Improvement of NO_x Removal Efficiency Assisted by Aqueous-Phase Reaction in Corona Discharge
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概要
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The influence of water vaper and water droplets on the removal efficiency of nitrogen oxide is investigated inthe pulsed positive corona discharge in atmospheric pressure air-based gas with a small amount of NO.The removal rates of both NO and NO_2 are improved by feeding water vapor into the discharge reactor since NO_2 is transformed into HNO_3 by reaction wuth OH.Feeding water droplets, particularly alkaline water droplets, gives a better NO and NO_2 removal efficiency than feeding water vapor.This might be explained by the rapid dissolution of the generated HNO_3 into water droplets. Numerical modelling by means of a rate equation is carried out to investigate the dynamic process of gas phase and aqueous phase, and the aqueous-phase reaction in water droplets.The results suggest that gas-phase HNO_3 dissolves in water droplets within short time(〜0.1s).Therefore, the efficient transformation of NO_x into gas-phase HNO_3 is a key process in the improvement of NO_x removal efficiency.Suppressing hydrogen ion concentration in water droplets by adding NH_3 or feeding alkaline water droplets improves the dissolution rate of NO_2.
- 社団法人応用物理学会の論文
- 2000-08-15
著者
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Tochikubo Fumiyoshi
Departmen Of Electrical Engineering Tokyo Metropolitan University
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DAITO Shigeo
Departmen of Electrical Engineering, Tokyo Metropolitan University
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WTANABE Tsuneo
Departmen of Electrical Engineering, Tokyo Metropolitan University
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Daito S
Tokyo Metropolitan Univ. Tokyo Jpn
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Wtanabe Tsuneo
Departmen Of Electrical Engineering Tokyo Metropolitan University
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Watanabe Tsuneo
Departmen of Electrical Engineering, Tokyo Metropolitan University
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