Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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DeNOx by Hydrocarbon-Selective Catalytic Reduction on Ag-V/γ-Al2O3 Catalyst

Ag-V/γ-Al2O3 촉매상에서 탄화수소-Selective Catalytic Reduction에 의한 질소산화물 저감

  • Kim, Moon-Chan (Department of Environmental Engineering, Division of Environmental Science Chongju University) ;
  • Lee, Cheal-Gyu (Department of Environmental Engineering, Division of Environmental Science Chongju University)
  • 김문찬 (청주대학교 이공대학 환경학부 환경공학전공) ;
  • 이철규 (청주대학교 이공대학 환경학부 환경공학전공)
  • Received : 2004.09.30
  • Accepted : 2005.04.19
  • Published : 2005.06.10

Abstract

In order to remove the NO contained in exhaust gas by the non-selective catalyst reduction method, the catalysts were prepared by varing the loading amount of Ag and V into ${\gamma}-Al_2O_3$. The conversion of $NO_x$ using the prepared catalysts was studied by varying the temperatures, $O_2$ concentrations and $SO_2$ concentrations using. The influence of the catalyst structure on $NO_x$ conversion was studied through the analysis of the physical properties of the prepared catalysts. In the case of $AgV/{\gamma}-Al_2O_3$ catalyst, the $NO_x$ conversion was lower than that of $Ag/{\gamma}-Al_2O_3$ at higher temperatures but higher than that of $Ag/{\gamma}-Al_2O_3$ at lower temperatures. Even though $SO_2$ was contained in the reaction gas, the $NO_x$ conversion did not decrease. Based on the analysis including XRD, XPS, TPR, and UV-Vis DRS before and after the experiments, the experimental results were examined. The results indicated that, $NO_x$ conversion decreased at higher temperatures since Ag oxide could not be maintained well due to the addition of V, whereas it increased at temperatures lower than $300^{\circ}C$ due to the catalytic action of V.

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References

  1. Airpollution Research Associate, Donghwa Kisul, p.67 (1996)
  2. C.-Y. Lee, Master Thesis, Hanyang Univ., Seoul, Korea (1991)
  3. B.-H. Kim, Master Thesis, Konkook Univ., Seoul, Korea (1992)
  4. S. Satokawa, J. Shibata, K.-I. Shimizu, A. Satsuma, and T. Hattori, Appl. Catal. B, 42, 179 (2003) https://doi.org/10.1016/S0926-3373(02)00231-X
  5. C. Shi, M. Cheng, Z. Qu, and X. Bao, Appl. Catal. B, 51, 171 (2004) https://doi.org/10.1016/j.apcatb.2003.12.003
  6. M. Richter, U. Bentrup, R. EckeIt, M. Schneider, M.-M. Pohl, and R. Fricke, Appl. Catal., 51, 261 (2004)
  7. T. Miyadera, Appl. Catal. B, 2, 199 (1993) https://doi.org/10.1016/0926-3373(93)80048-I
  8. T. Miyadera, Appl. Catal. B, 13, 157 (1997) https://doi.org/10.1016/S0926-3373(96)00100-2
  9. S. Kameoka, T. Chafik, Y. Ukisu acd, and T. Miyadera, Catal. Lett., 51, 11 (1998) https://doi.org/10.1023/A:1019041118880
  10. T. E. Hoost, R. J. Kudla, K. M. Collins, and M. S. Chattha, Appl. Catal. B, 13, 59 (1997) https://doi.org/10.1016/S0926-3373(96)00090-2
  11. K. A. Bethke and H. H. Kung, J. Catal., 172, 93 (1997) https://doi.org/10.1006/jcat.1997.1794