Fluid mixtures at high pressures: Phase behavior and critical phenomena for binary mixtures of water with aromatic hydrocarbons

Impact of non-ideality on mixing of hydrocarbons and water at supercritical or near-critical conditions

“…UCST of binary HC-water systems at 24MPa for HC species used in this study. Measured data are from [28,31]. Note that n-C 10 , n-C 16 , and n-C 30 represent n-decane, n-hexadecane, and n-triacontane, respectively.…”

Properties of Mixtures with Water

“…Water-biphenyl [31] Water-naphthalene [32] Water-tetrahydronaphthalene [33] Nonaqueous systems: n-Octane-carbon dioxide Type III: systems with a divided gas-liquid critical curve. Both legs start at the critical point of one of the components.…”

“…Such a phase behavior can be expected for high-molecular-weight hydrocarbons with critical temperatures substantially higher than that of water. The reason is that the density of the organic liquid remains relatively constant while the density of the aqueous liquid decreases significantly near the critical temperature of water [33].…”

“…Water-trans-decalin Water-benzene Water-methyl-substituted benzenes (toluene, o-xylene, p-xylene, and 1,3,5-trimethylbenzene) [33] Type IV: systems with three critical curves according to Figure 3.8f. The third critical curve begins at the critical point of the component with the higher critical temperature and ends at the critical endpoint of the three-phase line.…”

“…For mixtures of water and aromatic compounds, a similar study to the behavior of n-alkane-water systems provides information on higher-molecularweight hydrocarbons, mostly aromatic character, from benzene to pyrene [33].…”