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Nitrogen Oxides (NOx) Emission from Fuels

Emission of Nitrogen Oxides - NOx - with combustion of fuels like oil, coal, propane and more.

Emission of Nitrogen Oxides - NOx - when burning different types of fuels:

NOx - Nitrogen Oxides - Emission from Fuels
FuelEmission1)
(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.

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