Assumptions to the Annual Energy Outlook 2003

Table  2.    Carbon Dioxide Emission Factors
                   (Kilograms-carbon equivalent per million Btu)

 

  Fuel Type

Carbon Dioxide  Coefficient
at Full Combustion

Combustion
Fraction

Adjusted Emissions
Factor

Petroleum

     

Motor Gasoline

19.34

0.990

19.15

Liquefied Petroleum Gas      

   Used as Fuel

17.18

0.995

17.09

   Used as Feedstock

16.87

0.200

3.37

Jet Fuel

19.33

0.990

19.14

   Distillate Fuel

19.95

0.990

19.75

   Residual Fuel

21.49

0.990

21.28

   Asphalt and Road Oil

20.62

0.000

0.00

   Lubricants

20.24

0.600

12.14

   Petrochemical Feedstocks

19.37

0.200

3.87

   Kerosene

19.72

0.990

19.52

   Petroleum Coke

27.85

0.500

13.93

   Petroleum Still Gas

17.51

0.995

17.42

   Other Industrial

20.31

0.990

20.11

       

Coal

     

Residential and Commercial

26.00

0.990

25.74

Metallurgical

25.56

0.990

25.30

Industrial Other

25.63

0.990

25.38

Electric Utility1

25.76

0.990

25.50

       

Natural Gas

     

Used as Fuel

14.47

0.995

14.40

Used as Feedstocks

14.47

0.774

11.20

1Emission factors for coal used for electricity generation are specified by coal supply region and types of coal, so the average carbon dioxide contents for coal varies throughout the forecast.  The 2000 average is 25.50.

Source:  Energy Information Administration, Emissions of Greenhouse Gases in the United States 2000, DOE/EIA-0573(2000), (Washington, DC, November 2001).