Highly dispersed Fe2O3 on carbon nanotubes for low-temperature selective catalytic reduction of NO with NH3

Qu, Zhenping; Miao, Lei; Wang, Hui; Fu, Qiang

doi:10.1039/c4cc06941b

Cited by 108 publications

(62 citation statements)

References 20 publications

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“…energy separation was 13.6 eV, which revealed the predominant formation of Fe 2 O 3 17. Moreover, according to the weak shake-up satellite (centered at 719.15 eV), an offset of 8.3 eV from the basic photoelectron lines of Fe2p 3/2 could be observed, further indicating the main generation of Fe 2 O 3 16.…”

mentioning

confidence: 89%

One-step synthesis of ternary MnO2–Fe2O3–CeO2–Ce2O3/CNT catalysts for use in low-temperature NO reduction with NH3

Zhang

Zheng

Zou

et al. 2015

Catalysis Communications

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mentioning

confidence: 89%

One-step synthesis of ternary MnO2–Fe2O3–CeO2–Ce2O3/CNT catalysts for use in low-temperature NO reduction with NH3

Zhang

Zheng

Zou

et al. 2015

Catalysis Communications

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“…There are many recent reports examining the effectiveness of LT NH 3 -SCR catalysts, such as Mn/Al 2 O 3 [8], Mn/TiO 2 [9], Mn/MWCNTs [10], Mn/Graphene [11], Fe-Mn/USY [12], Fe/ZSM-5 [13] and others [14,15]. Manganese oxides are of particular interest as catalysts since they contain various types of labile oxygen and oxidation states of manganese (Mn 2+ , Mn 3+ and Mn 4+ ), which are necessary and significant to complete a catalytic cycle [16].…”

Section: Introductionmentioning

confidence: 99%

In situ FT-IR study of highly dispersed MnO x /SAPO-34 catalyst for low-temperature selective catalytic reduction of NO x by NH 3

Huang

Dong

et al. 2017

Catalysis Today

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“…Unsupported and supported Fe 2 O 3 are still suspicious of the tolerance to SO 2 existing in flue gases, depending strongly on their preparation techniques [19,[24][25][26], but this point can be avoided for no sulfur applications, such as natural gas-fired plants. The Figure 1.…”

Section: Introductionmentioning

confidence: 99%

The Role of Fe2O3 Species in Depressing the Formation of N2O in the Selective Reduction of NO by NH3 over V2O5/TiO2-Based Catalysts

Kim

Yang

2018

Catalysts

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Promotion of 2.73% Fe 2 O 3 in an in-house-made V 2 O 5 -WO 3 /TiO 2 (VWT) and a commercial V 2 O 5 -WO 3 /TiO 2 (c-VWT) has been investigated as a cost effective approach to the suppression of N 2 O formation in the selective catalytic reduction of NO by NH 3 (NH 3 -SCR). The promoted VWT and c-VWT catalysts all gave a significantly decreased N 2 O production at temperatures >400 • C compared to the unpromoted samples. However, such a promotion led to the loss in high temperature NO conversion, mainly due to the oxidation of NH 3 to N-containing gases, particularly NO. Characterization of the unpromoted and promoted catalysts using X-ray diffraction (XRD), NH 3 adsorption-desorption, and Raman spectroscopy techniques could explain the reason why the promotion showed much lower N 2 O formation levels at high temperatures. The addition of Fe 2 O 3 to c-VWT resulted in redispersion of the V 2 O 5 species, although this was not visible for 2.73% Fe 2 O 3 /VWT. The iron oxides exist as a highly-dispersed noncrystalline α-Fe 2 O 3 in the promoted catalysts. These Raman spectra had a new Raman signal that could be tentatively assigned to Fe 2 O 3 -induced tetrahedrally coordinated polymeric vanadates and/or surface V-O-Fe species with significant electronic interactions between the both metal oxides. Calculations of the monolayer coverage of each metal oxide and the surface total coverage are reasonably consistent with Raman measurements. The proposed vanadia-based surface polymeric entities may play a key role for the substantial reduction of N 2 O formed at high temperatures by NH 3 species adsorbed strongly on the promoted catalysts. This reaction is a main pathway to greatly suppress the extent of N 2 O formation in NH 3 -SCR reaction over the promoted catalysts.

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Highly dispersed Fe₂O₃ on carbon nanotubes for low-temperature selective catalytic reduction of NO with NH₃

Abstract: Highly dispersed Fe2O3 nanoparticles supported on carbon nanotubes, prepared by a simple ethanol-assisted impregnation method, showed above 90% NO conversion and selectivity at low temperatures (200-325 °C). Moreover excellent durability and stability towards SO2/H2O was obtained.

Cited by 108 publications

References 20 publications

One-step synthesis of ternary MnO2–Fe2O3–CeO2–Ce2O3/CNT catalysts for use in low-temperature NO reduction with NH3

One-step synthesis of ternary MnO2–Fe2O3–CeO2–Ce2O3/CNT catalysts for use in low-temperature NO reduction with NH3

In situ FT-IR study of highly dispersed MnO x /SAPO-34 catalyst for low-temperature selective catalytic reduction of NO x by NH 3

The Role of Fe2O3 Species in Depressing the Formation of N2O in the Selective Reduction of NO by NH3 over V2O5/TiO2-Based Catalysts

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