MEASUREMENT AND CORRELATION OF INFINITE DILUTION ACTIVITY COEFFICIENTS OF AROMATIC COMPOUND IN WATER
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Accession number;07A0043233
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| Title;MEASUREMENT AND CORRELATION OF INFINITE DILUTION ACTIVITY COEFFICIENTS OF AROMATIC COMPOUND IN WATER |
| Author;
FUKUCHI KENJI
(Ube National Coll. Technol., JPN)
MIYOSHI KATSUMI
(Ube National Coll. Technol., JPN)
KOBUCHI SHIGETOSHI
(Yamaguchi Univ., Graduate School, JPN)
YONEZAWA SETSUKO
(Kyushu Univ., Graduate School, JPN)
ARAI YASUHIKO
(Kyushu Univ., Graduate School, JPN)
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Journal Title;Thermophys Prop
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Journal Code:X0031A
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ISSN:0911-1743
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VOL.27th;NO.;PAGE.92-94(2006)
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| Figure&Table&Reference;FIG.2, REF.15 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;A volatility for the very small amount of toxic substance in waste water becomes a problem as air pollution in an environmental subject. The properties of vapor pressure and activity coefficient are indispensability to grasp this volatility quantitatively. Vapor pressure of pure substance as basic properties of matter is carried by chemical manuals, but a value of an activity coefficient has few data, and it is the present conditions that there is not estimation method. The accurate design of separation processes requires the knowledge of phase equilibrium behavior. Correlation and prediction of vapor-liquid equilibria (VLE) are usually performed by using activity coefficients for liquid phase. In our previous studies, the infinite dilution activity coefficients were measured for alkanol in alkane, ether in alkane, ether in alkanol, bis(2,2,2-trifluoroethyl) ether in dodecane or alkanol, alkanols or ethers in aqueous solutions. In this study, the infinite dilution activity coefficients of aromatic compounds (benzene, toluene, p-xylene) in water were measured at 293.15-313.15K using a gas stripping method. Previously the Flory-Huggins (FH) part of ASOG was examined by using the infinite dilution activity coefficient data of n-alkane binary mixtures and an empirical equation is proposed to evaluate the entropy of mixing (FH) term. The group-interaction (G) part of ASOG was improved by introducing the contact probability between groups to give a good correlation for the infinite dilution activity coefficients of 1- and 2-alkanols in alkanes, ethers in alkanes or alkanols, bis(2,2,2-trifluoroethyl) ether in dodecane or alkanol, alkanols or ethers in aqueous solutions and fluoroethers in dodecane. In this study, the modified ASOG was applied to correlate the infinite dilution activity coefficients of aromatic compounds in water. (author abst.) |
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