Fe-modified Ce-MnO/ACF catalysts for selective catalytic reduction of NO by NH at low-middle temperature.

A series of MnO/ACF, Ce-MnO/ACF, and Fe-Ce-MnO/ACF catalysts on selective catalytic reduction (SCR) of NO with NH at low-middle temperature had been successfully prepared through ultrasonic impregnation method, and the catalysts were characterized by SEM, XRD, BET, H-TPR, NH-TPD, XPS, and FT-IR spectroscopy, respectively. The results demonstrated that the 15 wt% Fe-Ce-MnO/ACF catalyst achieved 90% NO conversion (100~300 °C), good water resistance, and stability (175 °C). The excellent catalytic performance of the Fe-Ce-MnO/ACF catalyst was mainly attributed to the interaction among Mn, Ce, and Fe. The doping of Fe promoted the dispersion of Ce and Mn and the formation of more Mn and chemisorbed oxygen on the surface of a catalyst. This work laid a foundation for the successful application of active carbon fiber in the field of industrial denitrification, especially in the aspect of denitrification moving bed. Graphic abstract.