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Overview of mechanisms of Fe-based catalysts for the selective catalytic reduction of NOx with NH3 at low temperature

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Abstract

With the increasingly stringent control of NOx emissions, NH3-SCR, one of the most effective de-NOx technologies for removing NOx, has been widely employed to eliminate NOx from automobile exhaust and industrial production. Researchers have favored iron-based catalysts for their low cost, high activity, and excellent de-NOx performance. This paper takes a new perspective to review the research progress of iron-based catalysts. The influence of the chemical form of single iron-based catalysts on their performance was investigated. In the section on composite iron-based catalysts, detailed reviews were conducted on the effects of synergistic interactions between iron and other elements on catalytic performance. Regarding loaded iron-based catalysts, the catalytic performance of iron-based catalysts on different carriers was systematically examined. In the section on iron-based catalysts with novel structures, the effects of the morphology and crystallinity of nanomaterials on catalytic performance were analyzed. Additionally, the reaction mechanism and poisoning mechanism of iron-based catalysts were elucidated. In conclusion, the paper delved into the prospects and future directions of iron-based catalysts, aiming to provide ideas for the development of iron-based catalysts with better application prospects. The comprehensive review underscores the significance of iron-based catalysts in the realm of de-NOx technologies, shedding light on their diverse forms and applications. The hope is that this paper will serve as a valuable resource, guiding future endeavors in the development of advanced iron-based catalysts.

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Abbreviations

AI:

Aqueous ion

AM:

Adsorption method

BET:

Brunauer-Emmett-Teller

DRIFTS:

Diffuse reflectance infrared Fourier transform spectroscopy

FTIR:

Fourier transform infrared spectroscopy

GHSV:

Gas hourly space velocity

HI:

Hydrothermal ion

LPAM:

Liquid phase absorption method

NH3-SCR:

NH3 selective catalytic reduction

NMR:

Nuclear magnetic resonance

OAM:

Oxidation absorption method

SCR:

Selective catalytic reduction

SI:

Solid-state ion

SNCR:

Selective non-catalytic reduction

TEM:

Transmission electron microscopy

TG:

Thermogravimetry

TPR:

Temperature-programmed reduction

XAS:

X-ray absorption spectroscopy

XPS:

X-ray photoelectron spectroscopy

XRD:

X-ray diffraction

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Funding

This work is funded by the National Nature Science Foundation of China under the research grant of No. 22262005. This research is also funded by the Guangxi University of Science and Technology Doctoral Fund under the research grant of 13Z10.

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Authors and Affiliations

Authors

Contributions

Jianbin Luo (first author): methodology, writing-review and editing, supervision, investigation; Song Xu: resources, project administration, method, software, data curation, writing-original draft, writing-review and editing; Hongxiang Xu: project administration, method; Mingsen Li: project administration, method; Yuanhao Tie: investigation method; Haiguo Zhang: software, formal analysis; Xiaofeng Chen: software, formal analysis; Guiguang Chen: data curation, writing-review and editing; Chunmei Jiang: data curation, writing-review and editing; Zhiqing Zhang (Corresponding author): conceptualization, methodology, resources, writing original draft.

Corresponding author

Correspondence to Zhiqing Zhang.

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Responsible Editor: George Z. Kyzas

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Luo, J., Xu, S., Xu, H. et al. Overview of mechanisms of Fe-based catalysts for the selective catalytic reduction of NOx with NH3 at low temperature. Environ Sci Pollut Res 31, 14424–14465 (2024). https://doi.org/10.1007/s11356-024-32113-7

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  • DOI: https://doi.org/10.1007/s11356-024-32113-7

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