Original scientific paper

The UNIQUAC-NRF Segmental Interaction Model for Vapor-Liquid Equilibrium Calculations for Polymer Solutions

Hamid R. RADFARNIA ; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Grozdana BOGDANIĆ ; INA-Industrija nafte d.d., Research and Development Sector, Zagreb
Vahid TAGHIKHNAI ; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran
Cyrus GHOTBI ; Department of Chemical and Petroleum Engineering, Sharif University of Technology, Tehran, Iran

Abstract

This paper presents a new segment-based thermodynamic model containing the combinatorial and energetic contributions to the excess Gibbs energy for correlating/predicting of the vapor-liquid equilibrium (VLE) of polymer solutions. The model is derived from the UNIQUAC-NRF model, recently proposed by Haghtalab and Asadollahi, following the idea to associate the nonideality of polymer-solvent mixture with polymer segment-solvent interaction parameters. Segment activity coefficients are calculated by means of the UNIQUAC-NRF model. At the present state of development, 16 binary segmental interaction parameters have been estimated. The capability of the model is demonstrated with successful representation of VLE correlation/prediction for 40 polymer-solvent systems. The model is capable of correlating predicting the VLE of polymer solutions with satisfactory accuracy and can provide a thermodynamic framework for calculating the VLE of polymer solutions using weakly temperature-dependent UNIQUAC-NRF parameters.

Keywords

polymer solutions; segmental interaction UNIQUAC-NRF model; vapor-liquid equilibrium calculation

Hrčak ID:

388

URI

https://hrcak.srce.hr/388

Publication date:

20.2.2006.

Article data in other languages: croatian

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