Vapor-liquid equilibria for the binary difluoromethane (R-32) + propane (R-290) mixture

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12 Citations (Scopus)


The vapor-liquid equilibrium of the mixture composed of difluoromethane (R-32) and propane (R-290) was studied in the temperature range between 273.15 and 313.15 K. The experimental uncertainties of temperature, pressure, and composition measurements were estimated to be within ± 10 mK, ± 3 kPa, and ± 0.4 mol%, respectively. Comparisons between the present data and available experimental data were made using the Helmholtz free energy mixture model (HMM) adopted in the thermophysical properties program package, REFPROP 6.0, as a baseline. In addition, the existence of an azeotrope and the determination of new adjustable parameters for HMM for the R-32 + R-290 mixture are discussed.

Original languageEnglish
Pages (from-to)507-518
Number of pages12
JournalInternational Journal of Thermophysics
Issue number2
Publication statusPublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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