What is the state of aggregation of ethanol molecules in ethanol-supercritical carbon dioxide mixtures? An FTIR investigation in the full molar fraction range

被引：8

作者：

Lafrad, Fatima ^{[1
,2
,3
]}

Idrissi, Abdenacer ^{[1
,2
]}

Tassaing, Thierry ^{[3
]}

机构：

[1] Lab Spectrochim Infrarouge, F-59655 Villeneuve Dascq, France

[2] Univ Lille 1, UMR CNRS 8516, F-59655 Villeneuve Dascq, France

[3] Univ Bordeaux, UMR CNRS 5255, Inst Mol Sci, F-33405 Talence, France

来源：

JOURNAL OF SUPERCRITICAL FLUIDS | 2014年 / 94卷

关键词：

Supercritical CO2; Ethanol; Hydrogen bonding; Solvation; Near infrared spectra; INFRARED-SPECTROSCOPY; CO2-ETHANOL MIXTURES; PLUS ETHANOL; LIQUID; CO2; IR; SOLUBILITY; METHANOL; DENSITY; ACETONE;

D O I：

10.1016/j.supflu.2014.06.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The evolution of the degree of hydrogen bonding of ethanol molecules in scCO(2)-ethanol mixtures for different molar fraction (from 0.5 to 100% in ethanol) in the temperature range 40-200 degrees C and at two different constant pressures P=15 and 20 MPa is reported in this paper. For a given pressure, we observe a strong dependence of the degree of hydrogen bonding as a function of temperature and ethanol molar fraction. We emphasize that a detailed knowledge of the degree of hydrogen bonding of ethanol molecules in these binary systems is important for the understanding and the further development of the supercritical fluid technology. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：65 / 70

页数：6

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