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A fluidised bed is often used for a fluid solid reaction because

  • A.it handles solids continuously
  • B.it gives plug flow of the solids in it
  • C.the particles in it do not move
  • D.no gas at all is required for it

Answer: A

Ore roasting and coal combustion both exploit this, and the vigorous mixing prevents local overheating. The solids residence time distribution is broad, which means some particles leave before they are fully converted.

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