Performance of Dielectric Barrier Discharge Reactors on Elemental Mercury Oxidation in the Coal-Fired Flue Gas

AN Jiutao(安久涛); SHANG Kefeng(商克峰); LU Na(鲁娜); HONG Yi(洪义); JIANG Yuze(姜雨泽); LI Jie(李杰); WU Yan(吴彦)

doi:10.1088/1009-0630/16/2/12

Plasma Science and Technology > 2014 > 16(2): 155-160. > DOI: 10.1088/1009-0630/16/2/12

AN Jiutao(安久涛), SHANG Kefeng(商克峰), LU Na(鲁娜), HONG Yi(洪义), JIANG Yuze(姜雨泽), LI Jie(李杰), WU Yan(吴彦). Performance of Dielectric Barrier Discharge Reactors on Elemental Mercury Oxidation in the Coal-Fired Flue Gas[J]. Plasma Science and Technology, 2014, 16(2): 155-160. DOI: 10.1088/1009-0630/16/2/12

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Performance of Dielectric Barrier Discharge Reactors on Elemental Mercury Oxidation in the Coal-Fired Flue Gas

1 Institute of Electrostatics and Special Power, Dalian University of Technology, Dalian 116024, China 2 Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry ofEducation of the People’s Republic of China, Dalian 116024, China 3 Shandong Electric Power Research Institute, Jinan 250002, China

Funds: supported by National Natural Science Foundation of China (No.51177007) and Ministry of Science and Technology of China (No.2009AA064101-4)

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Received Date: August 20, 2013

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Abstract

Abstract

The oxidation of elemental mercury (Hg⁰ ) by dielectric barrier discharge reactors was studied at room temperature, where concentric cylinder discharge reactor (CCDR) and surface discharge plasma reactor (SDPR) were employed. The parameters (e.g. Hg ⁰ oxidation efficiency, energy constant, energy yield, energy consumption, and O₃ concentration) were discussed. From comparison of the two reactors, higher Hg⁰ oxidation efficiency and energy constant in the SDPR system were obtained by using lower specific energy density. At the same applied voltage, energy yield in the SDPR system was larger than that in the CCDR system, and energy consumption in the SDPR system was much less. Additionally, more O 3 was generated in the SDPR system. The experimental results showed that 98% of Hg⁰ oxidation efficiency, 0.6 J·L ⁻¹ of energy constant, 13.7 µg·kJ ⁻¹ of energy yield, 15.1 eV·molecule ⁻¹ of energy consumption, and 12.7 µg·J ⁻¹ of O ₃ concentration were achieved in the SDPR system. The study reveals an alternative and economical technology for Hg 0 oxidation in the coal-fired flue gas.
- surface discharge plasma reactor,
- concentric cylinder discharge reactor,
- elemental mercury,
- mercury oxidation

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References (35)

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