40 CFR Appendix Table NN-1 to Subpart NN of Part 98 - Default Factors for Calculation Methodology 1 of This Subpart

Table NN-1 to Subpart NN of Part 98—Default Factors for Calculation Methodology 1 of This Subpart
Fuel Default higher heating value 1 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.

[78 FR 71977, Nov. 29, 2013]