Diffusion coefficients of linoleic acid methyl ester, Vitamin K3 and indole in mixtures of carbon dioxide and n-hexane at 313.2 K, and 16.0 MPa and 25.0 MPa

Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

“…(39) with a single set of values of α and β is valid for a specific solute in supercritical carbon dioxide and organic solvents, as shown in Fig. 20 [59]. Note that the D 1m values in a mixture solvent of carbon dioxide and hexane deviated because of uncertainty in the estimated viscosity of the mixture by the method of Chung et al (described in ref.…”

“…The pseudo binary diffusion coefficients have been measured by the Taylor dispersion method [30,[55][56][57][58][59][60][61][62][63]. The design of the experimental apparatus for a mixture of solvents is essentially identical.…”

“…The design of the experimental apparatus for a mixture of solvents is essentially identical. Funazukuri and Ishiwata [59] measured the pseudo binary diffusion coefficient D 1m of linoleic acid methyl ester, indole, and Vitamin K 3 at 313 K in a mixture of carbon dioxide and hexane over the entire range of hexane mole fractions from zero to 1. The D 1m values decrease with increasing hexane mole fraction, as shown in Fig.…”

“…(38), called Blanc's equation, and the D 1m -viscosity correlation expressed as Eq. (39) are more representative of conventional correlations [59]. [51], and D 12 in organic solvents [64]; n-hexane (), n-dodecane (᭡), and cyclohexane (᭜).…”

“…After ref. [59]. (38) where x 2 , and x 3 are mole fractions of carbon dioxide and hexane, respectively, and D 12 and D 13 are binary diffusion coefficients of a solute in carbon dioxide and in hexane, respectively, at the same temperature and pressure.…”