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Regeneration of an activated carbon bed is usually carried out with

  • A.Acid washing
  • B.Mechanical agitation
  • C.Steam, allowing recovery
  • D.Cold air

Answer: C

Steam raises the bed temperature and lowers the partial pressure of the adsorbate, driving it off so it can be condensed and recovered. Recovering a valuable solvent in this way often pays for the installation on its own.

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