40 CFR Table NN-1 to Subpart NN of Part 98
Default Factors for Calculation Methodology 1 of This Subpart
June 9, 2020
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| 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 |
1Conditions for higher heating values presented in MMBtu/bbl are 60 °F and saturation pressure.
[78 FR 71977, Nov. 29, 2013]
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