Methods for reducing the emission of nitrous oxide from circulating fluidized bed combustion
Journal article, 1996

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.

nitrous oxide emissions

Fluidized bed combustion



reversed air staging


Anders Lyngfelt

Department of Energy Conversion

Lars-Erik Åmand

Department of Energy Conversion

Lennart Gustavsson

Bo G Leckner

Department of Energy Conversion

Energy Conversion and Management

0196-8904 (ISSN)

Vol. 37 6-8 1297-1302

Driving Forces

Sustainable development

Subject Categories

Energy Engineering

Chemical Engineering

Other Environmental Engineering

Areas of Advance



Basic sciences


Chalmers Power Central



More information

Latest update

4/5/2022 6