Understanding of the high hydrothermal stability of a catalyst prepared from Mn slag for low-temperature selective catalytic reduction of NO

Hua, H.; Zeng, Jiachen; Wang, Gaorong; Zhang, Jia; Liu, Qiang; Xu, Yunfeng; Qian, Guangren; Xu, Zhi Ping

doi:10.1016/j.jhazmat.2019.120935

Cited by 14 publications

(3 citation statements)

References 40 publications

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“…GGBS demonstrates good thermal stability, strong chemical stability, and comprises Al 2 O 3 , SiO 2 , and TiO 2 , accounting for %45% of its composition, making it a suitable Al 2 O 3 -SiO 2 -TiO 2 mixed carrier. [5,38,39] Mixed-supported catalysts exhibit enhanced surface acidity and wider active temperature windows compared to single-supported catalysts. [40] The research group involved in this study prepared a denitration catalyst with blast furnace slag as the carrier and loaded it with transition metals based on previous experiment section.…”

Section: Introductionmentioning

confidence: 99%

“…GGBS demonstrates good thermal stability, strong chemical stability, and comprises Al 2 O 3 , SiO 2 , and TiO 2 , accounting for ≈45% of its composition, making it a suitable Al 2 O 3 –SiO 2 –TiO 2 mixed carrier. [ 5,38,39 ] Mixed‐supported catalysts exhibit enhanced surface acidity and wider active temperature windows compared to single‐supported catalysts. [ 40 ]…”

Section: Introductionmentioning

confidence: 99%

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Preparation and Application of Slag‐Based Catalyst for Steelmaking

Zhang,

Wang,

Song

et al. 2024

steel research int.

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This study focuses on utilizing ground granulated blast furnace slag (GGBS) from a steel plant as the main raw material, with water and calcium‐based montmorillonite as binders, with manganese and alkali metal nitrates (Na, K, Mg, Ca). A series of supported denitration catalysts are prepared using the equal volume impregnation method. These catalysts are then employed in the selective catalytic reduction process to investigate their impact on denitration effectiveness. Furthermore, the mechanism of low‐temperature denitration in selective catalytic reduction is analyzed by combining catalyst activity tests and characterization techniques. The activity of catalysts is assessed through Fourier transform infrared spectrometer (FT‐IR), X‐Ray diffraction (XRD), and search engine marketing (SEM) characterization tests, along with examining its denitration and sulfur resistance capabilities to determine the denitration mechanism. Experimental results indicate that Mn–Mg/GGBS exhibit the most efficient low‐temperature denitrification effect, and it demonstrates certain sulfur resistance with a 5% Mn loading and a 3% second active component. Introducing Ce as the third active component further enhances the sulfur resistance of Mn–Mg–Ce/GGBS when loaded at 1%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Slag‐Based Catalyst for Steelmaking

Zhang,

Wang,

Song

et al. 2024

steel research int.

View full text Add to dashboard Cite

show abstract

“…The Mn based catalysts own substantial low-temperature activity, besides, the material sources are world wide access, so the catalysts have a good prospect of industrial application (Hua et al, 2020;Wu et al, 2020). In addition, as the valence state of Mn species in the catalyst increases, its SCR catalytic activity becomes better.…”

Section: Introductionmentioning

confidence: 99%

Selective Catalytic Reduction of NO With NH3 over High Purity Palygorskite-supported MnO2 with Different Crystal Structures

Zhang

Chen

et al. 2020

Aerosol Air Qual. Res.

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In order to find efficient catalysts for low-temperature selective catalytic reduction with ammonia (NH 3 -SCR), several MnO 2 with different crystal structure have been supported on high-purity palygorskite (Pal) by a hydrothermal method. The effect of MnO 2 crystal structures on the NH 3 -SCR performance of the catalysts was investigated. All catalysts were characterized by X-ray diffraction (XRD), N 2 adsorption-desorption, Raman spectrum, Thermo gravimetric analysis/Differential thermo gravimetric (TG/DTG), ammonia-temperature programmed desorption (NH 3 -TPD), hydrogen-temperature programmed reduction (H 2 -TPR), Transmission electron microscope (TEM) and X-ray energy dispersive spectroscopy (EDS) and X-ray photoelectron spectrometer (XPS). The presented results suggested that α-MnO 2 /Pal catalyst exhibit the highest catalytic activity among four type MnO 2 /Pal catalysts in the temperature range of 50-400°C, own promising stability during a 24 h continuous denitration experiment. Furthermore, the crystal structure affords α-MnO 2 /Pal with the highest specific surface area and more acidic sites, which is beneficial for the SCR reaction. It has improved the NH 3 adsorption ability and catalytic activity of the catalyst.

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Boosting NO removal performance of selective catalytic reduction with NH3 on hydrotalcite derived NiCuFe mixed oxides synthesized via urea hydrothermal method

Yang,

Wang,

et al. 2024

Reac Kinet Mech Cat

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Understanding of the high hydrothermal stability of a catalyst prepared from Mn slag for low-temperature selective catalytic reduction of NO

Cited by 14 publications

References 40 publications

Preparation and Application of Slag‐Based Catalyst for Steelmaking

Preparation and Application of Slag‐Based Catalyst for Steelmaking

Selective Catalytic Reduction of NO With NH3 over High Purity Palygorskite-supported MnO2 with Different Crystal Structures

Boosting NO removal performance of selective catalytic reduction with NH3 on hydrotalcite derived NiCuFe mixed oxides synthesized via urea hydrothermal method

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