| 光谱学与光谱分析 |
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| Emission Spectroscopy Diagnosis of the Radicals Generated in Gas-Liquid Phases Gliding arc Discharge |
| YAN Jian-hua, DAI Shang-li, LI Xiao-dong, TU Xin, LIU Ya-na, CEN Ke-fa |
| State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, China |
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Abstract Gas-liquid phases gliding arc discharge has been investigated as a potential treatment technology for liquid phase pollution treatment.To further understand the interaction mechanisms of gas-liquid phase gliding arc degradation process for the wastewater treatment, the characteristics of major reactive species (the OH and NO radicals) in a gas-liquid gliding arc at atmospheric pressure have been investigated by using optical emission spectroscopy.The chemical reactions that may lead to the generation of free radicals in the discharge were discussed.The influence of operating conditions (water feed rate, input voltage etc.) on the relative intensity of radical emission was studied.The results show that axial evolution of the relative emission intensity of both reactive species exhibit the similar tendency under the same operating conditions.In non-thermodynamic equilibrium region of the arc discharge, the intensities of both radicals increase with the input voltage.In addition, the intensity of OH radical increases with the water feed rate, while the opposition phenomena are observed for NO radical.
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Received: 2007-05-10
Accepted: 2007-08-20
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Corresponding Authors:
YAN Jian-hua
E-mail: yanjh@cmee.zju.edu.cn
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