CeO2/ACF的低温SCR烟气脱硝性能研究

在氧存在下以NH3为还原剂的选择性催化还原烟气NOX技术（SCR）已经工程化。工业中常用的催化剂，主要是V2O5／TiO2或V2O5-WO3／TiO2，在300℃～400℃表现出高的NOX脱除率。为此，选择性催化还原法（SCR）装置须安装在空气预热器之前和省煤器之后，以利用过程的烟气温度。但这里存在的高浓度粉尘和SO2容易引起催化剂中毒和使用寿命减少，因此，研究开发低温运行（〈300℃）的SCR催化剂，使催化反应器能布置在除尘或／和脱硫之后，具有重要意义。同时烟道废气的温度会因生产装置负荷的变化而有较大的波动，这就要求催化剂具有较宽的高活性温度区间。

Low temperature SCR of NO in flue gas on CeO2/ACF

The selective catalytic reduction (SCR) of NOx using MnOx and CeO2 supported on viscose based active carbon fibers (ACF) at 120℃～270℃ relatively lower than the temperature when using V2O5/TiO2 anatase catalyst was studied. As a result, CeO2/ACF shows a better catalysis than MNOx/ACF, which is not affected by the reaction temperature. NO conversion of 85% is reached with the 10% CeO2/ACF catalyst at the whole temperature window. Furthermore, a series of MnOxCeO2/ACF composite catalysts were studied. The results show that the loading method of catalyst affects its activity.