Fluid phase equilibria of (carbon dioxide + a 1-alkanol+ an alkane) up to 100 MPa andT=393 K: cosolvency effect, miscibility windows, and holes in the critical surface

High pressure phase behaviour of the CO2+1-decanol+n-dodecane system

“…A cosolvent system is one where the solubility of an X-Y mixture in solvent Z is higher than that of either pure X in Z or pure Y in Z [8,23]. Cosolvency is a common occurrence amongst (CO2 + 1-alkanol + alkane)-systems [23].…”

“…Cosolvency is a common occurrence amongst (CO2 + 1-alkanol + alkane)-systems [23]. In order to observe the cosolvency effect, the solubility pressures for Mixtures A and B were plotted alongside that of the pure n-dodecane system in Figure 3.…”

The application of a shear mode piezoelectric sensor to monitoring the high-pressure phase behaviour of asymmetric binary systems

“…Luks and co-workers [54] have found that the process of the phase separation can be significantly slower than in usual biphasic systems after agitation in the equilibrium cell because the densities are very similar for the two liquid phases close to the barotropic point. Also Scheidgen and Schneider [55] have pointed out that accurate sampling is difficult at low temperatures and high pressures due to the occurrence of barotropy.…”

“…Luks and co-workers [54] studied the LLV equilibrium using a stoichiometric technique and temperature, pressure, phase compositions and molar volumes of the two coexisting liquid phases were reported. Recently, Scheidgen and Schneider [55] reported the measurements on critical solution points up to 393 K and 100 MPa using an analytical method with sampling.…”

The continuity and family concepts: Useful tools in fluid phase science

“…4 and 5 is related to a new rapid measuring technique developed for these experiments. 19,25,32 Figs. 4 and 5 demonstrate a striking similarity of these two families with respect to their critical phase behaviour.…”