Please note that these references are outdated and apply to the 2017 and 2018 version of emission factors only. See the Carbon References Page and Nitrogen References Page for current emission factor information.
| Scope 1: On-campus stationary sources | |||||
|---|---|---|---|---|---|
| Name | Unit | Source | URL | Calculations | Notes |
| Residual Oil (#5-6) | kg NOx / Gallon |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions), and [2] Monthly Energy Review, July 26, 2016. Energy Information Administration, U.S. Department of Energy. Appendix A (heating value). |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)*(MMBtu/gal) |
Divided total US commercial petroleum NOx emissions (kt) by total US commercial petroleum fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by residual oil heating value to convert to units (kg NOx/gal). Heating values for liquid fuels were changed from MMBtu / Barrel to MMBtu / gallon using 42 gallons / barrel. All factors are Higher Heating Values, as used by the US EPA. |
| Distillate Oil (#1-4) | kg NOx / Gallon |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions), and [2] Monthly Energy Review, July 26, 2016. Energy Information Administration, U.S. Department of Energy. Appendix A (heating value). |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/gal) | Divided total US commercial petroleum NOx emissions (kt) by total US commercial petroleum fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by distillate oil heating value to convert to units (kg NOx/gal). Heating values for liquid fuels were changed from MMBtu / Barrel to MMBtu / gallon using 42 gallons / barrel. All factors are Higher Heating Values, as used by the US EPA. |
| Natural Gas | kg NOx / MMBtu | [1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions) | [1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 | (kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu) | Divided total US commercial natural gas NOx emissions (kt) by total US commercial natural gas fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). |
| LPG (Propane) | kg NOx / Gallon |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions), and [2] Monthly Energy Review, July 26, 2016. Energy Information Administration, U.S. Department of Energy. Appendix A (heating value). |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/gal) | Divided total US commercial petroleum NOx emissions (kt) by total US commercial petroleum fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by LPG propoane heating value to convert to units (kg NOx/gal). Heating values for liquid fuels were changed from MMBtu / Barrel to MMBtu / gallon using 42 gallons / barrel. All factors are Higher Heating Values, as used by the US EPA. LPG heating value based on total consumption data. |
| Coal (Steam Coal) | kg NOx / Short Ton |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions), and [2] Monthly Energy Review, July 26, 2016. Energy Information Administration, U.S. Department of Energy. Appendix A (heating value). |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/short ton) | Divided total US commercial coal NOx emissions (kt) by total US commercial coal fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by coal heating value to convert to units (kg NOx/short ton). Heating values for liquid fuels were changed from MMBtu / Barrel to MMBtu / gallon using 42 gallons / barrel. All factors are Higher Heating Values, as used by the US EPA. The heating value for coal is "Commercial Coal." |
| Incinerated Waste | kg NOx / Short Ton | [1] U.S. EPA. AP-42: Fifth Edition Compilation of Air Emission Factors, Volulme 1: Stationary Point and Area Sources. (External Combustion Boilers > Commercial/Institutional > Solid Waste) | [1] https://www.epa.gov/air-emissions-factors-and-quantification/ap-42-compilation-air-emission-factors | (lb/short ton) * (0.453592 kg/lb) | Average of two solid waste factors from AP-42: 'Refuse derived fuel' and 'Sepcify waste material in comments.' Uncontrolled emissions factors. Converted from units lb/short ton to kg/short ton. |
| Wood Chips | kg NOx / Short Ton |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions) [2] The Climate Registry, 2014. Climate Registry Default Emissions Factors. April 19, 2016. Accessed 7/16. (Table 12.1 "U.S. Default Factors for Calculating CO2 Emissions from Fossil Fuel and Biomass Combustion" p.5 of 83) |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 [2] http://www.theclimateregistry.org/resources/protocols/general-reporting-protocol/ |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/short ton) | NOx emissions for commercial wood combustion were not available, so NOx emissions for residential wood combustion were used instead. Residentail wood was selected from the GHG Inventory after comparing the range of calculated emissions factors to those in the EPA AP-42 database for commonly used wood boilers in commercial combustion (e.g., fluidized bed, stoker boilers). Divided total US residential NOx emissions (kt) by total US residential wood fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by wood heating value (for wood & waste) to convert to units (kg NOx/short ton). All factors are Higher Heating Values, as used by the US EPA. |
| Wood Pellets | kg NOx / Short Ton |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions) [2] The Climate Registry, 2014. Climate Registry Default Emissions Factors. April 19, 2016. Accessed 7/16. (Table 12.1 "U.S. Default Factors for Calculating CO2 Emissions from Fossil Fuel and Biomass Combustion" p.5 of 83) |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 [2] http://www.theclimateregistry.org/resources/protocols/general-reporting-protocol/ | (kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/short ton) | Assumed to be equal to wood chips. |
| Grass Pellets | kg NOx / Short Ton |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions) [2] The Climate Registry, 2014. Climate Registry Default Emissions Factors. April 19, 2016. Accessed 7/16. (Table 12.1 "U.S. Default Factors for Calculating CO2 Emissions from Fossil Fuel and Biomass Combustion" p.5 of 83) |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 [2] http://www.theclimateregistry.org/resources/protocols/general-reporting-protocol/ |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/short ton) | Assumed to be equal to wood chips. |
| Residual BioHeat | kg NOx / Gallon |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions), and [2] Monthly Energy Review, July 26, 2016. Energy Information Administration, U.S. Department of Energy. Appendix A (heating value). |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/gal) | Divided total US commercial petroleum NOx emissions (kt) by total US commercial petroleum fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by residual oil heating value to convert to units (kg NOx/gal). Heating values for liquid fuels were changed from MMBtu / Barrel to MMBtu / gallon using 42 gallons / barrel. All factors are Higher Heating Values, as used by the US EPA. Residual bioheat heating value is a weighted average between residual oil (80%) and B100 (20%). |
| Distillate BioHeat | kg NOx / Gallon |
[1] U.S. EPA. Inventory of U.S. Greenhouse Emissions and Sinks: 1990 - 2014. Released April 15, 2016. Annex 3, Section 3.1, Table A-87 (fuel consumption) and Table A-90 (NOx emissions), and [2] Monthly Energy Review, July 26, 2016. Energy Information Administration, U.S. Department of Energy. Appendix A (heating value). |
[1] https://www.epa.gov/ghgemissions/inventory-us-greenhouse-gas-emissions-and-sinks-1990-2015 |
(kt NOx/TBtu fuel) * (1,000,000 kg/kt) * (TBtu/1,000,000 MMBtu)* (MMBtu/gal) | Divided total US commercial petroleum NOx emissions (kt) by total US commercial petroleum fuel consumption (TBtu). Converted from units (kt NOx/TBtu) to units (kg NOx/MMBtu). Multiplied by distillate oil heating value to convert to units (kg NOx/gal). Heating values for liquid fuels were changed from MMBtu / Barrel to MMBtu / gallon using 42 gallons / barrel. All factors are Higher Heating Values, as used by the US EPA. Distillate bioheat heating value is a weighted average between distillate oil (80%) and B100 (20%). |
| Other | kg NOx / MMBtu | n/a | n/a | n/a | Customized by users. No data entry here. |