Removal of SO2 from simulated flue gases using non-thermal plasma-based microgap discharge.
The removal of sulfur dioxide (SO2) from simulated flue gases streams (N2/O2/H2O/SO2) was experimentally investigated using microgap discharge. In the experiment, the thinner dielectric layers of aluminum oxide (Al2O3) were used to form the microgap discharge. With this physical method, a high concentration of hydroxyl (OH*) radicals were produced using the ionization of O2 and H2O to further the conversion of SO2 into sulfuric acid (H2SO4) at 120 degrees C in the absence of any catalysts and absorbents, which were captured with the electrostatic precipitator (ESP). As a result, the increase of discharge power and concentrations of O2 and H2O increased the production of OH. radicals resulting in enhanced removal of SO2 from gas streams. With the test and analysis, a number of H2SO4 droplets were produced in experiment. Therefore, a new method for removal of SO2 in semidry method without ammonia (NH3) additive was found.
Zhang
Zhitao
Z
Key Laboratory of Strong Electric-Field Ionization Discharge of Liaoning Province, Dalian Maritime University, Liaoning, Republic of China.
Bai
Mindong
M
Bai
Mindi
M
Bai
Xiyao
X
Pan
Qiaoyuan
Q
D000393:Air Pollutants / Q000032:analysis / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control*; D003031:Coal; D017665:Hydroxyl Radical / Q000737:chemistry*; D007220:Industrial Waste / Q000517:prevention & control; D010100:Oxygen / Q000737:chemistry; D011210:Power Plants; D013458:Sulfur Dioxide / Q000032:analysis / Q000737:chemistry*; D013464:Sulfuric Acids / Q000737:chemistry; D018505:Waste Management / Q000379:methods*; D014867:Water / Q000737:chemistry
D000393:Air Pollutants; D003031:Coal; D007220:Industrial Waste; D013464:Sulfuric Acids; D014867:Water; D013458:Sulfur Dioxide; D017665:Hydroxyl Radical; C033158:sulfuric acid; D010100:Oxygen