铁矿石催化剂低温SCR脱硝特性比较

Comparison of Iron Ore Catalysts for Low Temperature SCR of NO with NH_3

选取两种铁矿石制备脱硝催化剂,并将其应用于低温选择性催化还原(SCR)脱硝,研究反应温度、颗粒粒度和氨氮摩尔比对铁矿石催化剂脱硝性能的影响;考察铁矿石催化剂抗硫性能.实验结果表明:铁矿石1#具有更高的低温催化活性和抗硫性,在低温210℃可以实现68.5%的催化活性;颗粒粒度和氨氮摩尔比对铁矿石催化剂脱硝性能有重要影响,当氨氮摩尔比为1.0~1.2和颗粒粒度为60~100目时,脱硝性能更佳.

Two kinds of iron ore catalysts were prepared and used for low temperature selected catalytic reduction（ SCR） of NO with NH3. The effects of the reaction temperature,the particle size and [NH3]/[NO]molar ratio on NO conversion and the sulfur resistance of the catalysts were studied. The results showed that the 1 # iron ore catalyst exhibited a higher catalytic activity at low temperature and SO2 resistance,and could give 68. 5% NO conversion at 210 ℃. In addition,the particle size and [NH3]/[NO]molar ratio had an important effect on the deNOxperformance for iron ore catalysts. When the particle size and [NH3]/[NO]molar ratio were 60 ~ 100 mesh and 1. 0 ~ 1. 2,respectively,the iron ore catalysts showed a better catalytic activity.