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http://dx.doi.org/10.6111/JKCGCT.2016.26.3.115

Microstructural property and catalytic activity of nano-sized MnOx-CeO2/TiO2 for NH3-SCR  

Hwang, Sungchul (Graduate School of Convergence Science, Pusan National University)
Jo, Seung-hyeon (School of Materials Science and Engineering, Pusan National University)
Shin, Min-Chul (Material & Components Technology Center, Korea Testing Laboratory)
Cha, Jinseon (Material & Components Technology Center, Korea Testing Laboratory)
Lee, Inwon (Global Core Research Center for Ships and Offshore Plants, Pusan National University)
Park, Hyun (Global Core Research Center for Ships and Offshore Plants, Pusan National University)
Lee, Heesoo (School of Materials Science and Engineering, Pusan National University)
Publication Information
Journal of the Korean Crystal Growth and Crystal Technology / v.26, no.3, 2016 , pp. 115-120 More about this Journal
Abstract
$CeO_2$ is used as a co-catalyst with $TiO_2$ to improve the catalytic activity of $MnO_x$ and characterization of nano-sized powder is identified with de-NOx efficiency. A comparison between $MnO_x-CeO_2/TiO_2$ and single $CeO_2$ was conducted in terms of microstructural analysis to observe the behavior of $CeO_2$ in the ternary catalyst. The $MnO_x-CeO_2/TiO_2$ catalyst was synthesized by sol-gel method and the average particle size of the single $CeO_2$ is about $285{\mu}m$ due to the low thermal stability, whereas the particle size $MnO_x-CeO_2/TiO_2$ is about 130 nm. The strong interaction between Ce and Ti was identified through the EDS mapping by transmission electron microscopy (TEM). The improvement about 20 % of $de-NO_x$ efficiency is observed in the low-temperature ($150^{\circ}C{\sim}250^{\circ}C$) and vigorous oxygen exchange by well-dispersed $CeO_2$ is the reason of catalytic activity improvement.
Keywords
Low temperature SCR; $MnO_x-CeO_2/TiO_2$; Microstructural property; Local atomic structure; EXAFS;
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  • Reference
1 H. Bosch and F. Janssen, Preface, Catal. Today 2 (1988) 369.   DOI
2 P.G.W.A. Kompio, A. Bruckner, F. Hipler, G. Auer, E. Loffler and W. Grunert, "A new view on the relations between tungsten and vanadium in $V_2O_5$ single bond $WO_3/TiO_2$ catalysts for the selective reduction of NO with $NH_3$", J. Catal. 286 (2012) 237.   DOI
3 R.H. Gao, D.S. Zhang, X.G. Liu, L.Y. Shi, P. Maitarad, H.R. Li, J.P. Zhang and W.G. Cao, "Enhanced catalytic performance of $V_2O_5-WO_3/Fe_2O_3/TiO_2$ microspheres for selective catalytic reduction of NO by $NH_3$", Catal. Sci. Technol. 3 (2013) 191.   DOI
4 M.M. Shafer, B.M. Toner, J.T. Overdier, J.J. Schauer, S.C. Fakra, S. Hu, J.D. Herner and A. Ayala, "Chemical speciation of vanadium in particulate matter emitted from diesel vehicles and urban atmospheric aerosols", Environ. Sci. Technol. 46 (2012) 189.   DOI
5 F. Kapteijn, L. Singoredjo, A. Andreini and J.A. Moulijn, "Activity and selectivity of pure manganese oxides in the selective catalytic reduction of nitric oxide with ammonia", Appl. Catal. B 3 (1994) 173.   DOI
6 X.W. Liu, K.B. Zhou, L. Wang, B.Y. Wang and Y.D. Li, "Oxygen vacancy clusters promoting reducibility and activity of ceria nanorods", J. Am. Chem. Soc. 13c (2009) 3140.
7 X.J. Du, D.S. Zhang, L.Y. Shi, R.H. Gao and J.P. Zhang, "Morphology dependence of catalytic properties of $Ni/CeO_2$ nanostructures for carbon dioxide reforming of methane", J. Phys. Chem. C 116 (2012) 10009.   DOI
8 C. Fang, D.S. Zhang, L.Y. Shi, R.H. Gao, H.R. Li, L.P. Ye and J.P. Zhang, "Highly dispersed $CeO_2$ on carbon nanotubes for selective catalytic reduction of NO with $NH_3$", Catal. Sci. Technol. 3 (2013) 803.   DOI
9 D.S. Zhang, L. Zhang, L.Y. Shi, C. Fang, H.R. Li, R.H. Gao, L. Huang and J.P. Zhang, "In situ supported $MnO_x-CeO_x$ on carbon nanotubes for the low-temperature selective catalytic reduction of NO with $NH_3$", Nanoscale 5 (2013) 1127.   DOI
10 G. Qi, R.T. Yang and R. Chang, "$MnO_x-CeO_2$ mixed oxides prepared by co-precipitation for selective catalytic reduction of NO with $NH_3$ at low temperatures", Appl. Catal. B 51 (2004) 93.   DOI
11 S.M. Lee, K.H. Park and S.C. Hong, "$MnO_x/CeO_2-TiO_2$ mixed oxide catalysts for the selective catalytic reduction of NO with $NH_3$ at low temperature", Chem. Eng. J. 195-196 (2012) 323.   DOI
12 L. Liu, Z. Yao, B. Liu and L. Dong, "Correlation of structural characteristics with catalytic performance of $CuO/Ce_xZr_{1-x}O_2$ catalysts for NO reduction by CO", J. Catal. 275 (2010) 45.   DOI
13 P. Esteves, Y. Wu, C. Dujardin, M.K. Dongare and P. Granger, "Ceria-zirconia mixed oxides as thermal resistant catalysts for the decomposition of nitrous oxide at high temperature", Catal. Today 176 (2011) 453.   DOI
14 J.R. Kim, K.Y. Lee, M.J. Suh and S.-K. Ihm, "Ceria-zirconia mixed oxide prepared by continuous hydrothermal synthesis in supercritical water as catalyst support", Catal. Today 185 (2012) 25.   DOI
15 P. Li, "Ce-Ti amorphous oxides for selective catalytic reduction of NO with NH3: confirmation of Ce-O-Ti active sites", Environ. Sci. Technol. 46 (2012) 9600.   DOI
16 J. Fang, H. Bao, B. He, F. Wang, D. Si, Z. Jiang, Z. Pan, S. Wei and W. Huang, "Interfacial and surface structures of $CeO_2-TiO_2$ mixed oxides", J. Phys. Chem. C 111 (2007)19078.   DOI
17 P. Li, Y. Xin, Q. Li, Z. Wang, Z. Zhang and L. Zheng, "Ce-Ti amorphous oxides for selective catalytic reduction of NO with NH3: Confirmation of Ce-O-Ti active sites", Environ. Sci. Technol. 46 (2012) 9600.   DOI
18 X. Gao, Y. Jiang, Y. Zhong, Z. Luo and K. Cen, "The activity and characterization of $CeO_2-TiO_2$ catalysts prepared by the sol-gel method for selective catalytic reduction of NO with $NH_3$", J. Hazard. Mater. 174 (2010) 734.   DOI
19 B.M. Reddy, A. Khan, Y. Yamada, T. Kobayashi, S. Loridant and J.C. Volta, "Structural characterization of $CeO_2-TiO_2$ and $V_2O_5/CeO_2-TiO_2$ catalysts by Raman and XPS techniques", J. Phys. Chem. B 107 (2003) 5162.   DOI