Reduction of By-products Emission from Air-fed Ozone Generator by Homogeneous Barrier Discharge

2014 Fiscal Year Final Research Report

• Project/Area Number: 25820111
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Power engineering/Power conversion/Electric machinery
• Research Institution: Kanazawa Institute of Technology
• Principal Investigator: OSAWA Naoki 金沢工業大学, 工学部, 准教授 (40454227)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 誘電体バリア放電 / オゾン生成 / 乾燥空気原料 / 副生成物 / 窒素酸化物 / FTIRによる副生成物分析 / 放電場ガス温度測定 / 換算電界

Outline of Final Research Achievements

Ozone is a strong oxidizing agent and it can be applied to water treatment, air pollution control etc. In this work, in order to measure the NOx concentration in ozone gas generated by a homogeneous dielectric barrier discharge (APTD) in air, the method for quantitative analysis of NOx by an FTIR spectrometer with a long path gas cell (3 m) was developed, and the effects of gap length of the DBD device, gas pressure in the plasma zone and discharge modes were investigated. As the results, (1) a low reduced electric field condition, which occurred at long gap length or high gas pressure, is desirable for the reduction of N2O emission. However, it is not desirable for the efficient ozone generation. (2) The effect of 3 different discharge modes (conventional filamentary DBD, APTD and combined discharge of conventional filamentary DBD and APTD) were investigated, and the lowest N2O concentration at the same ozone concentration was achieved by the combined discharge mode.

Free Research Field

電気電子工学