Plasma induced radicals from ammonia, methane and hydrogen have been i
njected into NO laden post-combustion gases to reduce pollutant concen
trations. Results of chemical kinetics modelling indicate that radical
s from ammonia, which are formed by interaction with an argon plasma s
tream, introduced into the post-combustion gases, will provide nearly
complete NO removal. Laboratory investigations have shown that molecul
ar radical reduction is capable of providing up to 94 mol% NO reductio
n. Streams of ammonia or combined ammonia/methane, which provide this
reduction, utilize a minimum input energy and yield no substantial amm
onia discharge.