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Comparison of NO conversion over Cu/M (M = TiO2, Al2O3, ZSM-5, carbon nanotubes, activated carbon) catalysts assisted by plasma

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Abstract

NO conversion using dielectric barrier discharge (DBD) plasma with different catalysts was investigated. Cu/TiO2, Cu/Al2O3, Cu/ZSM-5, Cu/CNTs and Cu/AC catalysts were prepared by incipient wetness impregnation with 4 wt% Cu loaded. BET, SEM, XRD, XPS, H2-TPR, NH3-TPD were used to measure and evaluate various catalysts. Compared with the plasma only process, the combination of plasma with different catalysts significant improved the NO conversion rate. The highest NO conversion rate of 76% could be achieved with Cu/ZSM-5 catalyst at the energy density of 184 J/L. The results indicate that Cu species over the support ZSM-5 can produce high concentrations of CuO, largest specific surface area, largest amounts of acidity and lowest reduction temperature (209 °C), these factors conducive to plasma-catalyst reaction. Besides, Cu/TiO2 and Cu/Al2O3 catalysts exhibited excellent NO conversion at the low energy density because of the low thermal stability. After plasma-catalyst reaction, the reducibility of CuO and Cu2O over supports decreased and the peak position of acid sites shifted to lower temperature.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (51706069).

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Authors and Affiliations

  1. Education Ministry Key Laboratory on Condition Monitoring and Control of Power Plant Equipment, North China Electric Power University, Beijing, 102206, China

    Tao Wang, Xinyu Zhang, Jun Liu, Hanzi Liu & Baomin Sun

  2. Institute of Energy Environmental Science and Engineering, North China Electric Power University, Beijing, 102206, China

    Tao Wang

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  1. Tao Wang
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Correspondence to Tao Wang.

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Wang, T., Zhang, X., Liu, J. et al. Comparison of NO conversion over Cu/M (M = TiO2, Al2O3, ZSM-5, carbon nanotubes, activated carbon) catalysts assisted by plasma. Reac Kinet Mech Cat 124, 587–601 (2018). https://doi.org/10.1007/s11144-018-1358-4

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