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Methods for reducing the emission of nitrous oxide from circulating fluidized bed combustion

Anders Lyngfelt (Institutionen för energiomvandling) ; Lars-Erik Åmand (Institutionen för energiomvandling) ; Lennart Gustavsson ; Bo Leckner (Institutionen för energiomvandling)
Energy Conversion and Management (0196-8904). Vol. 37 (1996), p. 1297-1302.
[Artikel, refereegranskad vetenskaplig]

Abstract - Two methods for the reduction of nitrous oxide emissions, afterbuming and reversed air staging, are investigated in a 12 MW circulating fluidized bed boiler. With afterburning the N2O emission can be reduced by 90% or more, using an amount of secondary fuel corresponding to 10% of the total energy input. With reversed air staging it is possible to reduce the emission of N2O to one fourth (25 ppm), without significantly affecting the other emissions. With reversed air staging no secondary air is used in the combustor and an air-ratio of about unity is maintained throughout the combustion chamber. Air for final combustion is added in the cyclone outlet.

Nyckelord: Fluidized bed combustion, reversed air staging, afterburning, nitrous oxide emissions, N2O



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Institutionen för energiomvandling (1900-2003)

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