Effect of CaCO(3) on catalytic activity of Fe–Ce/Ti catalysts for NH(3)-SCR reaction

In the present work, fresh and Ca poisoned Fe–Ce/Ti catalysts were prepared and used for the NH(3)-SCR reaction to investigate the effect of Ca doping on the catalytic activity of catalysts. And these catalysts were characterized by BET, XRD, Raman, UV-vis DRS, XPS, H(2)-TPR, and NH(3)-TPD techniques. The obtained results demonstrate that Ca doping could lead to an obvious decrease in the catalytic activity of catalysts. The reasons for this may be due to the smaller specific surface area and pore volume, the decreased ratio of Fe(3+)/Fe(2+) and Ce(3+)/Ce(4+), as well as the reduced redox ability and surface acidity.