Fe-Ce涂覆型整体式脱硝催化剂性能

The performance of Fe-Ce coated monolithic de NOx catalysts

将TiO2溶胶负载在堇青石载体上，再加入Fe和Ce作为活性组分，制得整体式铈铁催化剂Ce（x）-Fe／TiO2／CC（X=0、1、2、4、6、8）。采用XRD和BET对催化剂进行表征，使用固定床连续流动反应器考察催化剂的脱硝活性。结果表明，铈铁组分能够很好地负载于TiO2涂层上，不破坏其结构；添加ce的催化剂均有较好的催化活性，具有更大的比表面积和表面吸附氧。Ce与Fe物质的量比为4的催化剂Ce（4）-Fe／TiO2／CC在（200—350）qC脱硝率大于90％，优于其他组分的催化剂。因此，采用添加Ce并且Ce与Fe物质的量比为4的催化剂可以拓宽催化活性温度窗口，提高催化剂的脱硝活性。

Ce （x） -Fe/TiO2/CC （ x = 0,1,2,4,6,8 ） catalysts were prepared by loading TiO2 sol on the eordierite carrier, and adding the active components Fe and Ce. The catalysts were characterized by XRD and BET. The denitrification activity of the catalysts was inv The results showed that cerium and iron oxides could be w estigated in a fixed bed continuous flow reactor. ell supported on TiO2 coating without damaging its structure. After the addition of cerium, the catalysts possessed better denitrification performance, and larger specific surface area and higher surface adsorbed oxygen. Under the condition of reaction tempera- ture （200 -350） ℃, and Ce/Fe molar ratio 4, the removal efficiency of NO over Ce（4）-Fe/TiO2/CC catalyst was more than 90% ,which was superior to that over the catalysts with other components. Therefore, the catalyst prepared by adding cerium with cerium/iron molar ratio of 4 exhibited broaden temperature window of catalytic activity, and its denitrification activity was improved.