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

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Abstract

MnFeOx 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 MnFeOx (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 (H2-TPR) and temperature-programmed desorption by oxygen (O2-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 MnFeOx catalyst, thereby improving the activity of the catalyst. When the proportion of PEG was more than 0.3%, the catalyst was agglomerated and MnO2 was largely converted to Mn2O3. The results of H2-TPR and O2-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 O2−.

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Acknowledgements

The authors are grateful to the financial supports of the National Natural Science Foundation of China (No. 51568068) and Applied Basic Research Project of Yunnan Province (No. 2013FZ078).

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Authors and Affiliations

  1. International Joint Research Center for the Clean Utilization of Biomass Resources in the Cross-border Ethnic Regions Yunnan Province, Yunnan Minzu University, Kunming, 650500, China

    Rui Li, Bo Wu, Guoqing Ren, Kaijiao Duan & TianCheng Liu

  2. College of Chemistry Engineering, Sichuan University of Science and Engineering, Zigong, 643000, China

    Yuqin Chen

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  1. Rui Li
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  2. Bo Wu
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  4. Guoqing Ren
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Correspondence to TianCheng Liu.

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Li, R., Wu, B., Chen, Y. et al. Influence of Polyethylene Glycol on the Catalytic Activity of MnFeOx for NO Oxidation at Low-Temperature. Catal Lett 149, 1864–1873 (2019). https://doi.org/10.1007/s10562-019-02793-9

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  • DOI: https://doi.org/10.1007/s10562-019-02793-9

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