Flue-gas Desulfurization - Methods

Methods

As stringent environmental regulations regarding SO2 emissions have been enacted in many countries, SO2 is now being removed from flue gases by a variety of methods. The below is among the common methods used:

  • Wet scrubbing using a slurry of alkaline sorbent, usually limestone or lime, or seawater to scrub gases;
  • Spray-dry scrubbing using similar sorbent slurries;
  • Wet sulfuric acid process recovering sulfur in the form of commercial quality sulfuric acid;
  • SNOX Flue gas desulfurization removes sulfur dioxide, nitrogen oxides and particulates from flue gases;
  • Dry sorbent injection systems.

For a typical coal-fired power station, flue-gas desulfurization (FGD) will remove 95 percent or more of the SO2 in the flue gases.

Read more about this topic:  Flue-gas Desulfurization

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