1. Regulations
  2. title 40
  3. chapter I-i22
  4. part 98
  5. subpart NN
  6. appendix

- Table NN-1 to Subpart NN of Part 98—Default Factors for Calculation Methodology 1 of This Subpart

Fuel Default higher heating value 1Default CO2
emission
factor
(kg CO2/MMBtu) 		Natural Gas1.026 MMBtu/Mscf53.06 Propane3.84 MMBtu/bbl62.87 Normal butane4.34 MMBtu/bbl64.77 Ethane2.85 MMBtu/bbl59.60 Isobutane4.16 MMBtu/bbl64.94 Pentanes plus4.62 MMBtu/bbl70.02

1 Conditions for higher heating values presented in MMBtu/bbl are 60 °F and saturation pressure.

[78 FR 71977, Nov. 29, 2013]

AUTHORITY: 42 U.S.C. 7401-7671q.

SOURCE: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.