A study of the volumetric and phase behavior of binary systems. Part I. Critical properties of propane‐perfluorocyclobutane mixtures

Abstract

dation Grant ENG 77-15953 is gratefully acknowledged. We thank the Calgon Corp. for providing activated carbon. after initial heat treatment reacted/(kg of virgin carbon unburned) (s) generation, m2 The volumetric and phase behavior of propane-perfluorocyclobutane mixtures has been determined in the critical region. This system exhibits a minimum temperature point in its critical locus curve and forms a positive critical azeotrope. The measured critical points in this system and their correlation using an extended corresponding states principle are reported in this paper.

Isoplethic Method to Estimate Critical Lines for Binary Fluid Mixtures from Subcritical Vapor−Liquid Equilibrium: Application to the Azeotropic Mixtures R32 + C3H8 and R125 + C3H8

“…A precision estimate for the critical pressure is given as (0.017 Mpa. 4 Estimates for the azeotrope critical-point values are also given in Table 1 …”

Virial coefficients of ethanol from 373.07 to 473.15 K

“…Our cathetometer could be read to ±0.001 cm, with ±0.005-cm accuracy, which limited the accuracy of the volume readings to 0.25% in the smaller tube section and 0.05 % in the larger section. The mass of the sample was determined from the PVT data by adjusting the number of moles so that the Z vs. MV curve extrapolated to unity at zero pressure (8)(9)(10).…”

“…Apparatus. Our PVT apparatus was developed by Kay (7) and has been reported upon in a recent series of papers (8,9). Briefly, a sample of pure ethanol was loaded from a vacuum line into the experimental tube, which is composed of two precision-bore glass tubes of differing diameters.…”

Critical parameters for propane determined by the image analysis

“…The critical parameters were determined by the image analysis [3] of the critical opalescence. Comparisons of the critical parameters with values given in the literature [4][5][6][7][8][9][10][11][12][13] are also reported.…”