NH3-selective catalytic reduction performance of a new type of Cu@ZIF-7 catalyst

To achieve a selective catalytic reduction of nitrogen oxide (NOx) in a wide temperature range and avoid the secondary pollution of commercial catalysts, a new type of highly active catalyst Cu@ZIF-7 was synthesized. X-ray diffraction, x-ray photoelectron spectroscopy, and scanning electron microsco...

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Bibliographic Details
Published in:AIP advances 2022-02, Vol.12 (2), p.025113-025113-9
Main Authors: Zhao, Yi, Sun, Zhonghao, Liu, Siqi, Li, Zhao, Mao, Xingzhou, Wang, Siyuan, Hao, Runlong
Format: Article
Language:English
Subjects:
Ammonia
Catalysts
Chemical reduction
Chemical synthesis
Fourier transforms
Impregnation
Infrared spectroscopy
Nitrogen oxides
Photoelectrons
Selective catalytic reduction
Spectrum analysis
Water resistance
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Summary:To achieve a selective catalytic reduction of nitrogen oxide (NOx) in a wide temperature range and avoid the secondary pollution of commercial catalysts, a new type of highly active catalyst Cu@ZIF-7 was synthesized. X-ray diffraction, x-ray photoelectron spectroscopy, and scanning electron microscopy were performed to analyze the morphological characteristics of Cu@ZIF-7. The effects of Cu load capacity, impregnation time, impregnation temperature, catalyst dosage, and reaction temperature on NOx removal efficiency were also investigated. Cu@ZIF-7 maintained a NOx removal efficiency of >90% in a temperature range of 250–400 °C. Finally, the stability, sulfur, and water resistance of Cu@ZIF-7 were investigated, and the NOx conversion mechanism was inferred through in situ diffuse reflectance infrared Fourier transform spectroscopy and references.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0082307