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A general nonlinear prediction model for binary interaction parameter of vdW mixing rules in PR EOS for phase Equilibria of HFO mixtures.

Author(s) : LIU H., ZHANG Y., TAN Y., LI X., WANG L.

Type of article: IJR article

Summary

Mixtures containing HFOs have emerged as promising alternatives to HFCs due to their environmentally friendly properties, and the vapor-liquid equilibrium (VLE) of HFO-containing mixtures is a critical thermodynamic property for practical engineering applications. Although the experimental VLE behaviors of HFO mixtures have been investigated, there are studies unavailable on the binary interaction parameters of HFO-containing mixtures in the literature. Therefore, in this work, the model for binary interaction parameter of van der Waals (vdW) mixing rule oriented to Peng–Robinson equation of state is developed to predict the VLE of binary mixtures. The binary interaction parameters in the vdW mixing rules are regressed using experimental VLE data for 64 sets of binary mixtures, and then, on the basis of the regressed binary interaction parameters, a general nonlinear correlation is proposed by incorporating the thermophysical properties, such as critical temperature, critical pressure and acentric factor. The proposed model is subsequently applied to predict the VLE behavior of all 66 sets of binary mixtures, including two independent test cases, and the predicted results are validated against experimental data. The results indicate that the proposed model exhibits high accuracy in predicting bubblepoint pressure, vapor phase mole fraction and relative volatility, and pressure has the average absolute relative deviation of 1.07%, while vapor-liquid mole fraction possesses the average absolute deviation of 0.0059, with the 4.63% average absolute relative deviation of relative volatility, so it is thus clear that the proposed model shows good applicability and accuracy in VLE predictions for HFO-containing mixtures.

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Details

  • Original title: A general nonlinear prediction model for binary interaction parameter of vdW mixing rules in PR EOS for phase Equilibria of HFO mixtures.
  • Record ID : 30034598
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 184
  • Publication date: 2026/04
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2026.01.027

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