LOW-TEMPERATURE SNCR PROCESS FOR NOX CONTROL

Results from an experimental investigation of plasma-assisted reductio n of NO to N-2 in gas streams are presented. Reduction of NO is primar ily achieved via its reaction with NH2 and NH radicals which are exter nally generated via the dissociation of NH3 with dielectric barrier di scharges. As high as 75% removal efficiency of NO is achieved at room temperature for the gas stream containing 300 ppmv NO. High temperatur es, 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 efficie ncy will also be reported. (C) 1997 Elsevier Science B.V.