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DOI QR Code

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

반응조건에 대한 Mn-Cu-TiO2촉매와 V/TiO2촉매의 탈질 특성

  • Jang, Hyun Tae (Department of Chemical Engineering, Hanseo University) ;
  • Cha, Wang Seog (Department of Environmental Engineering, Kunsan National University)
  • Received : 2016.05.19
  • Accepted : 2016.07.07
  • Published : 2016.07.31

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.

Acknowledgement

Supported by : 산업자원부

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