Optimization of high surface area VOx/TiO2 catalysts for low-temperature NH3-SCR for NOx abatement

Nannuzzi, Chiara; Mino, Lorenzo; Bordiga, Silvia; Pedersen, Anders H.; Houghton, Jennifer M.; Vennestrøm, Peter N. R.; Janssens, Ton V. W.; Berliera, Gloria

doi:10.1016/j.jcat.2023.03.025

Cited by 9 publications

(2 citation statements)

References 66 publications

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“…Some metal oxide-modified catalysts for the SCR method have recently been used to reduce NOx emissions (Keller et al, 2022;Nannuzzi et al, 2023). The most widely applied commercial catalysts for this process are V2O5/TiO2 and V2O5/MoO3-based catalysts, whose window reaction temperatures are between 300°C-400°C, a narrow temperature window with limited application (Chen et al, 2016;Zhang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Darmansyah,

You,

Wang

2024

Aerosol Air Qual. Res.

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Fly ash is solid waste from incinerators that contains complex compounds that have great potential to synthesize valuable materials. This study devises synthesizing a low-cost catalyst from recycled fly ash using a combination of metal oxides (ZrO2, TiO2, and MgO) to remove NOx. This study also investigated the impact of various factors on the synergetic purification of NOx as an air pollution emission. Microscopic characterization showed that increasing the composition of metal oxides can increase the specific surface area of fly ash, crystallinity, binding energy, and the dispersion of metal oxides into the fly ash, favoring the adsorption and the oxidation of NOx onto the surface-modified fly ash catalysts. The NOx removal in raw fly ash (RFA) at 25°C is 10.39%, increasing to 90.3% in the modified fly ash catalyst (FA/Zr-10%) at 250°C. The modified fly ash catalysts can reduce catalyst costs for NOx removal by one-ninth, and the operating temperature is about 10-15% lower than conventional catalysts. In summary, industrial solid waste incineration fly ash holds excellent potential when modified with metal oxides, serving as an economical and highly efficient catalyst for NOx removal.

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Section: Introductionmentioning

confidence: 99%

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Darmansyah,

You,

Wang

2024

Aerosol Air Qual. Res.

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“…Despite significant success in thermal power stations, managing NO x in nonpower sectors remains a formidable task, primarily due to the intensified interference effects from SO 2 and H 2 O at lower operating temperatures. Under typical low operating temperatures (100–200 °C), V 2 O 5 -WO 3 (MoO 3 )/TiO 2 fails to deliver adequate performance. − Consequently, there is an urgent need to develop SCR catalysts that can provide exceptional denitrification efficiency and robust tolerance to SO 2 and H 2 O within this temperature range.…”

Section: Introductionmentioning

confidence: 99%

Insights into the Acidic Site in Manganese Oxide in Terms of the Sulfur and Water Tolerance of Low-Temperature NH₃ Selective Catalytic Reduction

Li,

Zhang,

Yang

et al. 2024

Langmuir

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A critical constraint impeding the utilization of Mn-based oxide catalysts in NH 3 selective catalytic reduction (NH 3 -SCR) is their inadequate resistance to water and sulfur. This vulnerability primarily arises from the propensity of SO 2 to bind to the acidic site in manganese oxide, resulting in the formation of metal sulfate and leading to the irreversible deactivation of the catalyst. Therefore, gaining a comprehensive understanding of the detrimental impact of SO 2 on the acidic sites and elucidating the underlying mechanism of this toxicity are of paramount importance for the effective application of Mn-based catalysts in NH 3 -SCR. Herein, we strategically modulate the acidity of the manganese oxide catalyst surface through the incorporation of Ce and Nb. Comprehensive analyses, including thermogravimetry, NH 3 temperature-programmed desorption, in situ diffused reflectance infrared Fourier transform spectroscopy, and density functional theory calculations, reveal that SO 2 exhibits a propensity for adsorption at strongly acidic sites. This mechanistic understanding underscores the pivotal role of surface acidity in governing the sulfur resistance of manganese oxide.

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Commercial SCR catalyst modified with Cu metal to simultaneously efficiently remove NO and toluene in the fuel gas

Zhou

Zhang

et al. 2023

Environ Sci Pollut Res

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Optimization of high surface area VOx/TiO2 catalysts for low-temperature NH3-SCR for NOx abatement

Cited by 9 publications

References 66 publications

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Insights into the Acidic Site in Manganese Oxide in Terms of the Sulfur and Water Tolerance of Low-Temperature NH₃ Selective Catalytic Reduction

Commercial SCR catalyst modified with Cu metal to simultaneously efficiently remove NO and toluene in the fuel gas

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Optimization of high surface area VOx/TiO2 catalysts for low-temperature NH3-SCR for NOx abatement

Cited by 9 publications

References 66 publications

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Modification of Recycled Industrial Solid Waste Incineration Fly Ash as a Low-cost Catalyst for NOx Removal

Insights into the Acidic Site in Manganese Oxide in Terms of the Sulfur and Water Tolerance of Low-Temperature NH3 Selective Catalytic Reduction

Commercial SCR catalyst modified with Cu metal to simultaneously efficiently remove NO and toluene in the fuel gas

Contact Info

Product

Resources

About

Insights into the Acidic Site in Manganese Oxide in Terms of the Sulfur and Water Tolerance of Low-Temperature NH₃ Selective Catalytic Reduction