Nitric oxide decomposition in air by using nonthermal plasma processing-with additives and catalyst

Catalyst (copper coated zeolite catalyst i.e. Cu-ZSM-5) was used to enhance NO_x plasma chemical reactions. Two kinds of hydrocarbons (2-propane-1-ol, 2-propanol) were added to the synthesized flue gas before the nonthermal plasma process and their effects on NO _x removal characteristics were investigated. Enhancement effects of NO_x removal by the nonthermal plasma process with hydrocarbons as the additives were confirmed. Usually the catalyst´s working temperature is much higher than the room temperature. A catalytic reactor was installed after the plasma reactor. Catalytic effects on NO_x removal characteristics disappeared when the synthesized flue gas temperature was increased (~250°C). When the synthesized flue gas temperature was at the room temperature, about 90% NO_x removal efficiency was achieved combined with hydrocarbons, the catalytic reactor, and the pulsed discharge plasma