A dual-functional MnO₂/La_0.6Sr_0.4MnO₃ composite catalyst was prepared and tested for the oxidation of elemental mercury (Hg⁰) present in the coal-derived flue gas. The thus derived Hg²⁺ can then be removed from the flue gas via current pollution control devices. The MnO₂ appears as the active component for the oxidation of elemental mercury, whereas the superior magnetic property of La_0.6Sr_0.4MnO₃ catalytic component makes the catalyst recoverable from the fly-ash mixture. The Hg⁰ oxidation efficiency was found larger than 80% in the temperature range of 150–300 °C and at a GHSV of 120,000 mL/ (g h), whereas the catalytic efficiency could be further increased to >95% in the presence of 5 ppm HCl in the flue gas.

制备了双功能MnO ₂ / La _0.6 Sr _0.4 MnO ₃复合催化剂，并测试了源自煤的烟道气中元素汞（Hg ⁰）的氧化。然后可以通过当前的污染控制装置从烟道气中除去由此得到的Hg ²⁺。MnO ₂似乎是元素汞氧化的活性组分，而La _0.6 Sr _0.4 MnO ₃催化组分的优异磁性使该催化剂可从粉煤灰混合物中回收。汞⁰ 在150–300°C的温度范围和GHSV为120,000 mL /（gh）时，发现氧化效率大于80％，而在5 ppm HCl存在下，催化效率可以进一步提高至> 95％。烟气。