Abstract Present work explored the effect of current density and applied voltage along with the performance of graphite and SS 316 L as electrodes in the electrodialytic separation of sulfuric acid from model spent acidic solution. The study established that applied voltage in the range of 2–12 V was most suitable for maintaining current densities in the range 2–50 mA/cm2 for different initial catholyte concentration. Around 90% acid separation could be achieved with more than 70% current efficiency. The electrical energy (kJ/l) required for the concentration enhancement of sulfuric acid by electrodialysis (ED) was estimated and was compared with the thermal energy required for the same by evaporation (EV). ED was found to be less energy intensive process. An economic evaluation of the integrated ED and EV was also carried out under present experimental conditions and the likelihood of which was found to be 21% and 24% more economical than standalone ED or EV respectively.

中文翻译：

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所选工艺参数对使用石墨电极电渗析分离和浓缩硫酸的影响

摘要 目前的工作探讨了电流密度和施加电压的影响以及石墨和 SS 316 L 作为电极在从模型废酸性溶液中电渗析分离硫酸中的性能。该研究确定，对于不同的初始阴极电解液浓度，2-12 V 范围内的施加电压最适合将电流密度保持在 2-50 mA/cm2 范围内。在电流效率超过 70% 的情况下，可以实现约 90% 的酸分离。估算了通过电渗析 (ED) 提高硫酸浓度所需的电能 (kJ/l)，并将其与蒸发 (EV) 所需的热能进行比较。发现 ED 是能源密集度较低的过程。