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Extension of the wilson-NRF gibbs energy model in correlating vapor-liquid and liquid-liquid phase behavior of polymer-polymer aqueous two-phase systems

Pazuki, G. R ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. DOI: 10.1080/01932690802553916
  3. Publisher: 2009
  4. Abstract:
  5. In this work, the proposed model by Pazuki et al. based on the Local Composition Concept (LCC), has been used in correlating the vapor-liquid phase behavior of polymer solutions and the liquid-liquid phase behavior of aqueous two-phase systems. The Flory-Huggins model has been used as the combinatorial part of the proposed model, as well as the model proposed by Pazuki et al. was considered as the residual term. The proposed model has been used in correlating the vapor-liquid phase behavior for a number of PEG-Water systems at constant temperature. The results obtained from the proposed model have been compared with those obtained from the Poly-NRTL and the Poly-Wilson models. The results showed that the proposed model can accurately correlate the VLE data for PEG-Water systems. Also, the proposed model has been used to obtain phase behavior of aqueous two-phase systems for PEG-DEX-Water systems. The results obtained from the proposed model have been compared with those obtained from the UNIQUAC and the UNIQUAC-NRF models. The results showed that the proposed model can accurately correlate liquid-liquid phase behavior of aqueous two-phase systems than the UNIQUAC and the UNIQUAC-NRF models
  6. Keywords:
  7. Polymer solution ; Aqueous two phase system ; Constant temperature ; Flory-huggins model ; Gibbs energy model ; Liquid-liquid phase ; LLE ; Local compositions ; NRF model ; UNIQUAC ; Vapor-liquid ; VLE ; VLE data ; Water system ; Wilson model ; Wilson-NRF ; E-learning ; Gibbs free energy ; Liquids ; Phase behavior ; Phase equilibria ; Pipe flow ; Polyethylene glycols ; Polymer solutions ; Polymers ; Water piping systems ; Water vapor ; Waterworks ; Mathematical models
  8. Source: Journal of Dispersion Science and Technology ; Volume 30, Issue 4 , 2009 , Pages 534-539 ; 01932691 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/01932690802553916