Citation: Qi SUN, Ai Min ZHU, Xue Feng YANG, Jin Hai NIU, Yong XU, Zhi Min SONG, Jing LIU. Plasma-catalytic Selective Reduction of NO with C₂H₄ in the Presence of Excess Oxygen[J]. Chinese Chemical Letters, ;2005, 16(6): 839-842. shu

Plasma-catalytic Selective Reduction of NO with C₂H₄ in the Presence of Excess Oxygen

Qi SUN ^1, ,
Ai Min ZHU ^1,2 ,
Xue Feng YANG ^1,2 ,
Jin Hai NIU ¹ ,
Yong XU ^1,2 ,
Zhi Min SONG ¹ ,
Jing LIU ¹

1.
Laboratory of Plasma Physical Chemistry, Dalian University of Technology, Dalian 116024;
2.
State Key Laboratory of Material Modification by Ion, Electron and Laser Beams, Dalian University of Technology, Dalian 116024

Received Date: 5 July 2004

Fund Project: The present work is supported by the National Natural Science Foundation of China (Grant No. 20077005),the National High Technology Research and Development Program ("863 Programm") of China (Grant No. 2002AA649140) and the Provincial Grants of Science and Technology of Liaoning, China (No. 20022112).

This paper 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℃ in the presence of excess oxygen by using a one-stage plasma-over-catalyst (POC) reactor.With the reactant gas mixture of 530 ppm NO, 650 ppm C₂H₄, 5.8% O₂ in N₂ and GHSV=12000 h^-1, the pure catalytic, pure plasma-induced (discharges over fused silica pellets) and plasmacatalytic (in the POC reactor) NO_x conversion are 39%, 1.5% and 79%, respectively. The in-situ optical emission spectra of the reactive systems imply some short-lived active species formed from plasma-induced and plasma-catalytic processes may be responsible to the observed synergistic effects in this one-stage POC system.
- NO_xremoval,
- selective catalytic reduction,
- non-thermal plasma,
- CuZSM-5,
- ethene,
- optical emission spectroscopy
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