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Selective catalytic reduction of NOx in dielectric barrier discharge plasmas

Published online by Cambridge University Press:  04 March 2005

Q. Sun ,
A.-M. Zhu ,
X.-F. Yang ,
J.-H. Niu ,
Y. Xu ,
Z.-M. Song  and
J. Liu
Q. Sun
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China
A.-M. Zhu
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Material Modification by Ion, Electron and Laser Beams, Dalian University of Technology, Dalian 116024, China
X.-F. Yang*
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Material Modification by Ion, Electron and Laser Beams, Dalian University of Technology, Dalian 116024, China
J.-H. Niu
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China
Y. Xu
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China State Key Laboratory of Material Modification by Ion, Electron and Laser Beams, Dalian University of Technology, Dalian 116024, China
Z.-M. Song
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China
J. Liu
Affiliation:
Laboratory of Plasma Physical Chemistry, Box 288, Dalian University of Technology, Dalian 116024, China
*
labplpc@dlut.edu.cn
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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 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.

Keywords

Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 30 , Issue 2 , May 2005 , pp. 129 - 133
Copyright
© EDP Sciences, 2005

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