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Parameter | Data source |
CO2 Emissions from Prebake Cells (CWPB and SWPB) | |
MP: metal production (metric tons Al) | Individual facility records. |
NAC: net annual prebaked anode consumption per metric ton Al (metric tons C/metric tons Al) | Individual facility records. |
Sa: sulfur content in baked anode (percent weight) | 2.0. |
Asha: ash content in baked anode (percent weight) | 0.4. |
CO2 Emissions from Søderberg Cells (VSS and HSS) | |
MP: metal production (metric tons Al) PC: annual paste consumption (metric ton/metric ton Al) | Individual facility records. Individual facility records. |
CSM: annual emissions of cyclohexane soluble matter (kg/metric ton Al) | HSS: 4.0. |
VSS: 0.5. | |
BC: binder content of paste (percent weight) | Dry Paste: 24 |
Wet Paste: 27. | |
Sp: sulfur content of pitch (percent weight) | 0.6. |
Ashp: ash content of pitch (percent weight) | 0.2. |
Hp: hydrogen content of pitch (percent weight) | 3.3 |
Sc: sulfur content in calcined coke (percent weight) | 1.9 |
Ashc: ash content in calcined coke (percent weight) | 0.2 |
CD: carbon in skimmed dust from Søderberg cells (metric ton C/metric ton Al) | 0.01 |
CO2 Emissions From Pitch Volatiles Combustion (CWPB and SWPB) | |
CO2 Emissions from Pitch Volatiles Combustion (VSS and HSS) | |
GA: initial weight of green anodes (metric tons) | Individual facility records. |
Hw: annual hydrogen content in green anodes (metric tons) | 0.005 × GA. |
BA: annual baked anode production (metric tons) | Individual facility records. |
WT: annual waste tar collected (metric tons) | (a) 0.005 × GA. |
(a) Riedhammer furnaces | (b) insignificant. |
(b) all other furnaces. | |
CO2 Emissions From Bake Furnace Packing Materials (CWPB and SWPB) | |
PCC: annual packing coke consumption (metric tons/metric ton baked anode) | 0.015. |
BA: annual baked anode production (metric tons) | Individual facility records. |
Spc: sulfur content in packing coke (percent weight) | 2 |
Ashpc: ash content in packing coke (percent weight) | 2.5. |
[74 FR 56417 Oct. 30, 2009; 75 FR 79156 Dec. 17, 2010]