Correlation of High Pressure Density Behaviors for Fluid Mixtures made of Carbon Dioxide with Solvent at 313.15 K

Abstract

High pressure density behaviors for fluid mixtures made of carbon dioxide with solvent, methyl acetate, ethyl acetate, 2-propyl acetate, methanol, 1-propanol, or 2-propanol, at 313.15 K were satisfactorily correlated. The standard deviations were between 0.4 and 2.2 kg m -3 in density for each system in the composition range from 0.00 to 0.95 mole fraction of carbon dioxide.

Density, Viscosity, and CO2 Solubility of a Deep Eutectic Solvent Comprising Choline Chloride and Ethylene Glycol

“…The AARDs of EG and ChCl2EG are 0.02 and 0.10%, respectively. The density-correlated equation was compared to the Tait-type equation (eq 9) by Kato et al 40 The coefficients of the best fit for the Tait-type equation (eq 9) and the AARD are listed in Table 10. The percent relative deviations of a newly developed density-correlated (eq 8) or the Tait-type equation (eq 9) are shown in Figure 7.…”

“…The developed density-correlated equation (eq ) was compared with the Tait-type equation (eq ) of Kato et al ρ normalL = ρ 1 * x 1 + ρ 2 * x 2 + α x 1 x 2 { x 1 + β x 2 x 1 − κ x 1 x 2 + λ x 2 } 1 − ln { 1 − 1 − false( p / p * false) 1 + exp false[ A ′ − B ′ / ( x 1 + 6 x 2 ) false] } where x 1 and x 2 are the mole fractions of CO 2 and EG or ChCl2EG, respectively, and ρ 1 * and ρ 2 * are the densities of CO 2 and EG or ChCl2EG at the reference pressure p * (10 MPa). p is the pressure and α, β, κ, λ, A ′, and B ′ are the fitting parameters.…”

“…Recently, the Tait-type densitycorrelated equation with eight parameters independent of pressure and composition (mole fraction of CO 2 , x 1 ) was proposed by Kato et al 39 (valid composition range: x 1 = 0−0.8). The Tait-type density-correlated equation was further improved to six parameters by Kato et al 40 (valid composition range: x 1 = 0−0.95). However, the equation of Kato et al 40 requires the parameters to be determined for each temperature.…”

“…The Tait-type density-correlated equation was further improved to six parameters by Kato et al 40 (valid composition range: x 1 = 0−0.95). However, the equation of Kato et al 40 requires the parameters to be determined for each temperature. Therefore, a density-correlated equation with pressure−temperature−composition-independent parameters is required to correlate the experimental data at several temperatures.…”

Chemometric evaluation of the combined effect of temperature, pressure, and co-solvent fractions on the chiral separation of basic pharmaceuticals using actual vs set operational conditions

“…The volumetric flow rate through the column was calculated using the measured total mass flow and the mixture density [4]. To calculate the methanol volume fraction, the molar volumes of carbon dioxide and methanol [4] were numerically calculated [33] as further explained by Kodama et al [34].…”