Thermodynamic Property Measurements for Trifluoromethyl Methyl Ether and Pentafluoroethyl Methyl Ether

Kayukawa, Yohei; Hasumoto, Masaya; Hondo, Takashi; Kano, Yasunobu; Watanabe, Koichi

doi:10.1021/je025657+

Cited by 16 publications

(15 citation statements)

References 12 publications

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“…where a(T r ) ) ∑ i ) 0 2 a i (T r ) i and critical density F c is 272 kg • m -3 determined by Wu et al 15 The functional form in this work is used as the same that by Kayukawa 16,17 adopted for some hydrofluoroethers (HFEs) and hydrocarbons (HCs). Its original function was proposed by Sato.…”

Section: Resultsmentioning

confidence: 99%

“…The values are listed in Table and are plotted on the pressure−density diagram of Figure . The densities were correlated as ρ = ρ c ( p normalr + a ( T normalr ) ) b c where a ( T r ) = ∑ i = 0 2 a i ( T r ) i and critical density ρ c is 272 kg·m −3 determined by Wu et al The functional form in this work is used as the same that by Kayukawa , adopted for some hydrofluoroethers (HFEs) and hydrocarbons (HCs). Its original function was proposed by Sato .…”

Section: Resultsmentioning

confidence: 99%

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Measurements of the Isobaric Specific Heat Capacity and Density for Dimethyl Ether in the Liquid State

Tanaka

Higashi

2010

J. Chem. Eng. Data

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The isobaric specific heat capacity and density for dimethyl ether were measured in the temperature range from (310 to 360) K at pressures up to 5 MPa in the liquid state. Measurements were conducted by the metal-bellows calorimeter. The uncertainties of isobaric specific heat capacity and density measurements were estimated to be less than 5 % and 0.2 %, respectively. Experimental values for the isobaric specific heat capacity and density were correlated as functions of pressure and temperature. In addition, the saturated liquid isobaric specific heat capacity and saturated liquid density were obtained from extrapolation of these correlations to the vapor pressure.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Measurements of the Isobaric Specific Heat Capacity and Density for Dimethyl Ether in the Liquid State

Tanaka

Higashi

2010

J. Chem. Eng. Data

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“…Nearly the same number of data were also obtained for the ternary system propane (1) + n-butane (2) + isobutane (3). The measurement system has been reported by the present authors 7 and has been used for pure refrigerant measurements, including those for hydrofluoroethers 8 and hydrocarbons. 9 The PVTx data were compared with the available mixture models.…”

Section: Introductionmentioning

confidence: 99%

Liquid-Phase Thermodynamic Properties for the Binary and Ternary Systems of Propane (1), n-Butane (2), and Isobutane (3)

et al. 2005

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Experimental thermodynamic property data for hydrocarbon refrigerant mixtures are more important now in order to improve the performance of existing equations of state. In the present paper, liquid-phase PVTx data including bubble points for the binary and ternary systems composed of propane (1), n-butane (2), and isobutane (3) are reported. More than 1000 measurements were made by employing a newly developed vibrating-tube densimeter system with an uncertainty of 0.1 kg·m-3 + 0.024% for density, (3 to 7) mK for temperature, 0.26 kPa + 0.022% for pressure, and 0.1 mol % for composition. The present data contain the first set of experimental PVTx data for the ternary system. The measured data are compared with two available thermodynamic mixture models developed by Lemmon and Jacobsen and Miyamoto and Watanabe. A mixture model applied for a modified Tait equation of state is also presented in this paper.

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“…In addition, the present numerical data for the hydrofluoroethers are shown in Ref. 8, and those for the hydrocarbons will be reported elsewhere [9].…”

Section: Measurement Resultsmentioning

confidence: 92%

Rapid Measurements of Thermodynamic Properties for Alternative Refrigerants with Vibrating-Tube Densimeter

et al. 2005

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More than 2000 PVT data in the liquid phase, vapor phase, and at saturation boundaries have been obtained for pure compounds of several alternative refrigerants. In addition, more than 1000 liquid-density data have been obtained for several binary and ternary mixtures. The alternative refrigerants measured in the present study include CF 3 OCH 3 (trifluoromethyl methyl ether) and CF 3 CF 2 OCH 3 (pentafluoroethyl methyl ether), which are hydrofluoroethers developed by RITE (the Research Institute of Innovative Technology for the Earth, Japan), and typical hydrocarbons, such as propane, n-butane, isobutene, and their binary and ternary mixtures. The measurement uncertainties are estimated to be 3 to 7 mK for temperature, 0.26 kPa or 0.022% whichever is greater for pressure, and 0.07 kg · m −3 or 0.024% whichever is greater for density. The present measurement system took only a few minutes to get one PVT datum, and one or two days to complete all the measurements for a single fluid at temperatures from 240 to 380 K and at pressures up to 7 MPa. In addition, an empirical equation of state (EoS) for the liquid phase was developed on the basis of the present data, and the EoS nicely reproduces not only the present data but also existing data reported by other researchers.

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Thermodynamic Property Measurements for Trifluoromethyl Methyl Ether and Pentafluoroethyl Methyl Ether

Cited by 16 publications

References 12 publications

Measurements of the Isobaric Specific Heat Capacity and Density for Dimethyl Ether in the Liquid State

Measurements of the Isobaric Specific Heat Capacity and Density for Dimethyl Ether in the Liquid State

Liquid-Phase Thermodynamic Properties for the Binary and Ternary Systems of Propane (1), n-Butane (2), and Isobutane (3)

Rapid Measurements of Thermodynamic Properties for Alternative Refrigerants with Vibrating-Tube Densimeter

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