Complete NOx Removal Technology Using Nonequilibrium Plasma and Chemical Process. Performances of Ordinary and Barrier Type Plasma Reactors.

Yamamoto, Toshiaki; Okubo, Masaaki; Hayakawa, K.; Kitaura, Koichi

doi:10.1299/kikaib.66.646_1501

Cited by 7 publications

(1 citation statement)

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“…After oxidizing of NO into NO 2 in the plasma reactor, NO 2 molecules are reduced to N 2 in a chemical reactor filled with Na 2 SO 3 solution of 4% in concentration. The reaction for the reduction of NO 2 is as follows (13) (14) .…”

Section: Methodsmentioning

confidence: 99%

Influences of Excess Oscillation of Voltage Pulse and Discharge Mode on NO Removal Using Barrier-Type Plasma Reactor

et al. 2007

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This paper presents experimental results of NO removal from a simulated exhausted-gas using a barrier type reactor with screw electrodes subjected to polarity-reversed voltage pulses. The polarity-reversed pulse was produced by direct grounding of a charged coaxial cable because a traveling wave voltage was negatively reflected at the grounding end with a change in its polarity and then it propagated to the plasma reactor at the opposite end. Influence of cable length on NO removal was studied for two kinds of cable connection, single-connected cable and parallel-connected cables. NO removal ratio for a 50 m-long cable was lower than that for much shorter cables in both single and parallel connections when the applied voltage became high. Energy efficiency for NO removal also increased with decreasing the cable length. This was because excess discharges during the voltage oscillation caused by the large stored energy in the long cable resulted in reproduction of NO molecules. Energy efficiency was further improved by changing the discharge mode from dielectric barrier discharge (DBD) to surface discharge (SD). Energy efficiency was up to 110 g/kWh with 55% NO removal ratio and 34 g/kWh with 100% NO removal ratio by using a single 10 m-long cable in SD mode.

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Section: Methodsmentioning

confidence: 99%