Diffusion of acetone in supercritical carbon dioxide

Nishiumi, Hideo; Fujita, Minoru; Agou, Kenichi

doi:10.1016/0378-3812(95)02972-9

Cited by 58 publications

(52 citation statements)

References 3 publications

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“…The diffusion coefficients at 308.2 K near the critical pressure of carbon dioxide decrease as shown in Fig.1. The similar phenomena of diffusion coefficients decrease for acetone and naphthalene in supercritical carbon dioxide were reported by Nishiumi et al [2] and Tsekhanskaya [3], respectively. However, the Taylor method used by Nishiumi et al [2] could not show the experimental concentration and the data of Tsekhanskaya [3] are so small in the wide pressure range.…”

Section: Resultssupporting

confidence: 85%

“…The similar phenomena of diffusion coefficients decrease for acetone and naphthalene in supercritical carbon dioxide were reported by Nishiumi et al [2] and Tsekhanskaya [3], respectively. However, the Taylor method used by Nishiumi et al [2] could not show the experimental concentration and the data of Tsekhanskaya [3] are so small in the wide pressure range. The diffusion coefficients of dimethylnaphthalene isomers are about 10 % lower than those of naphthalene as shown in Fig.3.…”

Section: Resultssupporting

confidence: 85%

“…Nishiumi et al [2] measured the diffusion coefficients of acetone in supercritical carbon dioxide by the Taylor-Aris method. They showed the diffusion coefficients sharply decrease near the critical point of carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

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Correlation of diffusion coefficients for naphthalene and dimethylnaphthalene isomers in supercritical carbon dioxide

Higashi

Iwai

Nakamura

et al. 1999

Fluid Phase Equilibria

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An equation proposed by Darken, including the thermodynamic factor and tracer diffusion coefficients of solvent and solute, was adopted to correlate the diffusion coefficients for naphthalene and dimethylnaphthalene isomers in supercritical carbon dioxide and the correlated results were compared with the experimental data. IML equation of state with mixing rules and combining rules containing two adjustable interaction parameters were used for calculation of the thermodynamic factor. By using the interaction parameters adjusted to the solubility data, the concentration dependence of diffusion coefficients and their anomaly near the critical point of carbon dioxide can be quantitatively represented. In order to improve the reliability of experimental results, some re-measured diffusion coefficient data for naphthalene, 2,6-and 2,7-dimethylnaphthalene at 308.2 K, and new data for naphthalene at 318.2 K and for 2,3-dimethylnaphthalene at 308.2 K are presented.2

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Section: Resultssupporting

confidence: 85%

Section: Resultssupporting

confidence: 85%

See 1 more Smart Citation

Correlation of diffusion coefficients for naphthalene and dimethylnaphthalene isomers in supercritical carbon dioxide

Higashi

Iwai

Nakamura

et al. 1999

Fluid Phase Equilibria

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show abstract

“…This effect is attributed to a shift of the distribution of local densities just below the critical density to one of higher mean local densities and is compared to apparently similar anomalies in certain experimental results. 5,6 The experimental papers cited contain measurements of a different quantity, the tracer diffusion coefficients (D Ti ) of various solutes 5,6 in supercritical CO 2 . There are three diffusion coefficients characteristic of a binary mixture: two intradiffusion coefficients (D i *) describing thermal motion of the components, and a mutual or interdiffusion coefficient (D 12 ) describing mixing.…”

mentioning

confidence: 99%

“…One set of measurements 6 cited by Drozdov and Tucker was carried out by the Taylor method. 9,12 The nature of the technique, which employs fluid flow, is such that near a solvent critical point or a mixture consolute point the anomalous increase in the solution viscosity coupled with the divergence in the compressibility totally negates the va-lidity of the method.…”

mentioning

confidence: 99%