Naslov
LIQUID-LIQUID EQUILIBRIUM CALCULATIONS FOR POLYMER SOLUTIONS USING GC-FLORY EQUATION OF STATE

Autori
Bogdanić, Grozdana ; Kontogeorgis, M. Georgios

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
XVII. hrvatski skup kemičara i kemijskih inženjera, Sažeci / Zrnčević, Stanka - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI) ; Hrvatsko kemijsko društvo, 2003, 195-195

Skup
XVIII. hrvatski skup kemičara i kemijskih inženjera

Mjesto i datum
Zagreb, Hrvatska, 16.02.2003. - 19.02.2003

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Liqid-liquid equilibria calculation; GC-Flory equation of state; Polymer solutions
(Hrvatsko društvo kemijskih inženjera i tehnologa; Hrvatsko kemijsko društvo)

Sažetak
During the last years, the GC-Flory EOS has been used to calculate activity coefficients in polymer-solvent mixture [1,2,3]3. The GC-Flory EOS using parameters based on vapor-liquid equilibrium (VLE) was also applied to the prediction of the miscibility/immiscibility phenomena of monodisperse polymer-solvent systems [4], but it was shown that the model was capable to predict only qualitatively the phase diagrams typical of LLE of polymer solutions. In principle, LLE compositions may be calculated using any model for Gibbs energy, but models relying on a group contribution approach, such as the UNIFAC model, but they require a special set of parameters [5]. In this work, the model parameters have been estimated from the experimental LLE data. The prediction of LLE phase behavior of polymer solutions with the new LLE parameter tables is significantly improved over the ones obtained using the VLE parameter tables. The comparison of the accuracy of the prediction was carried out, and it was shown that the model was capable quantitatively to predict the most relevant types of phase diagrams typical of LLE of polymer solutions (i.e. phase diagrams of the UCST, LCST, combined UCST and LCST, and "hourglass" types). _________________________________ [1] F.Chen, Aa.Fredenslund, P.Rasmussen, Ind.Eng.Chem.Res., 29, 875 (1990). [2] G.Bogdanić, Aa.Fredenslund, Ind.Eng.Chem.Res., 33, 1331 (1994). [3] G.Bogdanić, Aa.Fredenslund, Ind.Eng.Chem.Res., 34, 324 (1995). [4] A.Saraiva, G.Bogdanić, Aa.Fredenslund, Ind.Eng.Chem.Res., 34, 1835 (1995). [5] T.Magnussen, P.Rasmussen, Aa.Fredenslund, Ind.Eng.Chem.,Proc.Des.Dev., 20, 331 (1981).

Izvorni jezik
Engleski

Znanstvena područja
Kemija

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