40 CFR Table F-2 to Subpart F of Part 98: Table F-2 to Subpart F of Part 98—Default Data Sources for Parameters Used for CO2 Emissions

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 Pitch Volatiles Combustion (CWPB and SWPB)

MP: metal production (metric tons Al) Individual facility records.

PC: annual paste consumption (metric ton/metric ton Al) 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 (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.