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 Hgo 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 Hg0 oxidation efficiency than positive DC discharge and 12 kHz AC discharge. The discharge tooth wheel number had almost no effect on the maximum Hg0 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 Hg0 oxidation efficiency; while SO2 had a slight promoting effect on Hg0 oxidation.
Wang
Meiyan
M
School of Chemistry and Environment, Beihang University, Beijing 100191, China.
Zhu
Tianle
T
Luo
Hongjing
H
Tang
Ping
P
Li
Huan
H
D000393:Air Pollutants / Q000302:isolation & purification*; D002245:Carbon Dioxide / Q000737:chemistry; D008628:Mercury / Q000302:isolation & purification*; D009569:Nitric Oxide / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D013458:Sulfur Dioxide / Q000302:isolation & purification*
D000393:Air Pollutants; D013458:Sulfur Dioxide; D002245:Carbon Dioxide; D009569:Nitric Oxide; D008628:Mercury