ELECTRONIC CODE OF FEDERAL REGULATIONS

e-CFR Data is current as of February 26, 2014

Title 40: Protection of Environment 

PART 98—MANDATORY GREENHOUSE GAS REPORTING 

Subpart C—General Stationary Fuel Combustion Sources

TABLE C-1 TO SUBPART C OF PART 98—DEFAULT CO2 EMISSION FACTORS AND HIGH HEAT VALUES

FOR VARIOUS TYPES OF FUEL

DEFAULT CO2 EMISSION FACTORS AND HIGH HEAT VALUES FOR VARIOUS TYPES OF FUEL

Fuel type Default high heat value

Default CO2

emission 

factor

Coal and coke mmBtu/short ton kg CO2/mmBtu

Anthracite 25.09 103.69

Bituminous 24.93 93.28

Subbituminous 17.25 97.17

Lignite 14.21 97.72

Coal Coke 24.80 113.67

Mixed (Commercial sector) 21.39 94.27

Mixed (Industrial coking) 26.28 93.90

Mixed (Industrial sector) 22.35 94.67

Mixed (Electric Power sector) 19.73 95.52

Natural gas mmBtu/scf kg CO2/mmBtu

(Weighted U.S. Average) 1.026 × 10−3 53.06

Petroleum products mmBtu/gallon kg CO2/mmBtu

Distillate Fuel Oil No. 1 0.139 73.25

Distillate Fuel Oil No. 2 0.138 73.96

Distillate Fuel Oil No. 4 0.146 75.04

Residual Fuel Oil No. 5 0.140 72.93

Residual Fuel Oil No. 6 0.150 75.10

Used Oil 0.138 74.00

Kerosene 0.135 75.20

Liquefied petroleum gases (LPG)1 0.092 61.71

Propane1 0.091 62.87

Propylene2 0.091 67.77

Ethane1 0.068 59.60

Ethanol 0.084 68.44

Ethylene2 0.058 65.96

Isobutane1 0.099 64.94

Isobutylene1 0.103 68.86

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Butane1 0.103 64.77

Butylene1 0.105 68.72

Naphtha (<401 deg F) 0.125 68.02

Natural Gasoline 0.110 66.88

Other Oil (>401 deg F) 0.139 76.22

Pentanes Plus 0.110 70.02

Petrochemical Feedstocks 0.125 71.02

Petroleum Coke 0.143 102.41

Special Naphtha 0.125 72.34

Unfinished Oils 0.139 74.54

Heavy Gas Oils 0.148 74.92

Lubricants 0.144 74.27

Motor Gasoline 0.125 70.22

Aviation Gasoline 0.120 69.25

Kerosene-Type Jet Fuel 0.135 72.22

Asphalt and Road Oil 0.158 75.36

Crude Oil 0.138 74.54

Other fuels—solid mmBtu/short ton kg CO2/mmBtu

Municipal Solid Waste 9.953 90.7

Tires 28.00 85.97

Plastics 38.00 75.00

Petroleum Coke 30.00 102.41

Other fuels—gaseous mmBtu/scf kg CO2/mmBtu

Blast Furnace Gas 0.092 × 10−3 274.32

Coke Oven Gas 0.599 × 10−3 46.85

Propane Gas 2.516 × 10−3 61.46

Fuel Gas4 1.388 × 10−3 59.00

Biomass fuels—solid mmBtu/short ton kg CO2/mmBtu

Wood and Wood Residuals (dry basis)5 17.48 93.80

Agricultural Byproducts 8.25 118.17

Peat 8.00 111.84

Solid Byproducts 10.39 105.51

Biomass fuels—gaseous mmBtu/scf kg CO2/mmBtu

Landfill Gas 0.485 × 10−3 52.07

Other Biomass Gases 0.655 × 10−3 52.07

Biomass Fuels—Liquid mmBtu/gallon kg CO2/mmBtu

Ethanol 0.084 68.44

Biodiesel (100%) 0.128 73.84

Rendered Animal Fat 0.125 71.06

Vegetable Oil 0.120 81.55

1

The HHV for components of LPG determined at 60 °F and saturation pressure with the exception 

of ethylene.

2

Ethylene HHV determined at 41 °F (5 °C) and saturation pressure.

3

Use of this default HHV is allowed only for: (a) Units that combust MSW, do not generate steam, 

and are allowed to use Tier 1; (b) units that derive no more than 10 percent of their annual heat input 

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from MSW and/or tires; and (c) small batch incinerators that combust no more than 1,000 tons of MSW 

per year.

4

Reporters subject to subpart X of this part that are complying with §98.243(d) or subpart Y of this 

part may only use the default HHV and the default CO2 emission factor for fuel gas combustion under 

the conditions prescribed in §98.243(d)(2)(i) and (d)(2)(ii) and §98.252(a)(1) and (a)(2), respectively. 

Otherwise, reporters subject to subpart X or subpart Y shall use either Tier 3 (Equation C-5) or Tier 4.

5

Use the following formula to calculate a wet basis HHV for use in Equation C-1: HHVw = ((100 −

M)/100)*HHVd where HHVw = wet basis HHV, M = moisture content (percent) and HHVd = dry basis 

HHV from Table C-1.

[78 FR 71950, Nov. 29, 2013]

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