Table A.4. Nitrogen Oxides Control Technology Emissions Reduction Factors

Reduction Factor
Nitrogen Oxides Control Technology EIA Code Coal Residual Fuel Oil and Distallate Fuel Oil Natural Gas Wood Other Solids Other Liquids Other Gases Other Fuels
Burner Out of Service BO 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
Low Excess Air LA 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
Biased Firing (Alternative Burners) BF 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
Overfire Air OV 0.25 0.25 0.25 0.25 0.25 0.25 0.25 0.25
Advanced Overfire Air AA 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3
Low NOx Burners LN 0.45 0.45 0.5 0.45 0.45 0.45 0.5 0.45
Fuel Reburning FU 0.55 0.55 0.55 0.55 0.55 0.55 0.55 0.55
Selective Noncatalytic Reduction SN 0.45 0.325 0.325 0.55 0.45 0.325 0.325 0.45
Selective Catalytic Reduction SR 0.8 0.8 0.85 0.8 0.8 0.8 0.85 0.8
Ammonia Injection NH3 0.625 0.5625 0.5875 0.675 0.625 0.5625 0.5875 0.625
Flue Gas Recirculation FR 0.45 0.45 0.45 0.45 0.45 0.45 0.45 0.45
Water Injection H2O 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
Steam Injection STM 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15
Other OT 0.15 0.15 0.15 0.15 0.15 0.15 0.15 0.15

 

Source of Selected Reduction Factor
Nitrogen Oxides Control Technology EIA Code Coal Residual Fuel Oil and Distallate Fuel Oil Natural Gas Wood Other Solids Other Liquids Other Gases Other Fuels
Burner Out of Service BO Source: 1 Source: 2 Source: 9 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Low Excess Air LA Source: 1 Source: 2 Source: 9 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Biased Firing (Alternative Burners) BF Source: 1 Source: 2 Source: 9 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Overfire Air OV Source: 1 Source: 9 Source: 9 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Advanced Overfire Air AA Source: 1 Source: 9 Source: 9 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Low NOx Burners LN Source: 1 Source: 2 Source: 3 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Fuel Reburning FU Source: 1 Source: 9 Source: 9 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Selective Noncatalytic Reduction SN Source: 1 Source: 2 Source: 4 Source: 5 Source: 9 Source: 10 Source: 11 Source: 9
Selective Catalytic Reduction SR Source: 1 Source: 2 Source: 4 Source: 9 Source: 9 Source: 10 Source: 11 Source: 9
Ammonia Injection NH3 Source: 6 Source: 6 Source: 6 Source: 6 Source: 9 Source: 10 Source: 11 Source: 9
Flue Gas Recirculation FR Source: 10 Source: 2 Source: 10 Source: 10 Source: 9 Source: 10 Source: 11 Source: 9
Water Injection H2O Source: 8 Source: 8 Source: 8 Source: 8 Source: 9 Source: 10 Source: 11 Source: 9
Steam Injection STM Source: 8 Source: 8 Source: 8 Source: 8 Source: 9 Source: 10 Source: 11 Source: 9
Other OT Source: 7 Source: 7 Source: 7 Source: 7 Source: 9 Source: 10 Source: 11 Source: 9

Source: U.S. Environmental Protection Agency, AP 42, Fifth Edition (Compilation of Air Pollutant Emission Factors, Volume 1: Stationary Point and Area Sources); available at: http://www.epa.gov/ttn/chief/ap42/

Source 1: AP-42, Table 1.1-2
Source 2: AP-42, Section 1.3.4.3 Text
Source 3: AP-42, Table 1.4-1
Source 4: AP-42, Section 1.4.4 Text
Source 5: AP-42, Section 1.6.4 Text
Source 6: Average of Selective Catalytic Reductiona and Selective Noncatalytic Reduction
Source 7: Minimum of other technologies for fuel group
Source 8: Matches Other selection
Source 9: Assumed to have reduction similar to coal
Source 10: Assumed to have reduction similar to Residual Fuel Oil and Distallate Fuel Oil
Source 11: Assumed to have reduction similar to natural gas

Notes:
Coal reduction factors are applied to Bituminous Coal, Subbituminous Coal, Lignite Coal, and Waste Coal.
Wood reduction factors are applied to Wood Waste Solids, Black Liquor, and Wood Waste Liquids.
Other Solids reduction factors are applied to Petroleum Coke, Mincipal Solid Waste, Tire-Derived Fuels, Sludge Waste, Agricultural Biproducts, and Other Biomass Solids.
Other Liquids reduction factors are applied to Jet Fuel, Kerosene, Waste Oil, and Other Biomass Liquids.
Other Gases reduction factors are applied to Blast Furnace Gas, Landfill Gas, Propane Gas, Coal-Derived Synthesis Gas, Synthesis Gas from Petroleum Coke, Other Biomass Gas, and Other Gas.