ) are in good agreement with the values reported by other authors. For the first time the temperature-dependent behavior of C VX near the UCEP is reported.

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Section: Introductionmentioning

confidence: 89%

Section: Methodsmentioning

confidence: 99%

Liquid−Liquid−Vapor, Liquid−Liquid, and Liquid−Vapor Phase Transitions in Aqueousn-Hexane Mixtures from Isochoric Heat Capacity Measurements

et al. 2001

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“…Abdulagatov et al [93] developed a nonanalytical EOS for propan-1-ol in a wide temperature and pressure range including the critical and supercritical region. A scaling type crossover SAFT EOS for propan-1-ol was developed by Kiselev et al [129].…”

Section: Equations Of State and Correlationsmentioning

confidence: 99%

“…the curvature (∂ 2 p/∂ 2 T) is almost zero, and the (p, ,T) properties can be very accurately described with linear temperature functions (in practice the curvature can be ignored). It is very difficult to exactly detect in (p, ,T)-experiments the curvature (∂ 2 p/∂ 2 T) of the p-T isochores (see for example Magee co-workers [143,144] and Abdulagatov et al [93]) and this curvature some time ignored. Therefore, [128]; ( ), [119]; (×), [38,39]; ( ), [129]; (+), [76]; ( ), [118]; (♦), [125]; ( ), [47]; ( ), [48]; ( ), [127]; ( ), [138]; ( ), [69]; ( ), [126]; (---), this work calculated with Tait EOS (18); (----), Khasanshin [92]; (·········), Marczak et al [47].…”

Section: Derived Propertiesmentioning

confidence: 99%