Artigo de Periódico
Solubility of solids in supercritical fluids using equations of state — excess Gibbs free energy models
Fecha
1996Registro en:
0921-8610
v. 12
Autor
Verotti Filho, C.
Costa, Glória Meyberg Nunes
Verotti Filho, C.
Costa, Glória Meyberg Nunes
Institución
Resumen
Solubilities of several organic solids in four supercritical fluids are calculated with Soave and Peng-Robinson equations of state, incorporating excess Gibbs free energy into the mixing rules, with Heidemann-Kokal, Wong-Sandler and MHV2 procedures. Three excess Gibbs free energy models are used in the mixing rules: NRTL, UNiQUAC and UNIFAC. Furthermore, a comparison between these mixing rules and conventional two-binary-parameter form and modification of the excluded volume parameter in the MHV2 procedure is also presented. The best result were obtained with NRTL model and the Wong-Sandler mixing rule.