Molecular diffusion coefficients of vitamin K3 in mixtures of CO2 and n-hexane at temperature of 313.2K and total pressure of 16.0 MPa.

Funazukuri, Toshitaka; Ishiwata, Yoshihisa; Wakao, Noriaki

doi:10.1252/jcej.24.387

Cited by 12 publications

(5 citation statements)

References 3 publications

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“…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.…”

Section: Measurements Of Pseudo Binary Diffusion Coefficientsmentioning

confidence: 99%

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Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

Funazukuri

Kong

Kagei

2004

Journal of Chromatography A

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Section: Measurements Of Pseudo Binary Diffusion Coefficientsmentioning

confidence: 99%

“…(4) In other supercritical fluids by the Taylor dispersion method [86][87][88][89][90]. (5) In a dense fluid mixture by the Taylor dispersion method [30,[55][56][57][58][59][60][61][62][63]. (6) In dense carbon dioxide with micelle-forming surfactant and water [85] (7) From solid dissolution rates in supercritical fluids [1,2,91,92].…”

Section: Data Sourcesmentioning

confidence: 99%

Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

Funazukuri

Kong

Kagei

2004

Journal of Chromatography A

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“…Tilly et al report having measured them in supercritical CO 2 + 5% mole fraction of ethanol, but neither figures nor tables are provided. Tilly et al only said that Chung's method 24 is the best to estimate viscosities, coinciding with Funazukuri, , who employed the same method for the CO 2 + hexane system and with Souvignet and Olesik 15 for the ternary system ethanol + CO 2 + H 2 O. In this study, Chung's formulas were also used, except for pure solvents, with available viscosities. , …”

Section: Resultsmentioning

confidence: 82%

“…Funazukuri , and Olesik , employed the Wilke−Chang equation to estimate the diffusion coefficient of a dilute solute in a mixture of solvents (one of these being carbon dioxide) because this empirical correlation is very simple and requires only the viscosity of the mixture. However, there exist more equations that could be applied to the systems CO 2 + entrainer, although these need more information than the Wilke−Chang formula.…”

Section: Introductionmentioning

confidence: 99%

Diffusion of Benzyl Acetate, 2-Phenylethyl Acetate, 3-Phenylpropyl Acetate, and Dibenzyl Ether in Mixtures of Carbon Dioxide and Ethanol

Suárez-Iglesias

Medina

Pizarro

et al. 2007

Ind. Eng. Chem. Res.

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Diffusion coefficients of four solutes at infinite dilution (benzyl acetate, 2-phenylethyl acetate, 3-phenylpropyl acetate, and dibenzyl ether) were measured in the system CO 2 + ethanol from 313.16 to 333.16 K and pressures between 15 and 35 MPa over the full concentration range of the CO 2 + ethanol mixture. The diffusional behavior in the mixed solvent was compared with the estimation of seven simple predictive equations, Le Blanc, Wilke-Chang, Holmes-Olander-Wilke, Tang-Himmelblau (two formulas), Perkins-Geankoplis, and Leffler-Cullinam, observing that the first two give errors between 17 and 30% and that deviations lower than 11% are only obtained with the expressions of Tang-Himmelblau. Nevertheless, as none of the studied equations considers the self-association of ethanol nor complex formation between solute and alcohol molecules, the model of Lusis-Ratcliff and Mohan-Srnivasan was extended to a ternary liquid-supercritical system with the diffusing component dilute, obtaining average absolute deviations lower than 4.6% for the diffusivities of the four solutes. Nevertheless, the extension of this model is correlative (it needs one adjustable parameter for each solute), not predictive.

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“…Diffusion coefficient data for biomaterial(s)/SC-CO 2 systems have been collected. − Most of them have been measured with the chromatographic peak broadening (CPB) technique, which provides values at infinite dilution. However, supercritical fluid separation processes often operate at finite, even high, concentrations for complex mixtures.…”

Section: Introductionmentioning

confidence: 99%

Concentration Dependence of the Diffusion Coefficient of Lipid in Supercritical Carbon Dioxide

Tuan

Zollweg

Rizvi

1999

Ind. Eng. Chem. Res.

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The concentration dependence of diffusion coefficients for methyl oleate (MO) and anhydrous milk fat (AMF) in supercritical carbon dioxide (SC-CO 2 ) at 40°C and various pressures was measured in these two-phase systems by a steady-state method. The applicability of Schreiner's type equations, which are based on the chemical potential driving force, was evaluated for these systems. The thermodynamic factor for each solute was determined from the Peng-Robinson equation of state. For MO, Schreiner's type equations represented its diffusion adequately. The equations with viscosity correction were better than those without it. However, this approach was not successful for the AMF/SC-CO 2 system when AMF was considered as a pseudopure component.

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Molecular diffusion coefficients of vitamin K3 in mixtures of CO2 and n-hexane at temperature of 313.2K and total pressure of 16.0 MPa.

Cited by 12 publications

References 3 publications

Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

Impulse response techniques to measure binary diffusion coefficients under supercritical conditions

Diffusion of Benzyl Acetate, 2-Phenylethyl Acetate, 3-Phenylpropyl Acetate, and Dibenzyl Ether in Mixtures of Carbon Dioxide and Ethanol

Concentration Dependence of the Diffusion Coefficient of Lipid in Supercritical Carbon Dioxide

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