Study on the regeneration process of mercury removal liquid via ion-exchange membrane electrolysis

With high steam pressure and low solubility, the Hg⁰ in coal flue gas needs to be oxidized and absorbed in the solution, but the cost is very high. With the membrane electrolysis of mercury removal liquid using NaClO as oxidants, not only can we extract the elemental mercury, we will also realize the regeneration of the absorbing liquid. Thus, the cost of wet flue gas mercury removal is reduced. In our study, we analyzed the principle of electrolysis, tested the circulation volt-ampere characteristic, determined the electrolytic electrode potential and tested the effects of different reaction conditions on the electrolytic current efficiency in H-shape electrolytic bath, which provides reference for the industrial application of this technology.