SCR denitration catalysts have been considered for the synergistic catalytic oxidation of gaseous elemental mercury (Hg⁰) depending on HCl in flue gas. In this study, FeOCl was used for the enhancement of Hg⁰ removal in chloride-free flue gas over a commercial SCR catalyst. The results indicated that loading 10% FeOCl can significantly improve the Hg⁰ removal efficiency of SCR catalyst to 97% at 250 °C in chloride-free flue gas. O₂ exerted an important positive effect on the conversion of Hg⁰ to HgO. The FeOCl/SCR catalyst exhibited satisfactory SO₂ and H₂O resistance. The examination of the mechanism of action indicated that Hg⁰ reacts with •Cl released from FeOCl/SCR to form HgCl₂. A spot of Hg⁰ can directly react with adsorbed surface oxygen to generate HgO fixed on the active site of FeO on the FeOCl/SCR catalyst via chemisorption.

SCR 脱硝催化剂已被考虑用于气态元素汞 (Hg ⁰ )的协同催化氧化，这取决于烟道气中的 HCl。在本研究中，FeOCl 用于通过商用 SCR 催化剂增强无氯烟气中 Hg ^{0 的}去除率。结果表明，在250℃无氯烟气中，负载10%的FeOCl可以显着提高SCR催化剂的Hg ⁰去除效率至97%。O ₂对Hg ⁰向HgO的转化具有重要的积极影响。FeOCl/SCR催化剂表现出令人满意的SO ₂和H ₂ O耐受性。作用机制研究表明，Hg ⁰与从 FeOCl/SCR 释放的 •Cl 反应形成 HgCl ₂。一点Hg ⁰可以直接与吸附的表面氧反应生成HgO，通过化学吸附作用固定在FeOCl/SCR 催化剂上Fe O的活性位点上。