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De-NOx Characteristics of V2O5 SCR according to the Ratio of TiO2 Crystal Structures
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 Title & Authors
De-NOx Characteristics of V2O5 SCR according to the Ratio of TiO2 Crystal Structures
Seo, Choong-Kil; Bae, Jaeyoung;
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The purpose of this study is to investigate the de-NOx performance characteristics according to the crystal structures ratio of SCR catalysts. The anatase(100%) SCR catalyst showed the highest desorption peak of 80ppm at about , and was not desorbed at . It can be confirmed that there was many desorbed at a high temperature among other various crystal structures, which is because the catalyst was more acidized to increase the intensity of acid sites as the content of subacid sulfate ions() in the rutile phase increases. The anatase/rutile(7%/93%) SCR had the smallest width of de-NOx performance drop according to thermal aging, and had strong durability against thermal aging.
Diesel engine;Catalyst;SCR;;Structure;
 Cited by
C. K. Seo, H. N. Kim, B. C. Choi, M. T. Lim, C. H. Lee and C. B. Lee, 2011, "De-NOx characteristics of a combined system of LNT and SCR catalysts according to hydrothermal aging and sulfur poisoning", Catalysis Today, Vol. 164, pp. 507-514. crossref(new window)

C. K. Seo, 2014, "The Effect of Additive Catalyst according to Thermal Aging of Vanadia SCR", Journal of Korean Society for Power System Engineering", Vol. 18, pp. 14-19.

W. S. Kang, B. C. Choi, H. N. Kim, 2013, "Characteristics of the Simultaneous Removal of PM and NOx using CuNb-ZSM-5 Coated on Diesel Particulate Filter", J. Ind. Eng. Chem. Vol. 19, pp. 1406-1412. crossref(new window)

S. Zhang, Q. Zhong, 2015, "Surface Characterization studies on the interaction of $V_2O_5-WO_3/TiO_2$ catalyst for low temperature SCR of NO with $NH_3$", J. Solid State. Chem. Vol. 231, pp. 49-56.

C. Wang, S. Yang, H. Chang, Y. Peng, J. Li, 2013, "Dispersion of tungsten oxide on SCR performance of $V_2O_5-WO_3/TiO_2$: Acidity, surface species and catalytic activity", Chem. Eng. J. Vol. 225, pp. 520-527. crossref(new window)

S. Zhang, Q. Zhong, Y. Wang, 2014, "Effect of rutile phase on $V_2O_5$ supported over $TiO_2$ mixed phase for the selective catalytic reduction of NO with $NH_3$", Appl. Surf. Sci. Vol. 314. pp. 112-118. crossref(new window)