CO2 equivalent emissions from facility subparts C-II, SS, and TT (metric tons):564,341.4
CO2 equivalent emissions from supplier subparts LL-QQ (metric tons):
Biogenic CO2 emissions from facility subparts C-II, SS, and TT (metric tons):0
Cogeneration Unit Emissions Indicator:N
GHG Report Start Date:2023-01-01
GHG Report End Date:2023-12-31
Description of Changes to Calculation Methodology:
Plant Code Indicator:N
Primary NAICS Code:331313
Second Primary NAICS Code:
Parent Company Details:
Parent Company Name:CENTURY ALUMINUM CO
Address:1 South Wacker Drive, Suite 1000,
Chicago,
IL 60606
Percent Ownership Interest:100
Subpart C: General Stationary Fuel Combustion
Gas Information Details
| Gas Name | Carbon Dioxide |
| Gas Quantity | 62,699.7 (Metric Tons) |
| Own Result? | |
| Gas Name | Biogenic Carbon dioxide |
| Gas Quantity | 0 (Metric Tons) |
| Own Result? | |
| Gas Name | Methane |
| Gas Quantity | 1.18 (Metric Tons) |
| Own Result? | |
| Gas Name | Nitrous Oxide |
| Gas Quantity | 0.118 (Metric Tons) |
| Own Result? | |
Unit Details:
Unit Name : CP-01
Unit Description :
Common Pipe Details:
Use Ivt Indicator: N
Maximum Rated Heat Input Capacity:
64
Cumulative Maximum Rated Heat Input Capacity:
316.1
Emission Details:
Annual Biogenic CO2 Emissions:
0
(metric tons)
Annual Fossil fuel based CO2 Emissions:
64900
(metric tons)
Tier Fuel Details:
Fuel :
Natural Gas (Weighted U.S. Average)
Tier Name :
Tier 2 (Equation C-2a)
Tier Methodology Start Date :
2023-01-01
Tier Methodology End Date :
2023-12-31
Frequency of HHV determinations :
Monthly
Tier 2 Monthly HHV Details :
| January | February | March | April | May | June | July | August | September | October | November | December |
|
N
|
N
|
N
|
N
|
N
|
N
|
N
|
N
|
N
|
N
|
N
|
N
|
Fuel Emission Details :
| Total CO2 emissions | Total CH4 emissions | Total N2O emissions | Total CH4 emissions CO2e | Total N2O emissions CO2e |
|
62699.7
(Metric Tons)
|
1.18
(Metric Tons)
|
0.118
(Metric Tons)
|
29.5
(Metric Tons)
|
35.2
(Metric Tons)
|
Equation C2a/C9a Inputs :
Fuel Quantity :
1104369017
(scf/year)
Use Default High Heat Value :
true
High Heat Value :
0.00107
(mmBtu/scf)
Subpart F: Aluminum Production
Gas Information Details
| Gas Name | Carbon Dioxide |
| Gas Quantity | 346,635 (Metric Tons) |
| Own Result? | |
| Gas Name | Biogenic Carbon dioxide |
| Gas Quantity | 0 (Metric Tons) |
| Own Result? | |
| Gas Name | Methane |
| Gas Quantity | 0 (Metric Tons) |
| Own Result? | |
| Gas Name | Nitrous Oxide |
| Gas Quantity | 0 (Metric Tons) |
| Own Result? | |
| Gas Name | PFC-116 (Perfluoroethane) |
| Gas CAS Registry Number | 76-16-4 |
| Gas Linear Chemical Formula | C2F6 |
| Gas Quantity | 0.9325 (Metric Tons) |
| Own Result? | |
| Gas Name | PFC-14 (Perfluoromethane) |
| Gas CAS Registry Number | 75-73-0 |
| Gas Linear Chemical Formula | CF4 |
| Gas Quantity | 19.427 (Metric Tons) |
| Own Result? | |
Facility Information
Smelter Technology Used: Center Worked Prebake
Method Used: Anode effects measurements are based on individual cell (pot) voltage signal after a threshold value is reached. Anode Effect duration is the measured accumulated time that a particular pot is over a threshold voltage value.
Months missing data procedures were followed to measure
overvoltage emission factor:
0
Months missing data procedures were followed to measure anode
effect minutes per cell day:
0
Months missing data procedures were followed to measure anode
consumption:
0
Months missing data procedures were followed to measure anode
paste consumption:
Smelter/Potline Information
Smelter/Potline Name Identifier: Century Aluminum Sebree Smelter
Description:
Annual average anode effect minutes per cell-day
(AE-mins/cell-day):
Annual average anode effect frequency (AE/cell-day):
Average anode effect duration (minutes):
Smelter-specific slope coefficient (i.e., overvoltage emission
factor) (kg CF4/metric ton Al):
0.127
Last date when the smelter-specific slope coefficients (or
overage emission factors) were measured: 2023-04-06
Smelter/Potline Information(monitored By CEMS)
CEMS Monitoring Location (CML) Details