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Home > Greenhouse issue > N2O emissions from coal use 

N2O emissions from coal use

Author(s): Mitsuru Takeshita, Lesley Sloss, Irene Smith

Price: £60.00

Ref: IEAPER/06 ISBN: 92-9029-227-X Published Date: 01/11/1993

No. of Tables: 10 No. of Figures: 3 No. of Pages: 28

Emissions of N20 have a role in the enhanced greenhouse effect. N₂0 is a long-lived gas, surviving in the atmosphere for about 130 years. The concentration of N₂0 in the atmosphere is increasing due to a variety of sources including a small contribution from coal combustion. It has been suggested that NOx abatement and control technologies and fluidised bed combustion systems may increase emissions of N₂0 from coal use. This report evaluates these emissions and considers measures which may be taken to prevent increased emissions of N₂0 from such technologies. It is estimated that global coal use is currently responsible for 2-6% of the total emissions of N₂0 from human activities or <1-2% of total sources of N₂0 . Flue gas desulphurisation technologies for SO₂ control, combustion modifications and selective catalytic reduction for NOx control do not affect or may reduce N₂0 emissions. Selective non-catalytic reduction production probably increases N₂0 emissions. Fluidised bed combustion of coal emits considerably higher concentrations of N₂0 than conventional combustion. Optimal measures for N₂0 control require verification on commercial fluidised bed combustion plants.

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