369 - Removal of elemental mercury from flue gas by recyclable magnetospheres catalyst from fly ash in a 1000MW coal-fired power plant

CuCl2–MF was a cost–efficient and highly efficient sorbent for Hg removal from flue gas in coal-fired units. In this study, the Hg0 adsorption and oxidation performance of CuCl2–MF with different conditions were studied at a 1000MW commercial scaled coal-fired power plant. Under the optimal conditions, the total removal efficiency of Hg and the Hg recovery rate reached 98.72% and 52.76% using CuCl2–MF injection combined with the existing pollutant control device. The magnetosphere particle size of 45μm–75μm exhibited the highest mercury removal capacity. Additionally, the final mercury emission concentration was 0.334μg/m3 and the corresponding relative mercury removal efficiency was 89.81%. The results of this study proved that elemental mercury removal by CuCl2–MF was also suitable for large-scale coal-fired units with a high Hg removal efficiency even in the low concentrations of mercury, which provided a reference for the practical application of this technology in other units in the future and supplied valuable experience for other mercury removal technologies.