Low temperature SNCR process for NO(x) control

Results from an experimental investigation of plasma-assisted reduction of NO to N₂ in gas streams are presented. Reduction of NO is primarily achieved via its reaction with NH₂ and NH radicals which are externally generated via the dissociation of NH₃ with dielectric barrier discharges. As high as 75% removal efficiency of NO is achieved at room temperature for the gas stream containing 300 ppmv NO. High temperatures, essential for conventional selective noncatalytic reduction (SNCR) to be effective, can be greatly reduced using this technique. Effects of NH₃ to NO molar ratio and oxygen content on the NO removal efficiency will also be reported.