Browse > Article
http://dx.doi.org/10.4150/KPMI.2011.18.2.159

The Effects of Sulfate Formation and Mg Addition on the Selective Catalytic Reduction of NOx with CH4 on Ag/Al2O3 Catalysts  

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)
Publication Information
Journal of Powder Materials / v.18, no.2, 2011 , pp. 159-167 More about this Journal
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%.
Keywords
Ag/$Al_2O_3$; Sulfur poisoning; DeNOx; Selective catalytic reduction; Mg sulfate;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Y. Shi, H. Pan, Y. Zhang and W. Li: Catal. Commun., 9 (2008) 796.   DOI   ScienceOn
2 Z. Liu, J. Li and A. S. M. Junaid: Catal. Today, 153 (2010) 95.   DOI   ScienceOn
3 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.   DOI   ScienceOn
4 K. I. Shimizu, T. Higashimata, M. Tsuzuki and A. Satsuma: J. Catal., 239 (2006) 117.   DOI   ScienceOn
5 R. Ke, Q. Chen, J. Li, Y. Zhu and J. Hao: Catal. Commun., 8 (2007) 589.   DOI   ScienceOn
6 T. N. Angelidis and N. Kruse: Appl. Catal. B, 34 (2001) 201   DOI   ScienceOn
7 N. Y. Topsoe, J. A. Dumesic and H. Topsoe: J. Catal., 151 (1995) 226.   DOI   ScienceOn
8 N. Y. Topsoe, J. A. Dumesic and H. Topsoe: J. Catal., 151 (1995) 241.   DOI   ScienceOn
9 A. Miyamoto, Y. Yamazaki, M. Inomata and Y. Murakami J. Phys. Chem., 85 (1981) 2366.   DOI
10 R. Burch, J. P. Breen and F. C. Meunier: Appl. Catal. B, 39 (2002) 283.   DOI   ScienceOn
11 K. Shimizu: Phys. Chem. Chem. Phys., 8 (2006) 2677.   DOI   ScienceOn
12 F. C. Meunier, J. P. Breen, V. Zuzaniuk, M. Olsson and J. R. H. Ross: J. Catal., 187 (1999) 493.   DOI   ScienceOn
13 X. She and M. Flytzani-Stephanopoulos: Catal. Today, 127 (2007) 207.   DOI   ScienceOn
14 http://en.wikipedia.org/wiki/Standard_enthalpy_of_formation