Nitrogen Oxides (NOx) Emission from Fuels
Emission of Nitrogen Oxides - NOx - when burning different types of fuels:
| Fuel | Emission1) (10-3 kgNOx / kgfuel) |
|---|---|
| Oil | 3.0 |
| Kerosene | 3.0 |
| Coal | 4.5 |
| Propane | 2.3 |
| Gasoline | 27 3) |
| Hydrogen | 0 2) |
| Natural Gas | 1.0 |
| Butane | 2.3 |
| Wood, Birch 20% moisture content | 0.7 |
1) note that the emission varies widely depending on application temperatures and air/fuel ratios. In general - higher combustion temperature and higher air/fuel ratios increases NOx emissions.
2) zero emission for hydrogen is a theoretically value. In practice hydrogen burned in air produces more NOx than natural gas due to the high flame temperature
3) catalytic systems common on most modern vehicles reduces NOx
NOx emissions contributes to eutrophication, acidification and the formation of ground-level ozone.
Related Topics
• Combustion
Combustion processes and their efficiency. Boiler house and chimney topics. Properties of fuels like oil, gas, coal and wood and more. Safety valves and tanks.
• Environment
Climate, meteorology, solar, wind, emissions and environmental related engineering resources.
Related Documents
Combustion of Fuels - Carbon Dioxide Emission
Environmental emission of carbon dioxide CO2 when combustion fuels like coal, oil, natural gas, LPG and bio energy.
Fossil vs. Alternative Fuels - Energy Content
Net (low) and gross (high) energy content in fossil and alternative fuels.
Fuel Oil Combustion Values
Combustion values in Btu/gal for fuel oils No.1 to No.6.
Fuels and Chemicals - Autoignition Temperatures
Autoignition points for fuels and chemicals like butane, coke, hydrogen, petroleum and more.
Heating Fuels - Cost Comparing
Cost comparison formulas for heating fuels like Natural Gas, Propane LP Gas, Fuel Oil and Electricity.
Nitrogen - Enthalpy, Internal Energy and Entropy vs. Temperature
Enthalpy, internal energy and entropy of Nitrogen as an ideal gas.
Nitrogen - Density and Specific Weight vs. Temperature and Pressure
Online calculator, figures and tables showing density and specific weight of nitrogen, N2, at temperatures ranging from -175 to 1325 °C (-280 to 2400 °F) at atmospheric and higher pressure - Imperial and SI Units.
Nitrogen - Thermophysical Properties
Chemical, Physical and Thermal Properties of Nitrogen - N2.
Optimal Combustion Processes - Fuel vs. Excess Air
Stable and efficient combustion requires correct mixture of fuels and oxygen.
Paraffins and Alkanes - Combustion Properties
Properties like heat values, air/fuel ratios, flame speed, flame temperatures, ignition temperatures, flash points and flammability limits.
Standard Grade Coal - Heat Values
Standard grades coal heat values.