Electro-chemical oxidation of gaseous elemental mercury via a gas diffusion reactor with Fenton-like catalyst
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An electrode in situ catalytic oxidation of elemental mercury (Hg0) 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 Hg0. About 240 μg/m3 of elemental Hg0 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 Hg0, 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 Hg0 removal reactions.
KeywordsGaseous elemental mercury Electro-chemical oxidation Gas diffusion reactor Hydroxyl radicals (·OH)
This research is based upon work supported by the National Natural Science Foundation of China (Project No. 21307032) and “the Fundamental Research Funds for the Central Universities.” Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the authors and do not necessarily reflect the view of the supporting organizations.
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