Determination of the solubility of solid CCl sub 4 in supercritical CF sub 4 subambient temperature

doi:https://doi.org/10.2172/6724622

Determination of the solubility of solid CCl sub 4 in supercritical CF sub 4 subambient temperature

Thomas Barber,P. Bieńkowski,H. D. Cochran-1990-07-01

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TL;DRAbstract

A dynamic experimental apparatus developed for supercritical fluid studies was used to determine the solubility of solid CCl{sub 4} in supercritical CF{sub 4}. An on-line quadrupole mass spectrometer was utilized for analysis of the effluent. The direct coupling of supercritical extraction with mass spectrometry offers a quantitative method for the direct determination of the solute mole fraction in the supercritical fluid. Valid data were obtained for two isotherms at 244K and 249K. Solubilities were found to range from 5.1 {times} 10{sup {minus}4} to 2.58 {times} 10{sup {minus}2} mole fraction. These data will broaden the data base to support the testing of new theoretical models for predicting supercritical behavior. This study successfully correlated the data by two different computational approaches: the compressed gas model and the Kirkwood-Buff fluctuation integral model. As the critical point for CF{sub 4} is 227.6 K, these data are among the few supercritical solubility data a

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A dynamic experimental apparatus developed for supercritical fluid studies was used to determine the solubility of solid CCl{sub 4} in supercritical CF{sub 4}. An on-line quadrupole mass spectrometer was utilized for analysis of the effluent. The direct coupling of supercritical extraction with mass spectrometry offers a quantitative method for the direct determination of the solute mole fraction in the supercritical fluid. Valid data were obtained for two isotherms at 244K and 249K. Solubilities were found to range from 5.1 {times} 10{sup {minus}4} to 2.58 {times} 10{sup {minus}2} mole fraction. These data will broaden the data base to support the testing of new theoretical models for predicting supercritical behavior. This study successfully correlated the data by two different computational approaches: the compressed gas model and the Kirkwood-Buff fluctuation integral model. As the critical point for CF{sub 4} is 227.6 K, these data are among the few supercritical solubility data a

Keywords

Supercritical fluidSolubilitySupercritical fluid extractionMole fractionChemistryMass fractionAnalytical Chemistry (journal)Supercritical fluid chromatography

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