US EPA

1119339 

Journal Article 

Solubility of CF4 in lower alcohols 

Sousa, JMMV; Ferreira, AGM; Fachada, HC; Fonseca, IMA 

2010 

Yes 

Fluid Phase Equilibria
ISSN: 0378-3812 

ELSEVIER SCIENCE BV 

AMSTERDAM 

296 

2 

95-98 

10.1016/j.fluid.2010.02.007 

WOS:000281095700005 

This work is inserted in a research program that consists mainly in the experimental and theoretical study of the effect of association/solvation between solute and solvent molecules in the solubility of gases in liquids. The solubilities of tetrafluoromethane in lower alcohols (methanol, ethanol, 1-propanol, 1-butanol) have been determined in the temperature range of 288-308 K, at atmospheric pressure, using an automated apparatus recently assembled in our laboratory. An accuracy of 0.6% and a precision of the same order of magnitude was achieved. The solubility is the lowest in methanol which is the highest associated alcohol and increases with the C-content of the alcohol. The molar Gibbs energy, enthalpy and entropy of solution were calculated from the experimental results (at 1 atm partial pressure of the gas and 298 K). A semiempirical correlation between the solubility of CF4 in alcohols at 298 K and the Gutmann acceptor number (AN) of the solvents has been developed. (C) 2010 Elsevier B.V. All rights reserved. 

G/L solubility; Tetrafluoromethane; Alcohols; Association; Acceptor number 

8th Ibero-American Conference on Phase Equilibria and Fluid Properties for Process Design 

Algarve, PORTUGAL