Vapor-liquid equilibrium, coexistence curve, and critical locus for binary HFC-32/HFC-134a mixture

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Abstract

Two kinds of equilibrium measurements of binary R-32/134a mixtures were carried out. The vapor-liquid equilibria were measured by the static method in the temperature range between 283 and 313 K. On the basis of the present experimental data, the temperature dependence of the binary interaction parameter k12 for two equations of state, namely, the Soave-Redlich-Kwong equation and Carnahan-Starling-De Santis equation, was discussed. The vapor-liquid coexistence curve near the critical point was also measured by the observation of meniscus disappearance. The critical temperatures and critical densities of 30 and 70 wt% R-32 mixtures were determined on the basis of the saturation densities along the coexistence curve in the critical region. In addition, a correlation of the critical locus for this mixture is proposed as a function of composition.

Original languageEnglish
Pages (from-to)1175-1184
Number of pages10
JournalInternational Journal of Thermophysics
Volume16
Issue number5
DOIs
Publication statusPublished - Sep 1995
Externally publishedYes

Fingerprint

norflurane
liquid-vapor equilibrium
loci
Phase equilibria
curves
menisci
Equations of state
Temperature
critical point
critical temperature
equations of state
Vapors
vapors
saturation
temperature dependence
Liquids
liquids
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • Mechanics of Materials
  • Computational Mechanics
  • Physical and Theoretical Chemistry
  • Fluid Flow and Transfer Processes

Cite this

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title = "Vapor-liquid equilibrium, coexistence curve, and critical locus for binary HFC-32/HFC-134a mixture",
abstract = "Two kinds of equilibrium measurements of binary R-32/134a mixtures were carried out. The vapor-liquid equilibria were measured by the static method in the temperature range between 283 and 313 K. On the basis of the present experimental data, the temperature dependence of the binary interaction parameter k12 for two equations of state, namely, the Soave-Redlich-Kwong equation and Carnahan-Starling-De Santis equation, was discussed. The vapor-liquid coexistence curve near the critical point was also measured by the observation of meniscus disappearance. The critical temperatures and critical densities of 30 and 70 wt{\%} R-32 mixtures were determined on the basis of the saturation densities along the coexistence curve in the critical region. In addition, a correlation of the critical locus for this mixture is proposed as a function of composition.",
author = "Yukihiro Higashi",
year = "1995",
month = "9",
doi = "10.1007/BF02081285",
language = "English",
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pages = "1175--1184",
journal = "International Journal of Thermophysics",
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T1 - Vapor-liquid equilibrium, coexistence curve, and critical locus for binary HFC-32/HFC-134a mixture

AU - Higashi, Yukihiro

PY - 1995/9

Y1 - 1995/9

N2 - Two kinds of equilibrium measurements of binary R-32/134a mixtures were carried out. The vapor-liquid equilibria were measured by the static method in the temperature range between 283 and 313 K. On the basis of the present experimental data, the temperature dependence of the binary interaction parameter k12 for two equations of state, namely, the Soave-Redlich-Kwong equation and Carnahan-Starling-De Santis equation, was discussed. The vapor-liquid coexistence curve near the critical point was also measured by the observation of meniscus disappearance. The critical temperatures and critical densities of 30 and 70 wt% R-32 mixtures were determined on the basis of the saturation densities along the coexistence curve in the critical region. In addition, a correlation of the critical locus for this mixture is proposed as a function of composition.

AB - Two kinds of equilibrium measurements of binary R-32/134a mixtures were carried out. The vapor-liquid equilibria were measured by the static method in the temperature range between 283 and 313 K. On the basis of the present experimental data, the temperature dependence of the binary interaction parameter k12 for two equations of state, namely, the Soave-Redlich-Kwong equation and Carnahan-Starling-De Santis equation, was discussed. The vapor-liquid coexistence curve near the critical point was also measured by the observation of meniscus disappearance. The critical temperatures and critical densities of 30 and 70 wt% R-32 mixtures were determined on the basis of the saturation densities along the coexistence curve in the critical region. In addition, a correlation of the critical locus for this mixture is proposed as a function of composition.

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