Evaluation of the membrane properties with changing iodine molar ratio in HIx (HI–I2–H2O mixture) solution to concentrate HI by electro-electrodialysis

Effect of asymmetric variation of operating parameters on EED cell for HI concentration in I–S cycle for hydrogen production

“…Anolyte iodine concentration affected V cell more strongly as compared to the catholyte iodine concentration. EED cell resistance was reported to increase with increase in iodine concentration [22]. Separate increase in iodine concentration of anolyte and cathode done in this work, suggested that cell resistance increased more by increase in iodine concentration of anolyte than the catholyte.…”

“…Studies on EED cell also suggested that the resistance of the EED cell increases with increase in the iodine content of the HI x feed solution in a symmetric system (identical anode and cathode compartments and identical initial concentration of anolyte and catholyte) [22]. Increase in the resistance was ascribed to the reduced mobility of the iodide ion which forms poly-iodide complex with iodine.…”

Ion-exchange membranes in chemical synthesis – a review

“…In electro-oxidation of cerium(III) sulfate to cerium(IV) at the anode, AEM separates products and allows SO 4 2-transport from the cathode compartment to balance charges [39]. ME has also been successfully used to increase the concentration of hydroiodic acid by combining the redox reactions in the iodine-iodide system and directed proton permeation through perfluorinated CEMs [40][41][42][43]. As a result of ME concentration, HI content in the catholyte increased to over the quasi-azeotropic level (about 10 mol kg -1 ), while its anolyte content decreased.…”