A. Wesch et al., MEASURING THE STATIC DIELECTRIC-CONSTANTS OF PURE CARBON-DIOXIDE AND CARBON-DIOXIDE MIXED WITH ETHANOL AND TOLUENE AT ELEVATED PRESSURES, Berichte der Bunsengesellschaft fur Physikalische Chemie, 100(8), 1996, pp. 1368-1371
Citations number
18
Categorie Soggetti
Chemistry Physical
Journal title
Berichte der Bunsengesellschaft fur Physikalische Chemie
Static dielectric constants (relative permittivities) of binary carbon
dioxide/ethanol mixtures and carbon dioxide/toluene mixtures of vario
us compositions at 10 MPa and 313 K, which were experimentally determi
ned, are presented. In addition, the dielectric constant of pure carbo
n dioxide was measured at temperatures of 293,313 and 336 K in the pre
ssure range of up to 30 MPa. The measurements were conducted with a ne
w type of sensor design. The dielectric constant of pure carbon dioxid
e shows a pronounced dependence on pressure close to the critical pres
sure. There is a nearly linear relationship between density and the di
electric constant. The dielectrical behavior of the mixtures of superc
ritical carbon dioxide with ethanol and toluene is qualitatively very
similar to that of liquid benzene/ethanol and benzene/toluene mixtures
at normal pressure.