Application of a generalized multiproperty apparatus to measure phase equilibrium and vapor phase densities of supercritical carbon dioxide in n-hexadecane systems up to 26 MPa

Phase behaviour of binary systems of lactones in carbon dioxide

“…Figures 1 to 4 present the pressure-composition diagrams for the binary systems studied where one can see that when the temperature is increased above the solvent critical temperature (313 to 343) K, only vapour-liquid transitions were observed for all systems. Such transition curves are commonly observed in CO 2 systems with high molecular asymmetry between the compounds [27,28], which seems to be the case for the systems studied. According to the classification of van Konynenburg and Scott [28], the phase behaviour of the binary systems studied in this work may be classified as type V, which is also found in binary systems containing alcohols, like ethylene-methanol [29].…”

High-pressure phase equilibrium data for systems with carbon dioxide, α-humulene and trans-caryophyllene

“…When the temperature is increased above the critical temperature of the solvent (313 to 343) K, only vapour-liquid transitions were observed. Such transition curves are commonly observed in CO 2 systems with high molecular asymmetry between the compounds [22,23], which seems to be the case for the systems studied. The large differences between the chemical natures of the constituents in these fluids may be the reason for the complex phase behaviour (LLE and VLLE).…”

High-Pressure Fluid Phase Equilibria

“…Charoensombut-Amon et al measured CO2 n-C12 data in the temperature and pressure range of this work (Charoensombut-Amon et al, 1986). However, it is suspected that there may be some type of typographical error in some of the data tables, published in the referenced article, since even on first inspection some of the data appears to exhibit unrealistic trends.…”

“…With alkanes, the heptane CO2 system, is the first alkane CO2 system that system displays liquid-liquid immiscibility (Charoensombut-Amon et al, 1986;McHugh, 1994). The type II behaviour continues for the various CO2 -n-alkane systems up to n-C12 (Elliott & Lira, 1999).…”