Low temperature SNCR process for NOx control

Results from an experimental investigation of plasma-assisted reduction of NO to N-2 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. (C) 1997 Elsevier Science B.V.