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High-pressure phase equilibria of {(1−x)CH4+xCH3(CH2)18CH3}

✍ Scribed by H.J. van der Kooi; E. Flöter; Th.W.de Loos

Book ID: 102968854
Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 587 KB
Volume: 27
Category: Article
ISSN: 0021-9614
DOI: 10.1006/jcht.1995.0089

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✦ Synopsis

Experimental results for the various phase equilibria of {(1x)CH4 + xCH3(CH2)18CH3} are presented. (Vapour + liquid) equilibria were measured for 26 different mixtures covering almost the whole composition range. The temperature varied between 303 K and 370 K. (Solid + liquid) and (solid + vapour) equilibrium measurements were performed for 20 different mixtures. The pressures applied did not exceed 100 MPa. On the basis of the primary experimental two-phase equilibrium results, the course of the three-phase curve (solid eicosane+liquid+vapour) could be derived. The second critical endpoint, where solid eicosane is in equilibrium with a critical fluid phase (sC20 + l=g), was found at a temperature T = (307.37 2 0.15) K, a pressure p = (89.0 2 0.25) MPa, and a mole fraction in the critical fluid phase of x=(0.04920.0012).

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