We have applied the pulsed corona discharge process to the removal of NO From a simulated gas stream. The effect of alcoholic and aliphatic hydrocarbon additives on the oxidation of NO to NO2 was investigated, and some possible reaction schemes for the role of the additives in enhancement of NO conversion were suggested on the basis of their cracking patterns. The conversion of NO increased with the chain length of the alcohol used. In the presence of aliphatic hydrocarbon, the conversion of NO was also greatly enhanced. Comparison between alkyl alcohol or alkane and its isomer showed that alkyl alcohol or alkane gave better removal performance than its isomer. By using the alcoholic and aliphatic hydrocarbons, large reduction in energy requirement for NO removal was achieved.