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Journal of Thermal Analysis and Calorimetry

, Volume 113, Issue 3, pp 1551–1554 | Cite as

The shapes of critical loci of binary fluid mixtures on the pT plane

The relations of those shapes with the positions of the critical points of their component fluids
  • Koki Tsukamoto
  • Guosong Fang
  • Masahiro Maebayashi
  • Masaharu Ohba
Article

Abstract

The relations between the shapes of the critical loci of binary fluid mixtures and the positions of the critical points of their component fluids on the pT plane were considered theoretically. The consideration was carried out for vapor–liquid phase equilibria in the model systems without liquid–liquid equilibria. We focused only the relations between the shapes and the tangent of the straight lines connecting the critical points of the component fluids on the pT plane, and so the effects of the distance between the critical points were out of the scope of this work. The changes in the shapes of the critical loci were classified logically into three patterns. Literature survey has shown that the two patterns exist in the experimental results for several types of mixtures. The shapes of the critical loci of the binary fluid mixtures on the pT plane are closely related to the relative positions between the critical points of their component fluids.

Keywords

Supercritical fluid Critical point Binary mixture Critical locus Phase diagram 

Notes

Acknowledgments

This work was partly supported by the fund for Agriomics project from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2013

Authors and Affiliations

  • Koki Tsukamoto
    • 1
  • Guosong Fang
    • 1
  • Masahiro Maebayashi
    • 1
  • Masaharu Ohba
    • 1
  1. 1.Faculty of AgricultureMeijo UniversityNagoyaJapan

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