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Fluid phase equilibria for the CO2 + 2,3-dimethylbutane binary system from 291.9 K to 373.1 K

Abstract : The phase behavior of the CO2 (1) + 2,3-dimethylbutane (2) binary mixture has been experimentally studied between 293 and 373 K. Saturation pressures, ranging from 14.0 to 112.2 bar, were visually measured using a high-pressure cell at carbon dioxide mole fractions between 0.20 and 0.93. 78 experimental points have been measured: 67 bubble points and 11 dew points. Experimental results reveal that the vapor-liquid critical locus is a continuous curve between the two pure compounds, meaning that the studied binary system exhibits a type I or II phase behavior in the classification scheme of Van Konynenburg and Scott. The experimental data can be very satisfactorily represented by the Peng-Robinson equation of state with mixing rules that embed a temperature-dependent binary interaction parameter.
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https://hal.archives-ouvertes.fr/hal-03347858
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Submitted on : Tuesday, September 21, 2021 - 10:02:57 AM
Last modification on : Tuesday, October 19, 2021 - 3:40:41 PM

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Sarra Zid, Jean-Patrick Bazile, Jean-Luc Daridon, Andrés Piña-Martinez, Jean-Noël Jaubert, et al.. Fluid phase equilibria for the CO2 + 2,3-dimethylbutane binary system from 291.9 K to 373.1 K. Journal of Supercritical Fluids, Elsevier, 2021, 179, pp.105387. ⟨10.1016/j.supflu.2021.105387⟩. ⟨hal-03347858⟩

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