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Low-Temperature SCR of NO over Physical Mixture of MnO2 and Metal-Loaded Activated Carbon  

Choi, Jong Cheol (Faculty of Environmental Engineering, University of Seoul)
Cho, Chul-Hoon (Nano Stech Co., Ltd., R&DB Center)
Jeong, Kwang-Eun (New Chemistry Division, Korea Research Institute of Chemical Technology)
Jeon, Jong-Ki (Department of Chemical Engineering, Kongju National University)
Yim, Jin-Hyeong (Division of Advanced Materials Engineering, Kongju National University)
Park, Young-Kwon (Faculty of Environmental Engineering, University of Seoul)
Publication Information
Applied Chemistry for Engineering / v.19, no.1, 2008 , pp. 92-97 More about this Journal
Abstract
Selective catalytic reduction (SCR) of NO with ammonia was carried out over the physical mixture of $MnO_2$ and K or Cu-loaded activated carbons (AC) at low temperature. Introduction of oxygen affected positively the reduction of NO. Metal-impregnated AC showed significantly enhanced catalytic activity. Without water, the mixed catalyst of $MnO_2$ and K-loaded AC exhibited the best activity in the reduction of NO at $120^{\circ}C$. On the contrary, the activities of all the catalysts were significantly diminished in the presence of water. The mixed catalyst of $MnO_2$ and Cu-loaded AC treated with nitric acid and heat (1 : 1, w/w) exhibited the better activity for the reduction of NO than each single catalyst in presence of water.
Keywords
selective catalytic reduction; $MnO_2$; activated carbon; physical mixture;
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