Table 5. Coal Plant Configurations, Emissions Modification Factors, and Mercury Control Options
|
Plant Configuration |
Emissions Modification Factors (Fraction Remaining) by Coal Rank |
Hg Control Option Available |
|||||||
|---|---|---|---|---|---|---|---|---|---|
|
SO2 Control |
Particulate |
SCR |
Combined |
||||||
|
SO2 Control |
Particulate Control |
SCR |
Subbituminous/ Other |
Bituminous |
All Coal Ranks |
All Coal Ranks |
Subbituminous/ Other |
Bituminous |
|
|
None |
BH |
NA |
1.00 |
1.00 |
0.31 |
1.00 |
0.288 |
0.288 |
Injection |
|
None |
BH |
NA |
1.00 |
1.00 |
0.31 |
1.00 |
0.288 |
0.288 |
Injection/SC |
|
Wet |
BH |
No |
0.81 |
0.34 |
0.31 |
1.00 |
0.234 |
0.098 |
Injection |
|
Wet |
BH |
No |
0.81 |
0.34 |
0.31 |
1.00 |
0.234 |
0.098 |
Injection/SC |
|
Wet |
BH |
Yes |
0.81 |
0.34 |
0.31 |
0.65a |
0.152 |
0.064 |
Injection |
|
Wet |
BH |
Yes |
0.81 |
0.34 |
0.31 |
0.65a |
0.152 |
0.064 |
Injection/SC |
|
Dry |
BH |
NA |
0.61 |
0.61 |
1.00 |
1.00 |
0.567 |
0.567 |
Injection |
|
Dry |
BH |
NA |
0.61 |
0.61 |
1.00 |
1.00 |
0.567 |
0.567 |
Injection/SC |
|
None |
CSE |
NA |
1.00 |
1.00 |
0.69 |
1.00 |
0.642 |
0.642 |
Injection |
|
None |
CSE |
NA |
1.00 |
1.00 |
0.69 |
1.00 |
0.642 |
0.642 |
Injection/FF |
|
None |
CSE |
NA |
1.00 |
1.00 |
0.69 |
1.00 |
0.642 |
0.642 |
Injection/SC/FF |
|
Wet |
CSE |
No |
0.81 |
0.34 |
0.69 |
1.00 |
0.520 |
0.218 |
Injection |
|
Wet |
CSE |
No |
0.81 |
0.34 |
0.69 |
1.00 |
0.520 |
0.218 |
Injection/FF |
|
Wet |
CSE |
No |
0.81 |
0.34 |
0.69 |
1.00 |
0.520 |
0.218 |
Injection/SC/FF |
|
Wet |
CSE |
Yes |
0.81 |
0.34 |
0.69 |
0.65a |
0.338 |
0.142 |
Injection |
|
Wet |
CSE |
Yes |
0.81 |
0.34 |
0.69 |
0.65a |
0.338 |
0.142 |
Injection/FF |
|
Wet |
CSE |
Yes |
0.81 |
0.34 |
0.69 |
0.65a |
0.338 |
0.142 |
Injection/SC/FF |
|
Dry |
CSE |
NA |
0.61 |
0.61 |
1.00b |
1.00 |
0.567 |
0.567 |
Injection |
|
Dry |
CSE |
NA |
0.61 |
0.61 |
1.00b |
1.00 |
0.567 |
0.567 |
Injection/SC/FF |
|
Dry |
CSE |
NA |
0.61 |
0.61 |
1.00b |
1.00 |
0.567 |
0.567 |
Injection/FF |
|
None |
HSE/Other |
NA |
1.00 |
1.00 |
1.00 |
1.00 |
0.930 |
0.930 |
None |
|
None |
HSE/Other |
NA |
1.00 |
1.00 |
1.00 |
1.00 |
0.930 |
0.930 |
Injection/FF |
|
None |
HSE/Other |
NA |
1.00 |
1.00 |
1.00 |
1.00 |
0.930 |
0.930 |
Injection/SC/FF |
|
Wet |
HSE/Other |
No |
0.81 |
0.34 |
1.00 |
1.00 |
0.753 |
0.316 |
None |
|
Wet |
HSE/Other |
No |
0.81 |
0.34 |
1.00 |
1.00 |
0.753 |
0.316 |
Injection/FF |
|
Wet |
HSE/Other |
No |
0.81 |
0.34 |
1.00 |
1.00 |
0.753 |
0.316 |
Injection/SC/FF |
|
Wet |
HSE/Other |
Yes |
0.81 |
0.34 |
1.00 |
0.65a |
0.490 |
0.206 |
None |
|
Wet |
HSE/Other |
Yes |
0.81 |
0.34 |
1.00 |
0.65a |
0.490 |
0.206 |
Injection/FF |
|
Wet |
HSE/Other |
Yes |
0.81 |
0.34 |
1.00 |
0.65a |
0.490 |
0.206 |
Injection/SC/FF |
|
Dry |
HSE/Other |
NA |
0.61 |
0.61 |
1.00 |
1.00 |
0.567 |
0.567 |
None |
|
Dry |
HSE/Other |
NA |
0.61 |
0.61 |
1.00 |
1.00 |
0.567 |
0.567 |
Injection/FF |
|
Dry |
HSE/Other |
NA |
0.61 |
0.61 |
1.00 |
1.00 |
0.567 |
0.567 |
Injection/SC/FF |
|
aSCRs are assumed to reduce Hg emissions only when combined with a wet scrubber designed to remove SO2. bCSEs do not remove additional Hg when combined with a dry scrubber. Notes: BH = bag house, CSE = cold side electrostatic precipitator, FF = fabric filter, HSE = hot side electrostatic precipitator, SC = spray cooler, SCR = selective catalytic reduction. NA = not applicable. An emissions modification factor (EMF) of 0.93 is assumed for all boiler configurations and is incorporated in the derivation of the combined EMFs. Source: Energy Information Administration, Office of Integrated Analysis and Forecasting. |
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