Title :
The influence of reaction conditions on SO2 oxidation in a discharge plasma reactor
Author :
Kim, Hyun Ha ; Wu, Chunxi ; Kinoshita, Youhei ; Takashima, Kazunori ; Katsura, Shinji ; Mizuno, Akira
Author_Institution :
Dept. of Ecological Eng., Toyohashi Univ. of Technol., Japan
Abstract :
In this paper, experimental approaches have been carried out to investigate the removal of sulfur dioxide (SO2) using pulsed discharge nonthermal plasma in the absence of ammonia (NH3). The gas-phase reaction was found to be less attractive due to its large energy cost. The increase in temperature decreased the SO2 removal rate, resulting in large energy cost. SO2 removal was increased as the concentration of water vapor increased. The presence of SO2 did not influence the gas-phase removal of NO in an NO-SO 2-O2-H2O-N2 system. In the case of the wet-type plasma reactor, gas-phase discharge plasma directed to the surface of water film greatly enhanced the liquid-phase oxidation of HSO3- to SO42-. Comparing the results with different absorbents indicated that the hydroxyl (OH) radical plays a key role in the plasma induced liquid-phase reactions
Keywords :
air pollution control; oxidation; plasma chemistry; plasma devices; plasma materials processing; sulphur compounds; HSO3; HSO3-; NO-SO2-O2-H2O-N2; NO-SO2-O2-H2O-N2 system; OH; OH radical; SO2; SO2 oxidation; SO2 removal; SO4; SO42-; absorbents; air pollution control; discharge plasma reactor; gas-phase discharge plasma; gas-phase reaction; hydroxyl radical; liquid-phase oxidation; plasma induced liquid-phase reactions; pulsed discharge nonthermal plasma; reaction conditions; temperature increase; water film surface; water vapor concentration increase; wet-type plasma reactor; Chemical technology; Corona; Costs; Inductors; Industry Applications Society; Oxidation; Plasma applications; Plasma temperature; Power engineering and energy; Surface discharges;
Journal_Title :
Industry Applications, IEEE Transactions on
