MODELLING AND OPTIMIZATION OF ELECTRODIALYSIS DESALINATION AND ELECTRICALLY DRIVEN MOLECULE TRANSPORT WITHIN A SERIES OF NOVEL IONOMERS

摘要

The need for fresh water is at the top of the international agenda of critical problems, considered as important as climate change. As a consequence of the growing scarcity of freshwater, the implementation of desalination plants is increasing on a large scale. Electrodialysis (ED) is a separation technique for ionic solutions through an electrochemical membrane that has been used in industry for several decades. ED process can provide products of high quality or are more environmentally friendly, which can significantly change the features of conventional processes and have great advantage in the recovery of resources, the control of pollutants, and the chemical processing because of the simple process, high efficiency, and low disposal of wastes. The increase in environmental awareness and the raw material cost has accelerated the application of ED-based integrations, especially in highly industrialized and densely populated countries. ED industrial applications encompass several industries and include the desalination, amino acids from protein hydrolysates, salts, acids, and alkali from industrial rinse waters, fruit juice deacidification, sugar and molasses desalting and blood plasma protein recovery. In our study, we analyze the process of ion flow through a series ionomer films including the anion exchange membrane, AEM (PC-SA) and cation exchange membrane, CEM (PC-SK) (provided by PCCell Corp.), poly[t-butyl styrene-b-hydrogenated isoprene-b-sulfonated styrene-b-hydrogenated isoprene- b-t-butyl styrene) (tBS-HI-S-HI- tBS), Penta Block Copolymer, (PBC) as shown in Fig. 1 (provided by Kraton Polymers LLC, Houston, TX , sulfonated polyphenylene (sPP), Nafion and aminated: poly[tetramethyl polysulfone-b- polyphenylsulfone] (TMPS-PPSU) block copolymer. Comparing power consumption and desalination performance, it is significantly accepted that sPP and TMPS-PPSU are kind of novel, low energy consuming, and less time requiring ionomers in the process of ED with great chemical and physical properties.