Investigation of Producing Chlorine with Electro Dialysis Method and the Effect of Operating Parameters


Abstract

With emergence of production processes of Sodium Hydroxide with mercury and diaphragmatic Electrolysis methods and identifying harmful effects of using mercury and Asbestos and also environmental and economic problems, these processes are turned to one of difficulties and concerns of Petrochemical Industry and countries intend to eliminate these processes and use membrane cell method. Chlor-al-kali industry is considered as an industry with the purpose of producing chlorine, alkaline, Sodium hydroxide or Potassium hydroxide by electrolyzing saline solution. In the membrane cell, anode and cathode are separated by anion and impervious conductor membrane with water, saline solution has passed through them and chloride ions are oxidized to chloride gas and Sodium ions are penetrated from membrane (selectivity) and are directed to the cathode that sodium hydroxide is flowing in it. In addition to the way of penetrating to membrane (Diffusion), in this investigation the effect of operating parameters are examined; such as concentration, temperature, pressure, pH, current density and input flow rates on membrane cell operation, the increase in penetration and chlorine production.

Keywords: chlorine, membrane cell, electrolysis, diffusion, anode, cathode

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(10.14266/ajoct16-1)