Plotting of phase (vapor-liquid) transition surface near the critical point out of data from isochoric experiment. Experimental procedure

Sergey V. Vostrikov*, Andrey A. Pimerzin, Maria E. Konnova, Victoria S. Sarkisova

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

This paper suggests a mathematical model of processing experimental data that allows to plot the surface of the phase transition in near critical region, using the results of isochoric experiment. The model is based on proven approximation methods. The model was tested on 20 binary mixtures (10 mixtures of С27 linear alkanes, five mixtures of propane and branched С56 alkanes, two mixtures of haloalkanes, one mixture each of pentane with toluene, cyclohexane with benzene and toluene) with the difference in critical temperatures from 45 to 235 K. As the result, in the 0.5≤ρDewc < 1.5 range of reduced density the average error in predicting temperatures of phase transition is 2.2 K, 1.2 K for critical temperatures, 3 K for maximum temperature of liquid and vapor phase coexistence.

Original languageEnglish
Pages (from-to)118-129
Number of pages12
JournalFluid Phase Equilibria
Volume462
DOIs
Publication statusPublished - 25 Apr 2018
Externally publishedYes

Keywords

  • Critical density
  • Critical temperature
  • Experimental procedure
  • Liquid and gas phases coexistence
  • Mixture
  • Vapor-liquid equilibrium

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