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Selective Catalytic Reduction of NO on Manganese Sulfates  

Jeong, Soon Kwan (Clean Coal Research Center, Korea Institute of Energy Research)
Park, Tae Sung (Carbon Dioxide Reduction and Sequestration R&D Center)
Hong, Sung Chang (Department of Environmental Engineering, Kyonggi University)
Publication Information
Korean Chemical Engineering Research / v.46, no.3, 2008 , pp. 473-478 More about this Journal
Abstract
In this experimental, selective catalytic reduction (SCR) of NO with NH3 over manganese sulfates and manganese sulfates was investigated with catalytic activity, kinetics, temperature programmed reduction (TPR) and TGA. Manganese oxides showed high catalytic activity for SCR at temperature below $200^{\circ}C$. In case of manganese sulfates, the temperature at which SCR of nitric oxide appears shifted to high temperature with sulfation degree, and the maximum catalytic efficiency decreased. The temperature of the onset of reduction for manganese oxides and manganese sulfates is about $160^{\circ}C$ and over $280^{\circ}C$, respectively. We suggest that the onset of reduction in TPR correlates with the onset of SCR activity. Because the pre-exponential factor of manganese sulfates is lower as 1/1000 times than that of other catalysts, catalytic activity of manganese sulfates for NO showed low. The reduction temperature of natural manganese ore which consists of various metal oxides showed lower than that of pure manganese oxides.
Keywords
Manganese Oxide; Manganese Sulfate; Selective Catalytic Reduction; TPR;
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Times Cited By KSCI : 1  (Citation Analysis)
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