TY - GEN
T1 - Volumetric behavior of water-alcohol mixture at 673.15 K under high pressures. I. Methanol and ethanol solutions
AU - Hoshina, Taka Aki
AU - Ono, Takumi
AU - Aida, Tsutomu
AU - Matsushita, Takashi
AU - Watanabe, Masaru
AU - Sato, Yoshiyuki
AU - Smith, Richard Lee Jr.
AU - Inomata, Hiroshi
PY - 2006/12/1
Y1 - 2006/12/1
N2 - The densities of water-methanol and water-ethanol mixtures were measured at 673.15 K and 25-40 MPa and the excess molar volumes VmE and fitted VmE were estimated with the Redlich-Kister equation. The concentration dependence of VmE gave the positive deviations from the ideal solution at all the experimental conditions. The concerted effects, the dispersion of water molecules around the hydrophobic group of alcohol molecule, and compression effect, may give the maximum around 30-40 mole % of alcohol concentration and 30 MPa for the excess molar volumes at 673.15 K. The comparison V VmE between methanol and ethanol aqueous solutions indicated that the magnitude of water?methanol interactions were larger than that of ethanol solutions at 30?35 MPa and 673.15 K. The effect of thermal motions of molecules was significant at 25 MPa and compression effect became dominant at 40 MPa on the volume change of solutions at 673.15 K. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).
AB - The densities of water-methanol and water-ethanol mixtures were measured at 673.15 K and 25-40 MPa and the excess molar volumes VmE and fitted VmE were estimated with the Redlich-Kister equation. The concentration dependence of VmE gave the positive deviations from the ideal solution at all the experimental conditions. The concerted effects, the dispersion of water molecules around the hydrophobic group of alcohol molecule, and compression effect, may give the maximum around 30-40 mole % of alcohol concentration and 30 MPa for the excess molar volumes at 673.15 K. The comparison V VmE between methanol and ethanol aqueous solutions indicated that the magnitude of water?methanol interactions were larger than that of ethanol solutions at 30?35 MPa and 673.15 K. The effect of thermal motions of molecules was significant at 25 MPa and compression effect became dominant at 40 MPa on the volume change of solutions at 673.15 K. This is an abstract of a paper presented at the AIChE Annual Meeting (San Francisco, CA 11/12-17/2006).
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M3 - Conference contribution
AN - SCOPUS:58049104608
SN - 081691012X
SN - 9780816910120
T3 - AIChE Annual Meeting, Conference Proceedings
BT - 2006 AIChE Annual Meeting
T2 - 2006 AIChE Annual Meeting
Y2 - 12 November 2006 through 17 November 2006
ER -