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

Gas-phase elemental mercury (Hg°) 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°), had 1.5 times higher removal capacity than AC impregnated with single S°. 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° removal by CSAC, while the presence of O₂ (up to 9%) increased the removal capacity up by 25%. [ABSTRACT FROM AUTHOR]