Effects of H
2O, CO
2, CH
4 and C
2H
4 containing in automotive exhaust gas on NO removal by using a DC corona discharge were invistigated experimentally. In this experiment, N
2/O
2/NO mixture was used as a base gas of the simulated gas. To clarify the effect of the individual coexisting gas on NO removal, each coexisting gas was added to the base gas. The results showed that the existence of H
2O or C
2H
4 was effective for NO removal with low energy density. Also, when negative corona discharge was applied to the simulated exhaust gas (N
2/O
2/NO/H
2O/CO
2/C
2H
4 mixture), more than 90% DeNO
x was achieved. However, the by-products such as CO, O
3, HNO
3 and N
2O increased with increasing the energy density. It was found that the optimum energy density of corona discharge was about 250 J/L for DeNO
x of simulated exhaust gas.
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