Catalytic Removal of Elemental Mercury Using Nanostructured SiO2-TiO2 and SiO2-TiO2-V2O5 Composites

摘要

Coal-fired utility boilers are currently the largest single-known source of anthropogenic mercury (Hg) emissions in the United States1. The U.S. EPA issued the Clean Air Mercury Rule (CAMR) in 2005 to permanently cap and reduce Hg emissions from coal-fired power plants2. Hg speciation studies showed that elemental Hg (Hg0) is the dominant species in flue gas when burning low rank (subbituminous or lignite) coals; however, Hg0 is volatile and insoluble in water, and thus, is poorly captured using conventional control technologies.