Influence of CeO2 and WO3 Addition to Impregnated V2O5/TiO2 Catalysts on the Selective Catalytic Reduction of NOx with NH3

Mohammadi, Asghar; Praty, Corsin; Farzi, Ali; Soleimanzadeh, Hamid; Schwarz, Sabine; Stöger‐Pollach, Michael; Bernardi, Johannes; Penner, Simon; Niaei, Aligholi

doi:10.1007/s10562-022-04108-x

Cited by 3 publications

(1 citation statement)

References 67 publications

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“…To synthesize the V-based catalyst with higher SCR activity at a lower temperature, various oxide materials as promoters reported in previous research, such as transition metal oxides (WO 3 and MoO 3 ), , rare earth metals oxide (CeO 2 ), , and nonmetal oxides (SiO 2 ), can be activated with vanadium pentoxide. Wang et al studied that the incorporation of WO 3 into the V 2 O 5 /TiO 2 catalyst indeed enhances its Brønsted acid sites, which is crucial for improving its redox property at low temperatures.…”

Section: Introductionmentioning

confidence: 99%

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: Introductionmentioning

confidence: 99%

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 Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

Fernandes,

Silva,

Araújo

2024

Korean J. Chem. Eng.

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Estimating kinetic parameters in heterogeneous solid catalytic reaction networks is known to being a difficult task. This work aims at proposing a down-to-earth methodology to obtain kinetic parameters from numerical experiments. We present three techniques: a multivariable linear regression model, a stochastic metamodeling, and an optimized Kriging interpolator connected to a least-squares method. We consolidate the methodology in two different applications. The first one is a process with few components in two reactions from where it was possible to acquire the reaction rate equations that fitted literature data. The second one is a complex industrial reaction network. The results showed that even if the candidate proposed reaction rate equations do not fit the experiments, it is possible to construct a mathematical metamodel that conforms to the behavior of the components. Statistical tests showed that in both cases the proposed models successfully fit the experimental data.

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Advances and future directions in vanadium-based catalysts for synergistic control of nitrogen oxides and chlorinated organic compounds

Lu,

Li,

Weng

2024

Chin. Sci. Bull.

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Influence of CeO2 and WO3 Addition to Impregnated V2O5/TiO2 Catalysts on the Selective Catalytic Reduction of NOx with NH3

Cited by 3 publications

References 67 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

A Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

Advances and future directions in vanadium-based catalysts for synergistic control of nitrogen oxides and chlorinated organic compounds

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Influence of CeO2 and WO3 Addition to Impregnated V2O5/TiO2 Catalysts on the Selective Catalytic Reduction of NOx with NH3

Cited by 3 publications

References 67 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

A Systematic Technique for Kinetic Parameter Estimation in Heterogeneous Solid Catalytic Reaction Networks with Applications

Advances and future directions in vanadium-based catalysts for synergistic control of nitrogen oxides and chlorinated organic compounds

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