New insight into vanadium phosphorus oxides (VPO/TiO2) catalysts for NO  removal with NH3-SCR at low temperature: Relationship between non-VO  phases and SO2&amp;H2O resistance

Jiang, Jin He; Guo, Li‐Na; Yuan, Jing; Meng, Fanyu; Wang, Zhongming; Qian, Fucai; Zhang, Shule; Zeng, Yiqing; Jia, Yong; Gu, Mingyan

doi:10.1016/j.fuel.2023.128780

Cited by 7 publications

(2 citation statements)

References 66 publications

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“…Conversely, the bands located at 1604 and 1404 cm –1 belonged to pyridine bonded on Lewis acid sites . Correspondingly, the band at 1490 cm –1 represented the combined adsorption of pyridine onto both Lewis and Brønsted acid sites . Combined with the Py-IR result, it is clear to classify acid sites, revealing the significance of Brønsted acid.…”

Section: Resultsmentioning

confidence: 84%

“…42 Correspondingly, the band at 1490 cm −1 represented the combined adsorption of pyridine onto both Lewis and Brønsted acid sites. 43 Combined with the Py-IR result, it is clear to classify acid sites, revealing the significance of Brønsted acid. Overall, the surface acidity of the VMoTi catalyst, prepared under relatively low calcination conditions, was significantly enhanced, thereby augmenting its adsorption capacity for NH 3 .…”

Section: Catalyst Characterizationmentioning

confidence: 95%

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Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NO_x with NH₃

Wang,

Lin,

Xiao

2024

Ind. Eng. Chem. Res.

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A coprecipitation approach was used to prepare vanadium−molybdenum composite oxide catalysts, which were then calcined at 300, 400, 500, 600, and 700 °C. The vanadium− molybdenum catalyst, under calcination at 500 °C, possesses abundant surface defects and acid species. As a result, it showed an outstanding active window, achieving over 90% NO x conversion efficiency within the temperature range of 220−340 °C. Compared with other catalysts, the vanadium−molybdenum catalyst with the calcination at 500 °C resulted in the formation of polymeric vanadate with the most active oxygen, which was conducive to the high catalytic efficiency for the NH 3 -SCR reaction. Based on our indepth understanding gained from in situ DRIFTS experiments, we proposed that the NH 3 -SCR reaction occurred on the vanadium− molybdenum catalyst via an Eley−Rideal pathway. This mechanism involves the initial adsorption of ammonia on the catalytic surface, followed by its interaction with weakly adsorbed or gaseous NO to form an activated complex. Furthermore, the presence of molecular oxygen (O 2 ) serves to augment the adsorption and activation of nitric oxide over the catalytic surface. The augmentation arises from the generation of adsorbed NO 2 species or nitrates, which possess pronounced oxidizing capabilities. Notably, the significant impact of NH 3 and NO in the denitration reaction was elucidated, providing valuable insights that can guide the adjustment and optimization of practical operational conditions. This understanding is crucial for enhancing the efficiency and effectiveness of the denitration process, thereby contributing to improved environmental qualities.

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Section: Resultsmentioning

confidence: 84%

Section: Catalyst Characterizationmentioning

confidence: 95%

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NO_x with NH₃

Wang,

Lin,

Xiao

2024

Ind. Eng. Chem. Res.

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Highly active and stable VOx/TiO2 nanosheets for low-temperature NH3-SCR of NO: Structure-directing role of support

Lin,

Wang,

Liu

2024

Chemical Engineering Journal

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High-temperature selective reduction of NOx into N2 catalyzed by different ion-doped titania

Wang,

et al. 2024

Chemical Engineering Journal

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New insight into vanadium phosphorus oxides (VPO/TiO2) catalysts for NO removal with NH3-SCR at low temperature: Relationship between non-VO phases and SO2&H2O resistance

Cited by 7 publications

References 66 publications

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NO_x with NH₃

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NO_x with NH₃

Highly active and stable VOx/TiO2 nanosheets for low-temperature NH3-SCR of NO: Structure-directing role of support

High-temperature selective reduction of NOx into N2 catalyzed by different ion-doped titania

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New insight into vanadium phosphorus oxides (VPO/TiO2) catalysts for NO removal with NH3-SCR at low temperature: Relationship between non-VO phases and SO2&H2O resistance

Cited by 7 publications

References 66 publications

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NOx with NH3

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NOx with NH3

Highly active and stable VOx/TiO2 nanosheets for low-temperature NH3-SCR of NO: Structure-directing role of support

High-temperature selective reduction of NOx into N2 catalyzed by different ion-doped titania

Contact Info

Product

Resources

About

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NO_x with NH₃

Influence of Calcination Temperature over Vanadium–Molybdenum Catalysts for the Selective Catalytic Reduction of NO_x with NH₃