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Critical (p , ρ , T) properties of CH2F2, {xCO2+(1 − x) SF6}, {xSF6+(1 − x) CH2F2}, and {xCHF3+(1 − x) CH2F2}

✍ Scribed by A. Diefenbacher; M. Türk

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
328 KB
Volume
31
Category
Article
ISSN
0021-9614

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✦ Synopsis

Measurements of the critical pressure p c , density ρ c , and temperature T c of the pure substance CH 2 F 2 as well as {xCO 2 + (1x)SF 6 }, {xSF 6 + (1x)CH 2 F 2 }, and {xCHF 3 + (1x)CH 2 F 2 } were performed by observing the critical opalescence in a static equilibrium cell. When possible, the experimental data were compared with values given in the literature. The experimental results for the binary mixtures are described by the Peng-Robinson and the Trebble-Bishnoi-Salim equations of state, using only the experimental critical data of the pure components and those of a mixture with x ≈ 0.5. The equations of state are used to describe the critical loci, the dependence of the supercritical density on temperature and composition, and the excess volume of the binary systems investigated.

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