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Citation: CHEN Xue-hong, ZHENG Yu-ying, FU Bin-bin, ZHENG Wei-jie. Preparation of MnO2/PoPD@PPS functional composites for low-temperature NO reduction with NH3[J]. Journal of Fuel Chemistry and Technology, ;2017, 45(12): 1514-1521. shu

Preparation of MnO2/PoPD@PPS functional composites for low-temperature NO reduction with NH3

  • College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, China

  • Corresponding author: ZHENG Yu-ying, yyzheng@fzu.edu.cn
  • Received Date: 7 August 2017
    Revised Date: 17 October 2017

    Fund Project: the Science and Technology Program of Fuzhou 2015H0016The project was supported by the Science and Technology Program of Fuzhou(2015H0016)

Figures(11)

  • A layer of manganese dioxide/poly (p-phenylenediamine) (PoPD) complex was coated on the surface of polyphenylene sulfide (PPS). First, the o-phenylenediamine (OPD) monomer was uniformly adsorbed on the surface of the PPS fiber by the effect of π-π conjugation. Then, the o-phenylenediamine was oxidized by the potassium permanganate solution to produce poly (p-phenylenediamine) coat, while the potassium permanganate was reduced to MnO2 catalyst and inserted into the poly (o-phenylenediamine) matrix. The MnO2 catalyst was firmly bonded with the PPS filter because the MnO2/PoPD complex formed by in-situ polymerization exhibited a strong bond with the PPS filter. The preparation method of MnO2/PoPD@PPS composite filter was simple. Due to the mild experimental conditions, the performance of the PPS filter media was not damaged. The structure and properties of MnO2/PoPD@PPS composite filter were studied in detail by FESEM, XPS, XRD, FT-IR and denitrification test. The results of denitration test show that the denitrification rate of MnO2/PoPD@PPS composite filter increases with the increase of KMnO4/PPS mass ratio. The optimum denitrification rate is 36%-94% at 80-180℃ with the KMnO4/PPS mass ratio of 1:1, and it is 88% at 160℃ after 10 h catalyst stability test. The XPS spectrum of Mn 2p proves that the catalyst on the composite filter is MnO2 that possesses amorphous structure observed from XRD patterns. It can be observed from the FESEM diagram that the dispersion of the MnO2 catalyst on the PPS filter is uniform.
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