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Selective catalytic reduction of NOx in dielectric barrier discharge plasmas

  • Q. Sun (a1), A.-M. Zhu (a1) (a2), X.-F. Yang (a1) (a2), J.-H. Niu (a1), Y. Xu (a1) (a2), Z.-M. Song (a1) and J. Liu (a1)...

Abstract

This article reports observations of significant synergistic effects between dielectric barrier discharge (DBD) plasmas and Cu-ZSM-5 catalysts for C2H4 selective reduction of NO x at 250 °C in the presence of excess oxygen by using a one-stage plasma-over-catalyst (POC) reactor. With a reactant gas mixture of 530 ppm NO, 650 ppm C2H4, 5.8% O2 in N2, GHSV = 12 000 h-1 and input discharge energy density of 155 J L-1, the pure catalytic, pure plasma-induced (discharges over fused silica pellets) and plasma-catalytic (in the POC reactor) NO x conversion percentages are 39%, 1.5% and 79%, respectively. A moderate plasma enhancement of NO x reduction by C2H4 was also observed in a two-stage plasma-followed-by-catalyst (PFC) reactor consisting of a discharge stage filled by fused silica pellets and a Cu-ZSM-5 catalyst stage.

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Selective catalytic reduction of NOx in dielectric barrier discharge plasmas

  • Q. Sun (a1), A.-M. Zhu (a1) (a2), X.-F. Yang (a1) (a2), J.-H. Niu (a1), Y. Xu (a1) (a2), Z.-M. Song (a1) and J. Liu (a1)...

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