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Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 98, Subpt. C, Tbl. C-1 TABLE C–1 TO SUBPART C OF PART 98—DEFAULT CO 2 EMISSION FACTORS AND HIGH HEAT VALUES FOR VARIOUS TYPES OF FUEL

Current as of January 02, 2025 | Updated by Findlaw Staff

Table C-1 to Subpart C of Part 98—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 x 10-3

53.06

Petroleum products–liquid

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

Propane 1

0.091

62.87

Propylene 2

0.091

67.77

Ethane 1

0.068

59.60

Ethanol

0.084

68.44

Ethylene 2

0.058

65.96

Isobutane 1

0.099

64.94

Isobutylene 1

0.103

68.86

Butane 1

0.103

64.77

Butylene 1

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

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

Petroleum products—solid

mmBtu/short ton

kg CO2/mmBtu

Petroleum Coke

30.00

102.41

Petroleum products—gaseous

mmBtu/scf

kg CO2/mmBtu

Propane Gas

2.516 x 10-3

61.46

Other fuels—solid

mmBtu/short ton

kg CO2/mmBtu

Municipal Solid Waste

9.95 3

90.7

Tires

28.00

85.97

Plastics

38.00

75.00

Other fuels—gaseous

mmBtu/scf

kg CO2/mmBtu

Blast Furnace Gas

0.092 x 10-3

274.32

Coke Oven Gas

0.599 x 10-3

46.85

Fuel Gas 4

1.388 x 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 x 10-3

52.07

Other Biomass Gases

0.655 x 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 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)*HHVdwhere HHVw = wet basis HHV, M = moisture content (percent) and HHVd = dry basis HHV from Table C-1.

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Cite this article: FindLaw.com - Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 98, Subpt. C, Tbl. C-1 TABLE C–1 TO SUBPART C OF PART 98—DEFAULT CO 2 EMISSION FACTORS AND HIGH HEAT VALUES FOR VARIOUS TYPES OF FUEL - last updated January 02, 2025 | https://codes.findlaw.com/cfr/title-40-protection-of-environment/cfr-pt-40-98-subpt-c-tbl-c-1/

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