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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]

['Air Programs']
['Greenhouse Gases']
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