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Autothermal operation refers to a reactor that

  • A.is cooled by the product stream alone
  • B.uses its own reaction heat to preheat
  • C.operates at ambient temperature throughout
  • D.requires no reaction to take place at all

Answer: B

A feed effluent heat exchanger returns the reaction heat to the incoming stream, so no external heating is needed once running. Starting such a system up requires an auxiliary heat source. The exchanger returns heat to the incoming feed.

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