负载Mn的Fe基MOFs脱汞剂烟气脱汞研究

基于Fe基金属有机骨架（MOFS）作为载体，采用浸渍法制备了负载6% Mn的Mn/MIL-100（Fe）脱汞剂。在模拟烟气中，搭建固定床研究了Mn/MIF-100（Fe）脱除单质汞（Hg⁰）性能。采用X射线衍射分析（XRD）、X射线电子能谱（XPS）、N₂吸附-脱附（BET）和热重分析（TGA）对材料进行表征。研究表明，Mn/MIF-100（Fe）脱除单质汞（Hg⁰）效率较高，在250℃，空速（GHSV）为180000h^-1时，脱汞（Hg⁰）效率达82%以上。Mn/MIF-100（Fe）主要的脱汞机理是催化氧化，Mn的负载促进了汞的吸附，并随着烟气温度的提高，单质汞的氧化效率逐渐提高。O₂和NO促进汞的脱除，SO₂和NH₃抑制汞的脱除。Mn/MIL-100（Fe）整体上对复杂烟气的适应能力强。

Study on the mercury removal using Mn loaded Fe-based MOFs

The Mn/MIL-100 (Fe) mercury removal agent loaded with 6% Mn was prepared by impregnation method using Fe-based metal organic framework (MOFs) as the support. A set of fixed bed reactor apparatus was installed and used to study the performance of Mn/MIF-100(Fe) to remove elemental mercury (Hg⁰) in the simulated flue gas. The materials were characterized by XRD, XPS, BET and TGA. The results showed that Mn/MIF-100 (Fe) had high efficiency in removing elemental mercury (Hg⁰). When the GHSV was 180000 h^-1 at 250℃, the mercury removal (Hg⁰) efficiency was above 82%. The main mercury removal mechanism of Mn/MIF-100 (Fe) was oxidation, and the loading of Mn promoted the adsorption of mercury. With the increase of flue gas temperature, the oxidation efficiency of elemental mercury was gradually increased. O₂ and NO promoted the removal of mercury while SO₂ and NH₃ inhibited the removal of mercury. Mn/MIL-100(Fe) had a strong adaptability to the complex flue gas as a whole.