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Parametric Survey for Efficient DeNOx by Direct Decomposition of NO Using an Intermittent DBD Generated by a One-Cycle Sinusoidal Power Source

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NO gas is directly decomposed using an intermittent DBD plasma generated by a one cycle sinusoidal power source. Previously, we have developed an ammonia radical injection system, where ammonia radicals were produced by a dielectric barrier discharge (DBD) in a chamber, called a radical injector, which is separate from the chamber in which NO gas flows. The radicals are injected into the mixing zone in the NO gas flow field to decompose NO gas. The power source for generating the DBD is a one-cycle sinusoidal (OCS) wave-form so as to easily control the electrical power consumed in the DBD plasma. The fundamental frequency of the OCS power source is 150 kHz. In this paper, we used the same power source, but NO was decomposed directly by the plasma; that is, NO gas is in the DBD plasma. NO gas was varied from room temperature to approximately 400 C, where the effect of DeNOx characteristics were discussed. By optimizing parameters for DeNOx, an energy efficiency of 100 g/kWh was obtained.

Keywords: Dielectric Barrier Discharge; NOx; Non-thermal Plasma; SCR; SNCR; Silent Discharge

Document Type: Research Article

Affiliations: 1: Department of Electrical Engineering, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321, Japan 2: Department of Chemical Engineering and Material Science, Doshisha University, 1-3 Tatara Miyakodani, Kyotanabe, Kyoto 610-0321, Japan

Publication date: 2007-07-01

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