Measurement and prediction of phase equilibria for the CO2-ethanol-water system

H. Inomata; K. Arai; S. Saito; S. Ohba; K. Takeuchi

doi:10.1016/0378-3812(89)80069-X

Measurement and prediction of phase equilibria for the CO₂-ethanol-water system

H. Inomata, K. Arai, S. Saito, S. Ohba, K. Takeuchi

ENG - Research Center of Supercritical Fluid Technology

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

In relation to the concentration of ethanol solution from fermentation using near- or super-critical CO₂ extraction, vapor-liquid equilibria for the CO₂-Ethanol-Water system were measured at 9.6, 17.2, 19.6, 25.0 and 32.0 °C up to 9 MPa in the wide range of ethanol concentration, including very dilute region (0.1-5wt%), where no data have been reported. A flow type apparatus equipped with a back pressure regulator was adopted for measurements in order to maintain the feed composition. From our experimental results, we concluded that, 1. 1) There are certain T and P conditions which give a maximum separation factor. 2. 2) In the low concentration region of ethanol, the distribution coefficient of ethanol is about 213 of the value in the higher ethanol concentration region. The measured data were compared with the results predicted by Patel-Teja equation and Group-Contribution equations of state (GC-EOS).

Original language	English
Pages (from-to)	23-30
Number of pages	8
Journal	Fluid Phase Equilibria
Volume	53
Issue number	C
DOIs	https://doi.org/10.1016/0378-3812(89)80069-X
Publication status	Published - 1989 Dec

ASJC Scopus subject areas

Chemical Engineering(all)
Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/0378-3812(89)80069-X

Cite this

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title = "Measurement and prediction of phase equilibria for the CO2-ethanol-water system",

abstract = "In relation to the concentration of ethanol solution from fermentation using near- or super-critical CO2 extraction, vapor-liquid equilibria for the CO2-Ethanol-Water system were measured at 9.6, 17.2, 19.6, 25.0 and 32.0 °C up to 9 MPa in the wide range of ethanol concentration, including very dilute region (0.1-5wt%), where no data have been reported. A flow type apparatus equipped with a back pressure regulator was adopted for measurements in order to maintain the feed composition. From our experimental results, we concluded that, 1. 1) There are certain T and P conditions which give a maximum separation factor. 2. 2) In the low concentration region of ethanol, the distribution coefficient of ethanol is about 213 of the value in the higher ethanol concentration region. The measured data were compared with the results predicted by Patel-Teja equation and Group-Contribution equations of state (GC-EOS).",

author = "H. Inomata and K. Arai and S. Saito and S. Ohba and K. Takeuchi",

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T1 - Measurement and prediction of phase equilibria for the CO2-ethanol-water system

AU - Inomata, H.

AU - Arai, K.

AU - Saito, S.

AU - Ohba, S.

AU - Takeuchi, K.

PY - 1989/12

Y1 - 1989/12

N2 - In relation to the concentration of ethanol solution from fermentation using near- or super-critical CO2 extraction, vapor-liquid equilibria for the CO2-Ethanol-Water system were measured at 9.6, 17.2, 19.6, 25.0 and 32.0 °C up to 9 MPa in the wide range of ethanol concentration, including very dilute region (0.1-5wt%), where no data have been reported. A flow type apparatus equipped with a back pressure regulator was adopted for measurements in order to maintain the feed composition. From our experimental results, we concluded that, 1. 1) There are certain T and P conditions which give a maximum separation factor. 2. 2) In the low concentration region of ethanol, the distribution coefficient of ethanol is about 213 of the value in the higher ethanol concentration region. The measured data were compared with the results predicted by Patel-Teja equation and Group-Contribution equations of state (GC-EOS).

AB - In relation to the concentration of ethanol solution from fermentation using near- or super-critical CO2 extraction, vapor-liquid equilibria for the CO2-Ethanol-Water system were measured at 9.6, 17.2, 19.6, 25.0 and 32.0 °C up to 9 MPa in the wide range of ethanol concentration, including very dilute region (0.1-5wt%), where no data have been reported. A flow type apparatus equipped with a back pressure regulator was adopted for measurements in order to maintain the feed composition. From our experimental results, we concluded that, 1. 1) There are certain T and P conditions which give a maximum separation factor. 2. 2) In the low concentration region of ethanol, the distribution coefficient of ethanol is about 213 of the value in the higher ethanol concentration region. The measured data were compared with the results predicted by Patel-Teja equation and Group-Contribution equations of state (GC-EOS).

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Measurement and prediction of phase equilibria for the CO₂-ethanol-water system

Abstract

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