Table 2.
Possible Mercury control technologies for the conventional coal-fired technologies in the United States and the mercury removal efficiency
| Control technologies | Mercury removal efficiency (%) | |||
|---|---|---|---|---|
| Bituminous | Sub-bituminous | Lignite | All coals | |
| Cold side ESP* | 30–40 | 0–20 | 0–10 | 0–40 |
| Cold side ESP + FGD* | 60–80 | 15–35 | 0–40 | 0–80 |
| Fabric Filter* | 40–90 | 20–75 | 0–10 | 0–90 |
| Fabric Filter + FGD* | 75–95 | 30–75 | 10–40 | 10–95 |
| FGD** | 42 | 30 | – | – |
| SCR + FGD** | 90 | 51 | – | – |
| ESP + SCR + FGD** | 90 | 66 | 44 | – |
| Coal cleaning* | 20–40 | – | – | 0–40 |