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All of the following are refinery conversion processes EXCEPT

  • A.fluid catalytic cracking of gas oil
  • B.hydrocracking under a high pressure
  • C.delayed coking of the residue
  • D.atmospheric distillation of the crude

Answer: D

Correct answer: atmospheric distillation of the crude

Distillation separates what is already there; it converts nothing. The other three all change the molecules - catalytic cracking and hydrocracking break large ones into smaller, and delayed coking rejects carbon from the residue to yield lighter products and petroleum coke. That distinction, separation against conversion, is the basic division of a refinery’s units.

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