Phase behavior of the binary refrigerant mixture chlorodifluoro-ethane (R22)-1,1,1,2-tetrafluoro-ethane (R134a)

experimental investigation and theoretical modelling using the perturbed-anisotropic-chain theory (PACT)

Ioannis Economou, C. J. Peters, L. J. Florusse, J. De Swaan Arons

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

This study presents experimental data of the vapor-liquid phase behavior in the binary system of chlorodifluoro-ethane (R22) with 1,1,1,2-tetrafluoro-ethane (R134a). The main objective of the experimental work in this refrigerant system was to verify some unexpected findings with respect to its phase behavior reported earlier by Nishiumi et al. (1993). In the near-critical region of both pure components these authors found a three-phase equilibrium liquid-liquid-vapor with a negative slope in the pressure-temperature projection of this binary mixture. Although not impossible, to the best of our knowledge, this has never been reported in literature before. The present work did not confirm the existence of this three-phase region. In addition to the experimental work, the vapor-liquid data obtained here were modelled by an equation of state specifically designed to take directional forces into account. For that purpose the perturbed-anisotropic-hard-chain Theory (PACT) has been applied. Comparisons with the experimental data are very satisfactory, even without using any binary interaction parameters.

Original languageEnglish
Pages (from-to)239-252
Number of pages14
JournalFluid Phase Equilibria
Volume111
Issue number2
DOIs
Publication statusPublished - 15 Oct 1995
Externally publishedYes

Fingerprint

Ethane
refrigerants
Refrigerants
Phase behavior
ethane
vapors
Vapors
Liquids
liquids
binary mixtures
liquid phases
equations of state
Binary mixtures
projection
Equations of state
Phase equilibria
slopes
interactions
temperature
Temperature

Keywords

  • Binary mixtures
  • Modelling
  • Perturbed anisotropic chain theory
  • Theory

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Physics and Astronomy(all)
  • Fluid Flow and Transfer Processes

Cite this

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title = "Phase behavior of the binary refrigerant mixture chlorodifluoro-ethane (R22)-1,1,1,2-tetrafluoro-ethane (R134a): experimental investigation and theoretical modelling using the perturbed-anisotropic-chain theory (PACT)",
abstract = "This study presents experimental data of the vapor-liquid phase behavior in the binary system of chlorodifluoro-ethane (R22) with 1,1,1,2-tetrafluoro-ethane (R134a). The main objective of the experimental work in this refrigerant system was to verify some unexpected findings with respect to its phase behavior reported earlier by Nishiumi et al. (1993). In the near-critical region of both pure components these authors found a three-phase equilibrium liquid-liquid-vapor with a negative slope in the pressure-temperature projection of this binary mixture. Although not impossible, to the best of our knowledge, this has never been reported in literature before. The present work did not confirm the existence of this three-phase region. In addition to the experimental work, the vapor-liquid data obtained here were modelled by an equation of state specifically designed to take directional forces into account. For that purpose the perturbed-anisotropic-hard-chain Theory (PACT) has been applied. Comparisons with the experimental data are very satisfactory, even without using any binary interaction parameters.",
keywords = "Binary mixtures, Modelling, Perturbed anisotropic chain theory, Theory",
author = "Ioannis Economou and Peters, {C. J.} and Florusse, {L. J.} and {De Swaan Arons}, J.",
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AU - Economou, Ioannis

AU - Peters, C. J.

AU - Florusse, L. J.

AU - De Swaan Arons, J.

PY - 1995/10/15

Y1 - 1995/10/15

N2 - This study presents experimental data of the vapor-liquid phase behavior in the binary system of chlorodifluoro-ethane (R22) with 1,1,1,2-tetrafluoro-ethane (R134a). The main objective of the experimental work in this refrigerant system was to verify some unexpected findings with respect to its phase behavior reported earlier by Nishiumi et al. (1993). In the near-critical region of both pure components these authors found a three-phase equilibrium liquid-liquid-vapor with a negative slope in the pressure-temperature projection of this binary mixture. Although not impossible, to the best of our knowledge, this has never been reported in literature before. The present work did not confirm the existence of this three-phase region. In addition to the experimental work, the vapor-liquid data obtained here were modelled by an equation of state specifically designed to take directional forces into account. For that purpose the perturbed-anisotropic-hard-chain Theory (PACT) has been applied. Comparisons with the experimental data are very satisfactory, even without using any binary interaction parameters.

AB - This study presents experimental data of the vapor-liquid phase behavior in the binary system of chlorodifluoro-ethane (R22) with 1,1,1,2-tetrafluoro-ethane (R134a). The main objective of the experimental work in this refrigerant system was to verify some unexpected findings with respect to its phase behavior reported earlier by Nishiumi et al. (1993). In the near-critical region of both pure components these authors found a three-phase equilibrium liquid-liquid-vapor with a negative slope in the pressure-temperature projection of this binary mixture. Although not impossible, to the best of our knowledge, this has never been reported in literature before. The present work did not confirm the existence of this three-phase region. In addition to the experimental work, the vapor-liquid data obtained here were modelled by an equation of state specifically designed to take directional forces into account. For that purpose the perturbed-anisotropic-hard-chain Theory (PACT) has been applied. Comparisons with the experimental data are very satisfactory, even without using any binary interaction parameters.

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KW - Perturbed anisotropic chain theory

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