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If the observed rate of a catalytic reaction is limited by pore diffusion, the most effective remedy is

  • A.raising the reaction temperature
  • B.increasing the depth of the bed
  • C.using a more active catalyst
  • D.using smaller catalyst particles

Answer: D

A shorter diffusion path lets the reactant reach the interior, whereas a more active catalyst simply makes the limitation worse. Raising the temperature helps the reaction more than the diffusion and also makes matters worse.

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