| 低温条件下Nano-MnOx上NH3选择性催化还原NO |
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| 引用本文： | 唐晓龙,郝吉明,徐文国,李俊华.低温条件下Nano-MnOx上NH3选择性催化还原NO[J].环境科学,2007,28(2):289-294. |
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| 作者姓名： | 唐晓龙 郝吉明 徐文国 李俊华 |
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| 作者单位： | 北京理工大学化学物理研究所,北京100081;清华大学环境科学与工程系,北京100084;北京理工大学化学物理研究所,北京100081;清华大学环境科学与工程系,北京100084 |
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| 基金项目： | 国家自然科学基金重点项目(20437010, 20507012) |
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| 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.
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| 关 键 词： | 选择性催化还原 低温 一氧化氮 氨 锰氧化物 |
| 文章编号： | 0250-3301（2007）02-0289-06 |
| 收稿时间： | 2006/2/20 0:00:00 |
| 修稿时间： | 2006-02-202006-03-14 |
Nano-MnOx Catalyst for the Selective Catalytic Reduction of NO by NH3 in Low-temperature |
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| Tang Xiao-Long,Hao Ji-Ming,Xu Wen-Guo,Li Jun-Hua.Nano-MnOx Catalyst for the Selective Catalytic Reduction of NO by NH3 in Low-temperature[J].Chinese Journal of Environmental Science,2007,28(2):289-294. |
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| Authors: | Tang Xiao-Long Hao Ji-Ming Xu Wen-Guo Li Jun-Hua |
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| Affiliation: | Institute for Chemical Physics, Beijing Institute of Technology, Beijing 100081, China. |
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| Abstract: | Nanometer particles composed of manganese oxides (Nano-MnO(x)), 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 degrees C, and nearly 100% NO could be converted in 100 - 150 degrees C. 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-MnO(x) was mainly due to its high BET specific areas and poor crystallinity. |
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| Keywords: | selective catalytic reduction (SCR) low-temperature NO ammonia MnOx |
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