Vapor-liquid equilibria for the binary system of 1,1-difluoroethane (HFC-152a) + n-butane (R-600) at various temperatures

Jong Sung Lim, Gimyeong Seong, Hun Soo Byun

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24 Citations (Scopus)


Isothermal vapor-liquid equilibrium data for the binary systems of 1,1-difluoroethane (HFC-152a) + n-butane were measured at 273.15, 283.15, 293.15, 303.15, 313.15 and 323.15 K, respectively. The experiments were carried out using a circulation-type equilibrium apparatus to measure temperature, pressure, and the compositions of the liquid and vapor phases. The experimental data were correlated with the Peng-Robinson equation of state (EOS) using the Wong-Sandler mixing rules and the Carnahan-Starling-De Santis equation of state (CSD EOS). Calculated results showed good agreement with experimental data. It was found that this system has very strong positive azeotropes for all the temperature ranges studied here.

Original languageEnglish
Pages (from-to)165-172
Number of pages8
JournalFluid Phase Equilibria
Issue number2
Publication statusPublished - 2007 Oct 15
Externally publishedYes


  • Carnahan-Staring-De Santis equation of state (CSD EOS)
  • HFC-152a
  • Peng-Robinson equation of state (PR EOS)
  • Vapor-liquid equilibria (VLE)
  • n-Butane (R-600)

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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