Friday, 11 November 2016

Combustion of Fuels and Nitrogen Oxides (NOx) Emission

Combustion of Fuels and Nitrogen Oxides (NOx) Emission

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

  Emission of Nitrogen Oxides - NOx - when burning fuels:
FuelEmission of NOx 1)
(g/kg fuel)
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 speed
3) catalytic systems common on most modern vehicles reduces NOx
NOx emissions contributes to eutrophication, acidification and the formation of ground-level ozone.

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