| Electric arc (Birkeland–Eyde) |
NO (2%) |
2.4–3.1 |
26,27,51
|
| Spark discharge |
NO and NO2
|
20.27, 40 |
52,55
|
| Transient spark discharge |
NO and NO2
|
8.6 |
54
|
| Pin-to-plane ns-pulsed spark discharge |
NO and NO2
|
5.0–7.7 |
53
|
| Radio-frequency crossed discharge |
HNO3
|
24–108 |
56
|
| Laser-produced discharge |
NO and NO2
|
8.9 |
57
|
| (Positive/negative) DC corona discharge |
NO and NO2
|
1057/1673 |
52
|
| Pulsed corona discharge |
HNO3
|
186 |
58
|
| Pin-to-plane DC glow discharge |
NO and NO2
|
7 |
53
|
| Pin-to-pin DC glow discharge |
NO and NO2 (0.7%) |
2.8 |
59
|
| Dielectric barrier discharge |
NO and NO2 (0.6%) |
56–140 |
53
|
| Packed dielectric barrier discharge |
NO and NO2 (0.5%) |
18 |
36
|
| DC plasma arc jet |
NO (6.5%) |
3.6 |
60
|
| Propeller arc |
NO and NO2 (0.4%) |
4.2 |
53
|
| Pulsed milli-scale gliding arc |
NO and NO2 (1–2%) |
2.8–4.8 |
61,62
|
| Gliding arc plasmatron |
NO and NO2 (1.5%) |
3.6 |
34
|
| Rotating gliding arc |
NO and NO2 (5.4%) |
2.5 |
33
|
| Microwave plasma |
NO and NO2 (0.6%) |
3.76 |
63
|
| Microwave plasma with catalyst |
NO (6%) |
0.84 |
64
|
| Microwave plasma with magnetic field |
NO (14%) |
0.28 |
65
|
