Electro-chemical oxidation of gaseous elemental mercury via a gas diffusion reactor with Fenton-like catalyst

An electrode in situ catalytic oxidation of elemental mercury (Hg 0 ) in flue gas using Fenton-like catalysts in a self-made reactor was proposed. The catalysts were prepared by a hydrothermal method, and the catalysts were loaded on the electrode and could improve the removal efficiency of Hg 0 . About 240 μg/m 3 of elemental Hg 0 could be removed in 40 min. The morphology and structure information of the prepared catalysts were characterized by SEM, EDS, XRD, SEM, XPS and so on. The effects of operation parameters (voltage, inlet flow, electrolyte concentration, initial concentration of Hg 0 , pH of solution) were investigated. The above results showed the strong oxidative effect of hydroxyl radicals (·OH), which was produced by the catalysts playing a dominative role during Hg 0 removal reactions. Graphical