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Vol. 26 No. 11 (2014): Vol 26 Issue 11

Copyright (c) 2014 AJC

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Behaviours of V2O5-WO3-TiO2 SCR Catalyst after Thermal Aging

https://doi.org/10.14233/ajchem.2014.15841
S.Y. Chang
Kunming University of Science and Technology, Faculty of Material Science and Engineering, Kunming, P.R. China; State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Sino-Platinum Metals Co., Ltd, Kunming, P.R. China; Kunming Sino-Platinum Metals Catalyst Co, Ltd, Kunming, P.R. China
Y.F. Huan
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Sino-Platinum Metals Co., Ltd, Kunming, P.R. China; Kunming Sino-Platinum Metals Catalyst Co, Ltd, Kunming, P.R. China
D.X. Yang
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Sino-Platinum Metals Co., Ltd, Kunming, P.R. China; Kunming Sino-Platinum Metals Catalyst Co, Ltd, Kunming, P.R. China
Y.K. Zhao
State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Kunming Sino-Platinum Metals Co., Ltd, Kunming, P.R. China; Kunming Sino-Platinum Metals Catalyst Co, Ltd, Kunming, P.R. China
J.H. Yi
Kunming University of Science and Technology, Faculty of Material Science and Engineering, Kunming, P.R. China

Corresponding Author(s) : S.Y. Chang

sychang@126.com

Asian Journal of Chemistry, Vol. 26 No. 11 (2014): Vol 26 Issue 11

Abstract

The influence of thermal aging on catalytic activity, weight loss, phase structure, surface area and pore characteristic of commercial V2O5-WO3-TiO2 selective catalytic reduction (SCR) catalyst were investigated using a fixed bed reactor, TG-DTA, XRD and nitrogen adsorption. The catalyst showed good catalytic activity and thermal stability in fresh state or aging for 50 h at 550 °C and 650 °C in air. The catalyst drastically deactivation after calcination for 50 h at 650 °C in air, the maximum conversion of NO dramatically decreased from 100 to 60 %, the light off temperature increased from 187 to 360 °C. The analysis revealed that the deactivation of catalyst was caused by three factors. Firstly, the reduction of vanadia loading was caused by the vocalization; secondly, the reduction of the active site was resulted from the interaction V2O5 with TiO2 and lastly, the changes of reaction area and pore structure were due to the phase transformation of TiO2 from anatase to rutile.

Keywords

V2O5 WO3 TiO2 Catalyst Thermal Aging
Chang, S., Huan, Y., Yang, D., Zhao, Y., & Yi, J. (2014). Behaviours of V2O5-WO3-TiO2 SCR Catalyst after Thermal Aging. Asian Journal of Chemistry, 26(11), 3144–3146. https://doi.org/10.14233/ajchem.2014.15841
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