Removal of elemental mercury from simulated flue gas by a novel composite sulfurized activated carbon

Gas-phase elemental mercury (Hg degrees) removal by composite sulfurized activated carbon (CSAC) was studied under simulated flue gas conditions. The results showed that the CSAC, which was impregnated activated carbon (AC) with aqueous-phase sodium sulfide (Na2S) and followed with vapor-phase elemental sulfur (S degrees), had 1.5 times higher removal capacity than AC impregnated with single S degrees. This study further investigated the effect of individual flue gas components on the performance of CSAC. Fixed-bed experiments showed that SO2 and NO had no obvious impact on Hg degrees removal by CSAC, while the presence of O-2 (up to 9%) increased the removal capacity up by 25%.