Research progress on deactivation mechanism and preventive measures of V2O5-WO3 / TiO2 catalyst

Jin Jiahao; Cai Zongying; Liang Jinglong; Song Shaofei; Cao Weigang

doi:10.7513/j.issn.1004-7638.2024.04.014

Volume 45 Issue 4

Aug. 2024

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Article Navigation > IRON STEEL VANADIUM TITANIUM > 2024 > 45(4): 95-104

Jin Jiahao, Cai Zongying, Liang Jinglong, Song Shaofei, Cao Weigang. Research progress on deactivation mechanism and preventive measures of V2O5-WO3 / TiO2 catalyst[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 95-104. doi: 10.7513/j.issn.1004-7638.2024.04.014

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Jin Jiahao, Cai Zongying, Liang Jinglong, Song Shaofei, Cao Weigang. Research progress on deactivation mechanism and preventive measures of V₂O₅-WO₃ / TiO₂ catalyst[J]. IRON STEEL VANADIUM TITANIUM, 2024, 45(4): 95-104. doi: 10.7513/j.issn.1004-7638.2024.04.014

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Research progress on deactivation mechanism and preventive measures of V₂O₅-WO₃ / TiO₂ catalyst

doi: 10.7513/j.issn.1004-7638.2024.04.014

1.
College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, Hebei, China
2.
Chifengshan Gold Silver Lead Co., Ltd., Chifeng 025450, Inner Mongolia, China

Received Date: 2023-12-01
Publish Date: 2024-08-30

Abstract

Abstract

With growing global energy demand and the improvement of environmental protection requirements, selective catalytic reduction (SCR) technology has attracted considerable attention as an effective way to reduce atmospheric nitrogen oxide (NO_x) emissions. However, the vanadium-titanium-based V₂O₅-WO₃/TiO₂ SCR catalyst as the key role of SCR will encounter deactivation problems during long-term operation, which limits its practical application. Therefore, it is significant to study the deactivation mechanism and preventive measures. This paper systematically expounds on the deactivation mechanism of the catalyst and the preventive measures. The deactivation of the catalyst is mainly caused by the high-temperature environment and the dust, alkali (earth) metal, acid gas and heavy metal in the flue gas through physical or chemical action. In order to slow down the deactivation of the catalyst and prolong its service life, the preventive measures were reviewed from three aspects including pre-dust removal, catalyst modification and SCR system optimization. Studying the deactivation mechanism of the catalyst can not only make the component changes clear in the deactivation process, but also provide a basis for the inactivation prevention and the preparation of new catalyst materials. This article provides a reference for prolonging the working time of V₂O₅-WO₃/TiO₂ SCR catalyst and recovering waste SCR catalyst.
- V₂O₅-WO₃/TiO₂ catalyst,
- fouling,
- attrition,
- poisoning,
- sintering,
- deactivation,
- preventive measures

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References

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