Oxidation of gaseous elemental mercury in a high voltage discharge reactor

Effects of the voltage waveform, discharge tooth wheel number and CO2/NO/SO2 concentration in the simulated flue gas on Hg^0 oxidation were investigated using a link tooth wheel-cylinder reactor energized by different high voltage power supplies. Negative DC discharge induced more ozone production a...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2009, Vol.21 (12), p.1652-1657
Main Authors: WANG, Meiyan, ZHU, Tianle, LUO, Hongjing, TANG, Ping, LI, Huan
Format: Article
Language:English
Subjects:
Air Pollutants - isolation & purification
Carbon Dioxide - chemistry
flue gas
Hg 0
Mercury - isolation & purification
Nitric Oxide - isolation & purification
oxidation
Oxidation-Reduction
plasma
SO2浓度
Sulfur Dioxide - isolation & purification
放电反应器
气态汞
氧化效率
电压波形
直流放电
高压电源
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Summary:Effects of the voltage waveform, discharge tooth wheel number and CO2/NO/SO2 concentration in the simulated flue gas on Hg^0 oxidation were investigated using a link tooth wheel-cylinder reactor energized by different high voltage power supplies. Negative DC discharge induced more ozone production and a higher Hg^0 oxidation efficiency than positive DC discharge and 12 kHz AC discharge. The discharge tooth wheel number had almost no effect on the maximum Hg^0 oxidation efficiency. The allowable supplied voltage decreased with the increase of discharge tooth wheel number. CO2 could stabilize the discharge process and increase the maximum voltage for a stable discharge. It has also been found that NO consumed O3 induced by high voltage discharge, thereby decreased Hg^0 oxidation efficiency; while SO2 had a slight promoting effect on Hg^0 oxidation.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(08)62469-9