Naslov
Vapor–liquid equilibrium in diluted polymer + toluene systems

Autori
Bogdanić, Grozdana ; Wichterle, Ivan

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Sborník CHISA 2011 / Halfar, R. - Prag : Česká společnost chemického inženýrství (ČSCHI), 2011, 149-149

ISBN
978-80-905035-0-2

Skup
58th Conference of Chemical and Process Engineering CHISA 2011

Mjesto i datum
Srní, Češka Republika, 24.10.2011. - 27.10.2011

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Vapor–liquid equilibrium; diluted polymer + toluene systems

Sažetak
Vapour–liquid equilibrium data were determined for five polymer + toluene systems at isothermal conditions between 60 and 100 oC. Polymers comprise copolymers and terpolymers of octadecyl acrylate (ODA), acrylic acid (AA), styrene (St), and 1-vinyl-2-pyrrolidone (VP) because of their practical importance as flow improvers for crude oil and/or derivatives. All-glass micro-ebulliometer with circulation of liquid phase was used for measurement of total pressure over polymer + toluene mixtures.1 To analyse the obtained data, we opted for the prediction of phase behaviour, as the data of two experimental points, including concentration end points, cannot be correlated with frequently used UNIQUAC equation. Two predictive models, the Entropic-FV activity coefficient model and the GC-Flory EOS model were applied to estimate the activity of toluene in a mixture with a polymer. Both models are based on the group contribution method. Two terpolymers, namely poly(ODA0.79–AA0.11–VP0.10) and poly(ODA0.82–St0.05–AA0.13) in mixtures with toluene were chosen as examples of solvent activity predictions, because values of all necessary group parameters for both models were at hand. Figures show the prediction of toluene activities in both the terpolymer solutions. It is obvious that the models are mutually comparable and in a good agreement. Moreover, the dependence of solvent activity on concentration provides a qualitative description of particular system behaviour over the whole concentration range including activity trends, since the prediction is based on group contributions, which comprises the structure of components involved. It is necessary to point out, that prediction procedures were not used for validation of experimental data, but to give an idea about the trend in activity vs. concentration dependence. As it can be seen, good agreement with experimental data was achieved. More information has been recently published.2 Figure 1. Activity of toluene in Figure 2. Activity of toluene in poly(ODA0.82–St0.05–AA0.13) at 90 oC. poly(ODA0.79–AA0.11–VP0.10) at 80 oC.  experimental data ; (••••) predicted by the Entropic-FV model ; (– – –) predicted by the GCFlory model References 1. J. Pavlíček, G. Bogdanić and I. Wichterle, Fluid Phase Equilib., 2010, 297 (1), 142–148. 2. G. Bogdanić, I. Wichterle, J. Chem. Eng. Data, 2011, 56, 1080–1083.

Izvorni jezik
Engleski

Znanstvena područja
Temeljne tehničke znanosti

Napomena
CD s punim tekstom

POVEZANOST RADA