Eur. Phys. J. Appl. Phys.
Volume 30, Number 2, May 2005
|Page(s)||129 - 133|
|Section||Plasma, Discharges and Processes|
|Published online||04 March 2005|
Selective catalytic reduction of NOx in dielectric barrier discharge plasmas
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University
of Technology, Dalian 116024, China
2 State Key Laboratory of Material Modification by Ion, Electron and Laser Beams, Dalian University of Technology, Dalian 116024, China
Corresponding author: email@example.com
Revised: 8 December 2004
Accepted: 17 December 2004
Published online: 4 March 2005
This article reports observations of significant synergistic effects between dielectric barrier discharge (DBD) plasmas and Cu-ZSM-5 catalysts for C2H4 selective reduction of NOx 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) NOx conversion percentages are 39%, 1.5% and 79%, respectively. A moderate plasma enhancement of NOx 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.
PACS: 52.77-j – Plasma applications
© EDP Sciences, 2005
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