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Fluid-phase and crystallization equilibria of (dimethylether  +  nitrogen, or argon, or krypton, or xenon) at temperatures fromT =  (270 to 110) K and at pressures up to 200 MPa

✍ Scribed by Axel Wallbruch; Holger Thiel; Gerhard M. Schneider

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
240 KB
Volume
32
Category
Article
ISSN
0021-9614

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✦ Synopsis

The phase behaviour of binary mixtures of dimethyl ether with nitrogen, or argon, or krypton, or xenon as the second non-polar component has been investigated at temperatures from T = (270 to 110) K and at pressures up to 200 MPa. The measurements were performed in an optical high-pressure cell, fitted with sapphire windows and a magnetic stirrer. The compositions were determined by on-line gas chromatography. Phase separation was observed according to the synthetic method. The measured p(T ) isopleths and the interpolated T (x) isobars are presented and discussed. In the classification of van Konynenburg and Scott, the phase behaviour of (dimethyl ether + nitrogen) and (dimethyl ether + argon) corresponds to type III, (dimethyl ether + krypton) to type II, and (dimethyl ether + xenon) to type I (being close to a type II system). In (dimethyl ether + krypton) a quadruple point (solid + solid + fluid + fluid) occurs at about T = 133 K and p = 70 MPa.

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