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.
- polyphenylene sulfide (PPS),
- MnO₂,
- in-situ polymerization,
- NH₃-SCR
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Preparation of MnO₂/PoPD@PPS functional composites for low-temperature NO reduction with NH₃