The removal of NO from gas streams using a plasma generated by dielectric barrier discharges is investigated experimentally. NO removal efficiencies of >95% are achieved. The removal efficiency of NO is measured as a function of NO, O2, CO2, and H2Og concentrations, as well as temperature of the gas stream. Removal of NO decreases under dry conditions with increasing O2 concentration at -24 °C due to plasma oxidation of N2. At elevated temperatures, increasing H2Og concentration and decreasing CO2 concentration result in increasing NO removal efficiencies. NO removal increases with increasing H2Og concentration due to the increase in production of OH. CO2 causes a decrease in the amount of energy deposited into the gas stream, resulting in lower NO removal efficiencies. The overall results suggest that dielectric barrier discharges have the potential as an alternative to existing postcombustion technology for the removal of NO from gas streams.
ASJC Scopus subject areas
- Environmental Chemistry