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Emission abatement systems for biomass-fired plants

The main pollutants emitted from a biomass plant include:
  • Nitrogen Oxides (NOx)
  • Sulphur dioxide (SO2)
  • Chlorides (HCl)
  • CO 
  • Particulate matter (fly ash).

With a reasonable fuel quality, all pollutants except particulate matter can typically be contained within emission limits by primary combustion methods.

Fly ash reduction is generally achieved by application of baghouse filter or Electrostatic Precipitation (ESP) technology, which may be combined with reactant injection in case other acidic compounds (e.g. SO2, HCl) need to be further reduced.

Selective Non-Catalytic Reduction of NOx by injection of an ammonia reactant in the boiler is an option to achieve lower NOx emission levels.


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