Influence of Polyethylene Glycol on the Catalytic Activity of MnFeOx for NO Oxidation at Low-Temperature

MnFeO x catalysts were prepared by organic solvent method, and the effect of different proportion of polyethylene glycol (PEG) on selective catalytic oxidation (SCO) reaction performance was investigated. The results showed that the activity of the catalyst increased first and then decreased with th...

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Bibliographic Details
Published in:Catalysis letters 2019-07, Vol.149 (7), p.1864-1873
Main Authors: Li, Rui, Wu, Bo, Chen, Yuqin, Ren, Guoqing, Duan, Kaijiao, Liu, TianCheng
Format: Article
Language:English
Subjects:
Catalysis
Catalysts
Catalytic activity
Catalytic oxidation
Chemistry
Chemistry and Materials Science
Desorption
Ferromanganese
Industrial Chemistry/Chemical Engineering
Low temperature
Manganese dioxide
Organometallic Chemistry
Oxidation
Photoelectrons
Physical Chemistry
Polyethylene glycol
Pore formation
Reduction
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Summary:MnFeO x catalysts were prepared by organic solvent method, and the effect of different proportion of polyethylene glycol (PEG) on selective catalytic oxidation (SCO) reaction performance was investigated. The results showed that the activity of the catalyst increased first and then decreased with the increase of the proportion of PEG. The MnFeO x (PEG = 0.3%) catalyst had better SCO catalytic activity at low temperature. The catalyst was characterized by Brunauer–Emmett–Teller, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, temperature-programmed reduction by hydrogen (H 2 -TPR) and temperature-programmed desorption by oxygen (O 2 -TPD). The results indicated that dual function of pore-forming and stable adhesion of PEG increased the dispersion of ferromanganese oxide on the surface of the MnFeO x catalyst, thereby improving the activity of the catalyst. When the proportion of PEG was more than 0.3%, the catalyst was agglomerated and MnO 2 was largely converted to Mn 2 O 3 . The results of H 2 -TPR and O 2 -TPD tests indicated that the appropriate addition of PEG was beneficial to improve the reduction performance of the catalyst and the desorption performance of the surface chemical adsorption O 2− . Graphical Abstract
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-019-02793-9