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http://dx.doi.org/10.5762/KAIS.2016.17.7.713

NOx removal of Mn-Cu-TiO2 and V/TiO2 catalysts for the reaction conditions  

Jang, Hyun Tae (Department of Chemical Engineering, Hanseo University)
Cha, Wang Seog (Department of Environmental Engineering, Kunsan National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.17, no.7, 2016 , pp. 713-719 More about this Journal
Abstract
The NOx conversion properties of Mn-Cu-$TiO_2$ and $V_2O_5$/$TiO_2$ catalysts were studied for the selective catalytic reduction (SCR) of NOx with ammonia. The performance of the catalysts was investigated in terms of their $NOx$ conversion activity as a function of the reaction temperature and space velocity. The activity of the Mn-Cu-$TiO_2$ catalyst decreased with increasing reaction temperature and space velocity. However, the activity of the $V_2O_5$/$TiO_2$ catalyst increased with increasing reaction temperature. High activity of the Mn-Cu-$TiO_2$ catalyst was observed at temperatures below $200^{\circ}C$. H2-TPR and XPS analyses were conducted to explain these results. It was found that the activity of the Mn-Cu-$TiO_2$ catalyst was influenced by the thermal shock caused by the change of the initial reaction temperature, whereas the $V_2O_5$/$TiO_2$ catalyst was not affected by the initial reaction temperature. In the case of catalyst C, the $NO_x$ conversion efficiency decreased with increasing space velocity. The decrease in the $NO_x$ conversion efficiency with increasing space velocity was much less for catalyst D than for catalyst C.
Keywords
Mn-Cu-$TiO_2$ catalyst; $V_2O_5$/$TiO_2$ catalyst; $NO_x$ conversion; reaction temperature; space velocity;
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