Abstract
Ultrasonic impregnation method was used to prepare Mn-Ce composite catalysts with fly ash and alkali-modified fly ash serving as the catalytic carriers. The effects on the denitration activity and resistance of H2O and SO2 were studied. The structural characteristics of the catalysts were characterized and analyzed by XRD, XPS, SEM, TEM, TG, BET, and TPD/TPR. The results revealed that the active components Mn-Ce exhibited interaction, leading to a catalyst surface enriched with Mn4+, Ce3+, and chemisorption oxygen, thereby improving the catalytic activity. Through the alkali modification of fly ash, the structural properties of the carrier were changed, the distribution of active components was more uniform and the optimal loading capacity was increased. Alkali modified fly ash loaded with Mn and Ce had excellent surface acidity, redox characteristics, and abundant chemisorption oxygen, thereby enhancing the “rapid NH3-SCR” reaction. Finally, the catalytic resistance of H2O and SO2 was also excellent.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call