We investigated the reduction of electrical energy consumption in the pulsed corona discharge process for the removal of nitrogen oxides. Hydrocarbon chemical additives used in the laboratory-scale experiment are responsible for the enhancement of the NO conversion through the chain reactions of free radicals, such as, R, RCO, RO, and others. Electrical energy consumption pet converted NO molecule has a minimum value of 17 eV when pentanol is injected. When ethylene and propylene are injected, 30 and 22 eV of electrical energy consumption are required for the conversion of a NO molecule, respectively. The ratio of the pulse-forming capacitance (C-e) to the reactor capacitance (C-R) plays an important role in the energy transfer,. efficiency to the reactor. The maximum energy transfer efficiency of approximately 72% could be obtained by the pulse-forming capacitance, which is 3.4 limes larger than the reactor capacitance; the maximum NO conversion efficiency was also observed with the same condition.