All terms used in this subpart have the same meaning given in the Clean Air Act and subpart A of this part. Sec. 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------------------------------------------------------------------------
Default high heat Default CO2
Fuel type value emission factor------------------------------------------------------------------------
Coal and coke mmBtu/short ton kg CO2/mmBtu------------------------------------------------------------------------Anthracite.................... 25.09 103.69Bituminous.................... 24.93 93.28Subbituminous................. 17.25 97.17Lignite....................... 14.21 97.72Coal Coke..................... 24.80 113.67Mixed (Commercial sector)..... 21.39 94.27Mixed (Industrial coking)..... 26.28 93.90Mixed (Industrial sector)..... 22.35 94.67Mixed (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 mmBtu/gallon kg CO2/mmBtu------------------------------------------------------------------------Distillate Fuel Oil No. 1..... 0.139 73.25Distillate Fuel Oil No. 2..... 0.138 73.96Distillate Fuel Oil No. 4..... 0.146 75.04Residual Fuel Oil No. 5....... 0.140 72.93Residual Fuel Oil No. 6....... 0.150 75.10Used Oil...................... 0.138 74.00Kerosene...................... 0.135 75.20Liquefied petroleum gases 0.092 61.71
(LPG) \1\.Propane \1\................... 0.091 62.87Propylene \2\................. 0.091 67.77Ethane \1\.................... 0.068 59.60Ethanol....................... 0.084 68.44Ethylene \2\.................. 0.058 65.96Isobutane \1\................. 0.099 64.94Isobutylene \1\............... 0.103 68.86Butane \1\.................... 0.103 64.77Butylene \1\.................. 0.105 68.72Naphtha (<401 deg F).......... 0.125 68.02Natural Gasoline.............. 0.110 66.88Other Oil (401 deg 0.139 76.22
F).Pentanes Plus................. 0.110 70.02Petrochemical Feedstocks...... 0.125 71.02Petroleum Coke................ 0.143 102.41Special Naphtha............... 0.125 72.34Unfinished Oils............... 0.139 74.54Heavy Gas Oils................ 0.148 74.92Lubricants.................... 0.144 74.27Motor Gasoline................ 0.125 70.22Aviation Gasoline............. 0.120 69.25Kerosene-Type Jet Fuel........ 0.135 72.22
Asphalt and Road Oil.......... 0.158 75.36Crude Oil..................... 0.138 74.54------------------------------------------------------------------------
Other fuels--solid mmBtu/short ton kg CO2/mmBtu------------------------------------------------------------------------Municipal Solid Waste......... 9.95 \3\ 90.7Tires......................... 28.00 85.97Plastics...................... 38.00 75.00Petroleum Coke................ 30.00 102.41------------------------------------------------------------------------
Other fuels--gaseous mmBtu/scf kg CO2/mmBtu------------------------------------------------------------------------Blast Furnace Gas............. 0.092 x 10-\3\ 274.32Coke Oven Gas................. 0.599 x 10-\3\ 46.85Propane Gas................... 2.516 x 10-\3\ 61.46Fuel Gas \4\.................. 1.388 x 10-\3\ 59.00------------------------------------------------------------------------
Biomass fuels--solid mmBtu/short ton kg CO2/mmBtu------------------------------------------------------------------------Wood and Wood Residuals (dry 17.48 93.80
basis) \5\.------------------------------------------------------------------------Agricultural Byproducts....... 8.25 118.17Peat.......................... 8.00 111.84Solid Byproducts.............. 10.39 105.51------------------------------------------------------------------------
Biomass fuels--gaseous mmBtu/scf kg CO2/mmBtu------------------------------------------------------------------------Landfill Gas.................. 0.485 x 10-\3\ 52.07Other Biomass Gases........... 0.655 x 10-\3\ 52.07------------------------------------------------------------------------
Biomass Fuels--Liquid mmBtu/gallon kg CO2/mmBtu------------------------------------------------------------------------Ethanol....................... 0.084 68.44Biodiesel (100%).............. 0.128 73.84Rendered Animal Fat........... 0.125 71.06Vegetable Oil................. 0.120 81.55------------------------------------------------------------------------\1\ The HHV for components of LPG determined at 60 [deg]F and saturation
pressure with the exception of ethylene.\2\ Ethylene HHV determined at 41 [deg]F (5 [deg]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
Sec. 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 Sec. 98.243(d)(2)(i) and (d)(2)(ii) and
Sec. 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]
Sec. Table C-2 to Subpart C of Part 98--Default CH4 and
N2O Emission Factors for Various Types of Fuel ------------------------------------------------------------------------
Default CH4 emission Default N2O emission
Fuel type factor (kg CH4/ factor (kg N2O/
mmBtu) mmBtu)------------------------------------------------------------------------Coal and Coke (All fuel 1.1 x 10-\02\ 1.6 x 10-\03\
types in Table C-1).Natural Gas................. 1.0 x 10-\03\ 1.0 x 10-\04\Petroleum (All fuel types in 3.0 x 10-\03\ 6.0 x 10-\04\
Table C-1).Fuel Gas.................... 3.0 x 10-\03\ 6.0 x 10-\04\Municipal Solid Waste....... 3.2 x 10-\02\ 4.2 x 10-\03\Tires....................... 3.2 x 10-\02\ 4.2 x 10-\03\Blast Furnace Gas........... 2.2 x 10-\05\ 1.0 x 10-\04\Coke Oven Gas............... 4.8 x 10-\04\ 1.0 x 10-\04\Biomass Fuels--Solid (All 3.2 x 10-\02\ 4.2 x 10-\03\
fuel types in Table C-1,
except wood and wood
residuals).Wood and wood residuals..... 7.2 x 10-\03\ 3.6 x 10-\03\Biomass Fuels--Gaseous (All 3.2 x 10-\03\ 6.3 x 10-\04\
fuel types in Table C-1).
Biomass Fuels--Liquid (All 1.1 x 10-\03\ 1.1 x 10-\04\
fuel types in Table C-1).------------------------------------------------------------------------Note: Those employing this table are assumed to fall under the IPCC
definitions of the ``Energy Industry'' or ``Manufacturing Industries
and Construction''. In all fuels except for coal the values for these
two categories are identical. For coal combustion, those who fall
within the IPCC ``Energy Industry'' category may employ a value of 1g
of CH4/mmBtu. [78 FR 71952, Nov. 29, 2013]