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Open AccessArticle

Study of the V2O5-WO3/TiO2 Catalyst Synthesized from Waste Catalyst on Selective Catalytic Reduction of NOx by NH3

by Chunping Qi 1,2,3, Weijun Bao 1, Liguo Wang 1, Huiquan Li 1,2,3,* and Wenfen Wu 1,2
1
Key Laboratory of Green Process and Engineering, National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100090, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
Sino-Danish Center for Education and Research, University of Chinese Academy of Sciences, Beijing 100049, China
*
Author to whom correspondence should be addressed.
This paper is an extended version of an abstract published in the 10th NCECM Conference of China, Hangzhou, China, 4–7 November 2016.
Academic Editors: Shaobin Wang, Xiaoguang Duan and Keith Hohn
Catalysts 2017, 7(4), 110; https://doi.org/10.3390/catal7040110
Received: 1 December 2016 / Revised: 16 March 2017 / Accepted: 6 April 2017 / Published: 8 April 2017
(This article belongs to the Special Issue Heterogeneous Catalysis for Environmental Remediation)
V2O5-WO3/TiO2 catalysts were synthesized from waste selective catalytic reduction (SCR) catalyst through oxalic acid leaching and impregnating with various V2O5 mass loadings. The denitration (deNOx) activity and physiochemical properties of the catalysts were investigated. All the catalysts were characterized by N2 adsorption/desorption, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and H2-temperature programmed reduction. The evaluation result revealed that the deNOx activity of newly synthesized catalyst with 1.0% V2O5 was almost recovered to the level of fresh catalyst, with NO conversion being recovered to 91% at 300 °C, and it also showed a good resistance to SO2 and H2O. The characterization results showed that the decrease of impurities, partial recovery of the V4+/V5+ ratio, and increased reducibility were mainly responsible for the recovery of catalytic activity. View Full-Text
Keywords: V2O5-WO3/TiO2 catalyst; leaching; oxalic acid; deNOx activity V2O5-WO3/TiO2 catalyst; leaching; oxalic acid; deNOx activity
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Qi, C.; Bao, W.; Wang, L.; Li, H.; Wu, W. Study of the V2O5-WO3/TiO2 Catalyst Synthesized from Waste Catalyst on Selective Catalytic Reduction of NOx by NH3. Catalysts 2017, 7, 110.

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