Influence of oxygen and water vapor on removal of sulfur compounds by electron attachment

Influence of Temperature on SO2 Removal Enhanced by Water Vapor Using a Corona-Discharge Reactor

“…3 that the removal efficiency shows significant enhancement in the presence of water vapor. This result is consistent with a previous article [7]. It is interesting that the enhancement effect by water vapor on SO 2 removal decreased as the reactor temperature rose.…”

“…If a detectable concentration of some unknown sulfur compound had been produced as a reaction byproduct, a TCD peak should have appeared with the GC column used in this study [6,7]. Then W defined here represents the removal efficiency of the total sulfur.…”

Temperature Effect on Removal of Sulfur Dioxide and Benzene in Humid Air by DC Corona Discharge

“…Furthermore, the negative ions produced by the corona discharge undergo interactions with gas species, resulting in the formation of ion clusters or aerosols. If such ion clusters and aerosols could deposit on the anode surface, the electrons emitted by the corona discharge would exhibit high efficiency for gas purification because the clusters and the aerosols contain numerous molecules of the removed species per unit charge [4,7]. In addition to the ionic reactions above, reactive radicals produced by electron impact to gas molecules may play a role in the decomposition of the target gases.…”

High-temperature simultaneous removal of acetaldehyde and ammonia gases using corona discharge

“…The reversed electron detachment process, however, becomes significant at high temperature, causing ion clusters to become unstable [22]. The previous articles indicate that the corona discharge reactor plays host to electron attachment reactions and relevant ion cluster formation at room temperature [4,6]. However, because of high temperature effects such as electron detachment and radical formation, electron attachment and ion clustering would be less and less important as the temperature rises.…”

“…The resulting negative ions drift to the anode and deposit on it. Previous studies have revealed that gases of high electron affinity, for example, sulfur compounds, halogens, malodorous gases, VOCs and CFCs are Science selectively removed by the proposed method [1][2][3][4][5][6][7][8]. Though acetaldehyde and ammonia are emitted at high temperature from a crematory furnace [9][10][11], there are insufficient reports on the effect of high temperature and simultaneous removal.…”