Phase behavior of the carbon dioxide + 1-Dodecanol (cas 112-53-8) system at high pressures

Add time:08/24/2019    Source:sciencedirect.com

Vapor–liquid (VLE), liquid–liquid (LLE), and vapor–liquid–liquid equilibria (VLLE) data for the carbon dioxide + 1-Dodecanol (cas 112-53-8) system at 293.15, 303.15, 313.15, 333.15, and 353.15 K up to 9.36 MPa and phase compositions of the two liquid phases and vapor phase as a function of temperature along the liquid–liquid–vapor (LLV) line are reported. Phase behavior measurements were made in a high-pressure visual cell with variable volume, based on the static-analytic method. The new experimental results are discussed and compared with available literature data. New measured and literature data for carbon dioxide + 1-dodecanol system were modeled with several cubic equations of state (EoS), namely the General Equation of State (GEOS), Peng–Robinson (PR), and Soave–Redlich–Kwong (SRK), using classical van der Waals (two-parameter conventional mixing rule, 2PCMR) mixing rules. A non-cubic hard-sphere perturbed equation of state, CSBM GEOS, was also considered, in order to test its capability to describe the equilibrium phase behavior in systems with molecular asymmetry.

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