The Removal of Elemental Mercury by Potassium Permanganate-modified Rice Husk Ash Sorbents

摘要

The elemental mercury (Hg~0) capture of potassium permanganate (KMnO_4)-modified calcium-based with rice husk ash sorbent (CaO/RHA) was first tested to evaluate the effectiveness of Hg~0 adsorption. The KMnO_4 modified CaO/RHA performances were compared with that of modified Ca-based with fly ash sorbent (CaO/FA). The effects of supports, pore size distribution, oxidants loading, temperature, and gas mixture were also investigated to understand the mechanism in capturing Hg~0. The CaO/RHA/KMnO_4 sorbent could remove over 90% of Hg~0 under the simulated flue gas.