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 agendarnof critical problems, considered as important as climate change. As arnconsequence of the growing scarcity of freshwater, thernimplementation of desalination plants is increasing on a large scale.rnElectrodialysis (ED) is a separation technique for ionic solutionsrnthrough an electrochemical membrane that has been used in industryrnfor several decades. ED process can provide products of highrnquality or are more environmentally friendly, which can significantlyrnchange the features of conventional processes and have greatrnadvantage in the recovery of resources, the control of pollutants, andrnthe chemical processing because of the simple process, highrnefficiency, and low disposal of wastes. The increase inrnenvironmental awareness and the raw material cost has acceleratedrnthe application of ED-based integrations, especially in highlyrnindustrialized and densely populated countries. ED industrialrnapplications encompass several industries and include therndesalination, amino acids from protein hydrolysates, salts, acids, andrnalkali from industrial rinse waters, fruit juice deacidification, sugarrnand molasses desalting and blood plasma protein recovery. 4 In ourrnstudy, we analyze the process of ion flow through a series ionomerrnfilms including the anion exchange membrane, AEM (PC-SA) andrncation exchange membrane, CEM (PC-SK) (provided by PCCellrnCorp.), poly[t-butyl styrene-b-hydrogenated isoprene-b-sulfonatedrnstyrene-b-hydrogenated isoprene- b-t-butyl styrene) (tBS-HI-S-HItBS),rnPenta Bl℃k Copolymer, (PBC) as shown in Fig. 1 (provided byrnKraton Polymers LLC, Houston, TX 5, sulfonated polyphenylenern(sPP), Nafion and aminated: poly[tetramethyl polysulfone-bpolyphenylsulfone]rn(TMPS-PPSU) bl℃k copolymer. Comparingrnpower consumption and desalination performance, it is significantlyrnaccepted that sPP and TMPS-PPSU are kind of novel, low energyrnconsuming, and less time requiring ionomers in the process of EDrnwith great chemical and physical properties.