Fuel | Default higher heating value1 | Default CO2 emission factor (kg CO2/MMBtu) |
Natural Gas | 1.026 MMBtu/Mscf | 53.06 |
Propane | 3.84 MMBtu/bbl | 62.87 |
Normal butane | 4.34 MMBtu/bbl | 64.77 |
Ethane | 2.85 MMBtu/bbl | 59.60 |
Isobutane | 4.16 MMBtu/bbl | 64.94 |
Pentanes plus | 4.62 MMBtu/bbl | 70.02 |
1 Conditions for higher heating values presented in MMBtu/bbl are 60 °F and saturation pressure.
40 C.F.R. 98 app Table NN-1 to Subpart NN of Part 98