Phase equilibria and thermophysical properties of carbon dioxide-expanded fluorinated solvents

Controlling phase behaviour on gas expansion of fluid mixtures

“…Sassiat et al 14 reported that diffusion coefficients for benzene in CO 2 -expanded methanol showed a four-fold increase on expansion with CO 2 . Similar expansions have been experienced by Kho et al 15 who noticed a decrease of four-fold in solvent viscosities of CO 2 -expanded fluorinated solvents. In the preceding paper, in a detailed study of some of the physical properties of organic solvents expanded with CO 2 , we have shown that liquid density, solubility strength, and both local and bulk polarity properties can be tuned.…”

“…'Expected' densities are also included; these are determined by taking an average of the density values for the pure components. Expected densities for the expanded systems are taken from an average of the expanded density values determined for expanded solvents with published data 15 Density at Ambient Pressure/g cm -3 Density at 50 bar CO 2 /g cm 7), b will be positive and under the conditions in Table 1 this is sufficient to make D mix G positive such that the equilibrium tends to the two separate phases, toluene + CO 2 and methanol + CO 2 .…”

Probing the structure of gas expanded liquids using relative permittivity, density and polarity measurements

“…This explains why the viscosities of these systems have been shown to be considerably lower than the corresponding unexpanded liquids. [31][32][33] This also shows that in terms of the free volume, all of these systems expand with the exception of DCM where the CO 2 fills the void volume rather than expanding the liquid lattice.…”

PROperties of FIre Suppressant SYstems “PROFISSY” A Spreadsheet Application for Fire-Suppressant Bottle-Filling Calculations

“…Based on comparisons with this data set, the estimated uncertainty for liquid phase speed of sound is 0.7 % for temperatures from 283 K to 323 K, and pressures up to 100 MPa. Figures A20 and A21 show the deviations between experimental viscosity data [82,87,88] and the model developed in this work. The models for viscosity and thermal conductivity are based on extended corresponding states (ECS) and are described in Ref.…”