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A practical approach to fixed-site-carrier facilitated transport modeling for the separation of propylene/propane mixtures through silver-containing polymeric membranes

Abstract: In this work, a new consistent mathematical model for the description of the olefin flux through Ag+-containing polymeric dense membranes is proposed. A fixed site carrier "hopping" parameter acting as an effective permeability for this specific transport phenomenon is defined and calculated for the first time. This study reports a simple and versatile approach that can be incorporated into future models to simulate the more complex mobile/fixed hybrid mechanism acting in composite membranes. Furthermore, in order to validate the model, the proof of concept has been carried out with PVDF-HFP/AgBF4 facilitated transport membranes. The experimental analysis has been performed by the continuous flow permeation method through flat membranes containing increasing silver loads, from 17 to 38% w/w at olefin partial pressures ranging from 0.5 to 1.5 bar and temperatures of 293 and 303 K. These membranes showed a promising performance, reaching values of propylene permeability up to 1800 Barrer and very high propylene/propane selectivities. The reported model constitutes a very useful tool for process optimisation and scale-up.

 Autoría: Zarca R., Ortiz A., Gorri D., Ortiz I.,

 Fuente: Separation and Purification Technology, 2017, 180, 82-89

 Editorial: Elsevier

 Fecha de publicación: 08/06/2017

 Nº de páginas: 33

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.seppur.2017.02.050

 ISSN: 1383-5866,1873-3794

 Proyecto español: CTQ2015-66078-R ;

 Url de la publicación: https://doi.org/10.1016/j.seppur.2017.02.050