Abstract
Previous results have shown that the plasma-chemical hybrid process was effective for simultaneous removal of NOx, SOx and diesel particulate. In the present study, two types of plasma supplies, the direct oxidation method and the indirect plasma oxidation (air radical injection) method, were evaluated with regard to NO and NOx removal efficiencies and applied power. The air radical injection method showed that both NO and NOx removal efficiencies were better than those the direct oxidation method even at around 1/3 applied power. Furthermore, performance parameters of NO oxidation were investigated. As a result, more than 80% of NO removal efficiency was achieved when the ratio of air radical gas to exhaust gas was in the range of 20%.
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