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Feed and Bleed Bipolar Membrane Electrodialysis Process

Mohamed Amine BEN ALI ABA, Wessam N. El-Sayed


In this study, a bipolar membrane electrodialysis process (BPMED) is applied to regenerate nitric acid and ammonia by splitting ammonium nitrate. Firstly, we have proved the process feasibility in batch mode. Secondly, using the same operating conditions, we have proposed to extend the study to a continuous (feed and bleed) operating mode. Forecast calculations, derived from the balance material equations, and using the batch mode results, allowed the estimation of the continuous functioning parameters for both acid and salt.  There is a good agreement between the performances of the two functioning modes. The acid and ammonia current efficiencies reached respectively 85 and 83 % in batch processing, and 83 and 80 % in continuous processing. 

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