Inverse gas chromatography. Relationship between mass activity coefficient and flory-huggins interaction parameter in the examination of petroleum pitches

Abstract

SummaryThe use of the basic relations for the calculation of the weight fraction activity coefficient ~]~ and the FloryHuggins interaction parameter )CT2 requires the knowledge of the density and the molecular mass of the stationary phase. As these data are often inaccessible the use of a simplified equation is examined. The errors generated during the calculation of ~z and solubility parameter 5 2 are presented and discussed. All experimental data were collected for the series of fractions separated from high-boiling vacuum distillation residues of petroleum.

Measurement of activity coefficients at infinite dilution in 1-hexadecyl-3-methylimidazolium tetrafluoroborate ionic liquid

“…According to the Flory-Huggins theory, the interaction parameter v which characterizes interactions between the solute and the stationary phase may be determined using the following expression [35][36][37]:…”

Application of inverse gas chromatography in physicochemical characterization of phenolic resin adhesives

“…At infinite dilution of the probe and for high molecular weight of the stationary phase the Flory-Huggins interaction parameter can be determined from [15][16][17][18]:…”

The use of solubility parameters in characterization of titanate modified silica gel by inverse gas chromatography

“…(3). This problem of the use of such procedure had been discussed earlier [9]. One may expect a relatively low error in the estimation of the solubility parameter.…”