Table C-1 to Subpart C—Default CO2 emission factors and high heat values for various types of fuel.

Table C-1 to Subpart C—Default CO₂ Emission Factors and High Heat Values for Various Types of Fuel
Fuel type	Default high heat value	Default CO₂ emission factor
¹The HHV for components of LPG determined at 60°F and saturation pressure with the exception of ethylene.
²Ethylene HHV determined at 41°F (5°C) and saturation pressure.
³Use 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.
⁴Reporters 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 CO₂emission 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.
⁵Use the following formula to calculate a wet basis HHV for use in Equation C-1: HHV_w= ((100 − M)/100)*HHV_dwhere HHV_w= wet basis HHV, M = moisture content (percent) and HHV_d= dry basis HHV from Table C-1.
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—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
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
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
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 × 10	61.46
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
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
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

[78 FR 71951, Nov. 29, 2013; 81 FR 89252, Dec. 9, 2016; 82 FR 41343, Aug. 31, 2017]

['Air Programs']

['Greenhouse Gases']

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Table C-1 to Subpart C—Default CO2 emission factors and high heat values for various types of fuel.