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State whether the following is true or false.
A bimodal pore structure with wide transport pores and fine reaction pores is a common design.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: B

The wide pores carry the reactant into the pellet and the fine ones provide the surface area. It is a direct response to the conflict between area and transport. Wide pores carry, fine pores react. The two functions are separated by design.

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