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Wet limestone flue gas desulphurisation removes sulphur dioxide by

  • A.Absorbing it into a limestone slurry
  • B.Adsorbing it on activated carbon
  • C.Oxidising it catalytically to sulphur
  • D.Condensing it as liquid sulphur dioxide

Answer: A

Forced oxidation gives saleable gypsum, which is what makes the process economically tolerable at large scale. It reaches over ninety-five per cent removal but produces a cooled, saturated gas that usually needs reheat.

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