| 低温条件下Nano-MnOx上NH3选择性催化还原NO |
| 摘要点击 1843 全文点击 3585 投稿时间：2006-02-20 修订日期：2006-03-14 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 选择性催化还原 低温 一氧化氮 氨 锰氧化物 |
| 英文关键词 selective catalytic reduction (SCR) low-temperature NO ammonia MnOx |
|
| 中文摘要 |
| 采用流变相法制备了无载体Nano-MnOx催化剂，在低温条件下(50～150℃)以NH3为还原剂系统考察了氮氧化物的选择催化还原特性.结果表明，流变相法制备的Nano-MnOx催化剂具有良好的低温催化活性.实验条件下，80℃即可获得98.25%的NO转化率，100～150℃内NO几乎完全转化；SO2和H2Ｏ会与NO和NH3在催化剂表面产生竞争吸附，导致催化活性下降，但该影响是可逆的.经分析，较大的比表面积和较低的晶化度是Nano-MnOx具有良好低温活性的2个主要原因. |
| 英文摘要 |
| Nanometer particles composed of manganese oxides (Nano-MnOx), which prepared by rheological phase reaction method, show superior low-temperature SCR activity for NO with NH3 in the presence of excess O2. In experiments, the NO conversion is 98.25% at 80℃, and nearly 100% NO could be converted in 100～150℃. Due to the reason of competing adsorption, H2Ｏ has a slight impact on the activity and the deactivation of SO2 is reversible. The experiments implied that the superior low-temperature catalytic activity of Nano-MnOx was mainly due to its high BET specific areas and poor crystallinity. |
