Remove elemental mercury from simulated flue gas by flower-like MoS2 modified with nanoparticles MnO2

In this work, MoS2/MnO2 synthesized by hydrothermal methods was employed to remove Hg0 in flue gas. Benefited from the growth of MnO2 on the surface of MoS2, the specific surface area of the Mm adsorbent has increased. Compared with pure MoS2, specific surface area of Mm-30 has increased by 26.0287 m2/g. The MoS2 modified with 30 w.t. % MnO2 revealed higher mercury removal performance at 120 ?C, which reached 93%. The oxidation of mercury over Mm-30 is proposed to follow Mars-van Krevelen mechanism, whereby the lattice oxygen in the adsorbent is consumed. In presence of NO, HCl, O2 and SO2, the effect of different concentrations on mercury oxidation is observed. Mm-30 adsorbent reveals stable mercury removal performance in the presence of NO and HCl, while it also exhibited good sulfur resistance under the condition of 400 ppm SO2 + N2. This phenomenon indicates that the adsorbent can be applied in power plants with medium concentrations of SO2, which facilitated the application of Mm-30 as a potential mercury removal adsorbent for power plants.

Automated summary

In this study, MoS2/MnO2 adsorbent synthesized by hydrothermal methods showed efficient removal of Hg0 in flue gas, demonstrating excellent mercury removal performance and sulfur resistance.