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.
Boiler house topics, fuels like oil, gas, coal, wood - chimneys, safety valves, tanks - combustion efficiency.
Climate, meteorology, sun, wind and environmental related engineering resources.
Environmental emission of carbon dioxide CO2 when combustion fuels like coal, oil, natural gas, LPG and bio energy.
Net (low) and gross (high) energy content in fossil and alternative fuels.
Combustion values in Btu/gal for fuel oils No.1 to No.6.
Autoignition points for fuels and chemicals like butane, coke, hydrogen, petroleum and more.
Cost comparison formulas for heating fuels like Natural Gas, Propane LP Gas, Fuel Oil and Electricity.
Enthalpy, internal energy and entropy of Nitrogen as an ideal gas.
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.
Chemical, Physical and Thermal Properties of Nitrogen - N2.
Stable and efficient combustion requires correct mixture of fuels and oxygen.
Properties like heat values, air/fuel ratios, flame speed, flame temperatures, ignition temperatures, flash points and flammability limits.
Standard grades coal heat values.
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