FeMnTiOx catalyst is prepared via co-precipitation method,and the surface acidity and redox capacity of the catalyst is regulated through varying the calcination temperature and the Fe/Mn molar ratio,therefore its performance in synergistic denitrification and mercury removal is optimized.The structure of FeMnTiOx catalyst and the catalytic reaction mechanism are analyzed by using X-ray diffraction,electron microscopy,N2 adsorption/desorption,hydrogen temperature-programmed reduction,ammonia temperature-programmed desorption and X-ray photoelectron spectroscopy.It is indicated that the conversion of NO by Fe0.5MnTiOx-400 catalyst exceeds 90%in the temperature range of 150-330℃when the catalyst is prepared at a calcination temperature of 400℃ and a Fe/Mn molar ratio of 0.5.By using this catalyst,the conversion of Hg0 at 200℃ is higher than 90%,and the denitrification efficiency reaches 100%,showing good synergistic denitrification and mercury removal performance.
transition metal oxidesselective catalytic reductiondenitrificationoxidation of elemental mercuryreaction mechanism