Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 5, 2024

The reactivation and subsequent reuse of the exhausted SCR catalyst holds significant economic environmental advantages. Water acid washing along with thermal regeneration were commonly utilized to eliminate toxic substances from surface, while these processes often resulted in undesired loss active components. In this research, an impregnation approach was adopted replenish depleted constituents spent V₂O₅-WO₃/TiO₂ (denoted as VW/Ti). Experimental investigations conducted evaluate influence Ce/P doping on both Selective Catalytic Reduction (SCR) activity rejuvenated its resistance detrimental effects SO₂/H₂O exposure. optimal performance is achieved co-doped VW/Ti catalyst, demonstrating a remarkable efficiency removing nearly 100% NO_x across broad temperature ranging 150°C 450°C. incorporation proper content Ce serves elevate VO_x surface density sub-monolayer state monolayer foster formation more oxygen vacancy. This transformation positively contributes enhancing catalytic poisoning. Further treatment H₃PO₄, although rendering susceptible H₂O, achieves delicate balance between acidity redox capabilities. optimized not only enhances catalyst's robustness but also further widens window.

Language: Английский