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The converter uses several catalyst beds with cooling between them because

  • A.the reaction is exothermic and reversible
  • B.the catalyst must be regenerated between the beds
  • C.the pressure must be raised at every stage
  • D.a different catalyst is used in each bed

Answer: A

Each bed converts a portion and heats the gas, and cooling before the next bed restores a favourable equilibrium. Four beds are typical and take the conversion above ninety-eight per cent. Each bed operates on the same catalyst.

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