PVTx relationships and solid-liquid equilibria for the m-xylene-p-xylene system under high pressures

Chiaki Yokoyama, Shinobu Moriya, Shinji Takahashi

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

PVTx relationships of the m-xylene-p-xylene system have been measured with a glass piezometer at 283.15 and 298.15 K and pressures up to 200 MPa, or up to the point of solidification of m-xylene where this occurred at a lower pressure. Freezing pressures of m-xylene were observed as a discontinuity in the volume at increasing pressure. Approximate solid-liquid equilibria under high pressures were obtained from the freezing pressure measurement. The Carnahan-Starling-van der Waals (CS-vdW) equation of state was used to correlate the PVTx data. The solid-liquid equilibria under high pressures were calculated with the CS-vdW equation of state for the liquid phase and a simple equation of state for the solid phase. In order to test the validity of the calculation method, the solid-liquid equilibrium relationships of the benzene-cyclohexane system were also calculated. It was found that the solid molar volume should be treated as a function of temperature and/or pressure to fit the experimental data.

Original languageEnglish
Pages (from-to)295-308
Number of pages14
JournalFluid Phase Equilibria
Volume60
Issue number3
DOIs
Publication statusPublished - 1990

ASJC Scopus subject areas

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

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