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Sitompul, J P
Mesin
Mechanical Engineering

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KORELASI KESETIMBANGAN FASA SISTEM CO2-C2H5OH PADA KONDISI SUBKRITIK Sitompul, J P; Widiasa, I N; Samyudia, Y
Mesin Vol 13, No 2 (1998)
Publisher : Mesin

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Abstract

This paper concerns with the correlation of phase equilibrium of binary system of carbon dioxide-ethanol at subcritical and supercritical condition. In this study, three equations of state(Redlich-Kwong, Soave-Redlich-Kwong, and Peng-Robinson) together with conventional mixing rule, were applied for correlating phase equilibrium the system. The capabilities of these equations of state were examined with experiment results obtained from the literatures. The results show that Soave-Redlich-Kwong and Peng-Robinsoh equations of states can well correlate the phase equilibrium of binary system of carbon dioxide-ethanol.
PENGARUH COSOL VENT POLAR PADA KELARUTAN β-KAROTIN DALAM CO2 SUPERKRITIK Sitompul, J P; Wahyudi, H; Widiasa, I N; Suwono, A
Mesin Vol 12, No 3 (1997)
Publisher : Mesin

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Abstract

A simple correlation and prediction of β-carotene in supercritical CO2 involving cosolvents has been developed. Several cubic equations (EOS) and proper mixing rules are employed in correlating available experimental data of solubility fl-carotene in supercritical CO2 involving polar cosolvents. The studies found that strong interaction in the system involving polar cosolvents occurred for which binary interaction parameters should be adjusted for correlating solubility of β-carotene. The strong interaction could be possibly that of solute-solute, solute-cosolvent or cosolvent association. The simple model, however, can predict solubility of β-carotene in that system studied after adjusting binary interaction parameters.
Co-Authors Samyudia, Y Suwono, A Wahyudi, H Widiasa, I N