Abstract The MnOx/PG catalysts were prepared by supporting Mn oxides to palygorskite (PG) and used to remove Hg0 in simulated flue gas, which were analyzed and characterized by the specific surface area analysis (BET), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results show that the co-effect of MnOx and PG significantly enhances the Hg0 removal performance; the MnOx/PG catalyst with 8% MnOx loading has the highest Hg0 removal activity. The Hg0 removal efficiency can maintain above 95% at 210°C with a space velocity of 6000 h−1 and an inlet Hg0 concentration of 80 μg/m3 for 400 min. O2 can promote the Hg0 removal by MnOx/PG catalysts, while SO2 and H2O have inhibitory effects. In the presence of O2, the inhibitory effect of SO2 can be obviously weakened. The results of XRD, XPS and temperature programmed desorption experiments (TPD) indicate that the active components MnOx disperse well on the surface of PG. The removal process of Hg0 on the MnOx/PG catalyst includes the steps of adsorption, oxidation and reaction, and HgO and HgSO4 are generated and adsorbed on the catalyst.

中文翻译：

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坡缕石 (PG) 负载 MnO 催化剂去除 Hg0

摘要 以锰氧化物负载坡缕石（PG）制备MnOx/PG催化剂，用于脱除模拟烟气中的Hg0，并通过比表面积分析（BET）、X射线衍射（XRD）和X 射线光电子能谱 (XPS)。结果表明，MnOx和PG的共同作用显着提高了Hg0的去除性能；MnOx 负载量为 8% 的 MnOx/PG 催化剂具有最高的 Hg0 去除活性。在 210°C、空速为 6000 h-1、入口 Hg0 浓度为 80 μg/m3 400 min 时，Hg0 去除效率可保持在 95% 以上。O2可以促进MnOx/PG催化剂对Hg0的去除，而SO2和H2O有抑制作用。在O2存在下，SO2的抑制作用会明显减弱。XRD结果，XPS和程序升温脱附实验（TPD）表明活性成分MnOx在PG表面分散良好。MnOx/PG催化剂上Hg0的脱除过程包括吸附、氧化和反应等步骤，生成HgO和HgSO4并吸附在催化剂上。