Abstract Scope |
NH3-SCR is the most efficient denitration method for sintering flue gas. In this study, nano manganese ferrites (MFO NPS) prepared from ferromanganese ores with additions of 1-15wt% were directly spray-supported on activated carbon (AC) produced from coking coal for low-temperature denitration. All catalyst samples were characterized by BET, XRD, SEM, FT-IR, and XPS. The results showed that the MFO NPS was uniformly dispersed on the AC surface, and 8wt% MFO NPS/AC provided the best specific surface area (560.0 m2/g), strength (550.3 N), and denitration rate in the range of 120-300 ℃. From 120 to 300°C, the denitration rate rises from 64% to 85%, which is usually 30% greater than the initial AC. Because of the catalytic effect of Mn ion of MFO, NH3 is encouraged to form coordinated NH3 and NH4+ and then react with NO to generate N2 and H2O, thus exhibiting effective low-temperature NH3-SCR performance. |