Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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The Effects of Sulfate Formation and Mg Addition on the Selective Catalytic Reduction of NOx with CH4 on Ag/Al2O3 Catalysts

메탄에 의한 Ag/Al2O3 촉매의 선택적 탈질 환원촉매반응에서 탈질전환율에 미치는 황화물 형성의 영향과 Mg첨가 효과

  • Choi, Hee-Lack (Division of materials Science and Engineering, Pukyong National University) ;
  • Yu, Chang-Yong (Interfacial engineering Center, Korea Institute of Science and Technology) ;
  • Ha, Heon-Phil (Interfacial engineering Center, Korea Institute of Science and Technology)
  • 최희락 (부경대학교 재료공학과) ;
  • 유창용 (한국과학기술연구원 계면엔지니어링센터) ;
  • 하헌필 (한국과학기술연구원 계면엔지니어링센터)
  • Received : 2011.02.18
  • Accepted : 2011.03.30
  • Published : 2011.04.28
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Abstract

The influence of sulfate on the selective catalytic reduction of $NO_x$ on the Ag/$Al_2O_3$ catalyst was studied when $CH_4$ was used as a reducing agent. Various preparation methods influenced differently on the $deNO_x$ activity. Among the methods, cogelation precipitation gave best activity. When sulfates were formed on the surfaces of samples prepared by impregnated and deposition precipitation, $deNO_x$ activity was enhanced as long as suitable forming condition is satisfied. The major sulfate formed in Ag/$Al_2O_3$ catalyst was the aluminum sulfate and it seems that this sulfate acted as a promoter. When Mg was added to the Ag/$Al_2O_3$ catalyst it promoted $deNO_x$ activity at high temperature. Intentionally added sulfate also enhanced $deNO_x$ activity, when their amount was confined less than 3 wt%.

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References

  1. N. Y. Topsoe, J. A. Dumesic and H. Topsoe: J. Catal., 151 (1995) 226. https://doi.org/10.1006/jcat.1995.1024
  2. N. Y. Topsoe, J. A. Dumesic and H. Topsoe: J. Catal., 151 (1995) 241. https://doi.org/10.1006/jcat.1995.1025
  3. A. Miyamoto, Y. Yamazaki, M. Inomata and Y. Murakami J. Phys. Chem., 85 (1981) 2366. https://doi.org/10.1021/j150616a015
  4. R. Burch, J. P. Breen and F. C. Meunier: Appl. Catal. B, 39 (2002) 283. https://doi.org/10.1016/S0926-3373(02)00118-2
  5. K. Shimizu: Phys. Chem. Chem. Phys., 8 (2006) 2677. https://doi.org/10.1039/b601794k
  6. F. C. Meunier, J. P. Breen, V. Zuzaniuk, M. Olsson and J. R. H. Ross: J. Catal., 187 (1999) 493. https://doi.org/10.1006/jcat.1999.2622
  7. X. She and M. Flytzani-Stephanopoulos: Catal. Today, 127 (2007) 207. https://doi.org/10.1016/j.cattod.2007.04.010
  8. http://en.wikipedia.org/wiki/Standard_enthalpy_of_formation
  9. Y. Shi, H. Pan, Y. Zhang and W. Li: Catal. Commun., 9 (2008) 796. https://doi.org/10.1016/j.catcom.2007.09.002
  10. Z. Liu, J. Li and A. S. M. Junaid: Catal. Today, 153 (2010) 95. https://doi.org/10.1016/j.cattod.2010.01.061
  11. M. Tabata, H. Tsuchida, K. Miyamoto, T. Yoshinari, H. Yamazaki, H. Hamada, Y. Kintaichi, M. Sasaki and T. Ito: Appl. Catal. B, 6 (1995) 169. https://doi.org/10.1016/0926-3373(95)00013-5
  12. K. I. Shimizu, T. Higashimata, M. Tsuzuki and A. Satsuma: J. Catal., 239 (2006) 117. https://doi.org/10.1016/j.jcat.2006.01.011
  13. R. Ke, Q. Chen, J. Li, Y. Zhu and J. Hao: Catal. Commun., 8 (2007) 589. https://doi.org/10.1016/j.catcom.2006.05.015
  14. T. N. Angelidis and N. Kruse: Appl. Catal. B, 34 (2001) 201 https://doi.org/10.1016/S0926-3373(01)00215-6