N2O from Circulating Fluidized Bed Boilers - Present Status

Conference contribution, 1990

Several conclusions can be made about the N2O emissions from CFB boilers, for instance: - Much more of the fuel nitrogen leaves with the flue gases in the form of N20 than NO. - The N2O emission decreases with increasing bed temperature, unlike the NO emission. - The N2O emission decreases with decreasing excess air, similar to the NO emission. - High volatile fuels result in lower N20 emission than low volatile fuels. - The N20 concentration increases in the vertical direction of the combustion chamber.