Korean Journal of Chemical Engineering

The Korean Institute of Chemical Engineers (한국화학공학회)
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Effect of vanadium surface density and structure in VOx/TiO2 on selective catalytic reduction by NH3

  • Won, Jong Min (Department of Environmental Energy Systems Engineering, Kyonggi University) ;
  • Kim, Min Su (Department of Environmental Energy Systems Engineering, Kyonggi University) ;
  • Hong, Sung Chang (Department of Environmental Energy Systems Engineering, Kyonggi University)
  • Received : 2018.03.28
  • Accepted : 2018.09.29
  • Published : 2018.12.01
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Abstract

We investigated the correlation between vanadium surface density and VOx structure species in the selective catalytic reduction of NOx by $NH_3$. The properties of the $VOx/TiO_2$ catalysts were investigated using physicochemical measurements, including BET, XRD, Raman spectroscopy, FE-TEM, UV-visible DRS, $NH_3-TPD$, $H_2-TPR$, $O_2-On/Off$. Catalysts were prepared using the wet impregnation method by supporting 1.0-3.0 wt% vanadium on $TiO_2$ thermally treated at various calcination temperatures. Through the above analysis, we found that VOx surface density was $3.4VOx/nm^2$, and the optimal V loading amounts were 2.0-2.5 wt% and the specific surface area was $65-80m^2/g$. In addition, it was confirmed that the optimal VOx surface density and formation of vanadium structure species correlated with the reaction activity depending on the V loading amounts and the specific surface area size.

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Acknowledgement

Supported by : Center for Environmentally Friendly Vehicle (CEFV)

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