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Utilization of liquid nitrogen for the accelerated cooling of fixed bed catalytic reactors.

Utilisation de l'azote liquide pour le refroidissement accéléré des réacteurs catalytiques en lit fixe.

Author(s) : DRASKOVIC F., KIEHL V., THONNELIER J. Y.

Type of article: Article

Summary

The Air Liquide company developed an accelerated cooling technique of the catalysts by an injection of cold gaseous or liquid nitrogen and recommends it to its customers, for immediate use. The article explains the area of utilization of the technique along with its variations. Simulation enables the accelerated cooling time to be determined and the specification of the equipment (cryopump, control valve, injector). Three types of cooling for an hydrocracker are simulated this way: conventional cooling, cold gaseous nitrogen cooling, liquid nitrogen cooling. The use of liquid nitrogen decreases by half the cooling time, while the gaseous nitrogen calls for a high fluid consumption and only lessens the cooling time by 38%. J.V.

Details

  • Original title: Utilisation de l'azote liquide pour le refroidissement accéléré des réacteurs catalytiques en lit fixe.
  • Record ID : 1995-1417
  • Languages: French
  • Source: Rev. gén. Froid - vol. 83 - n. 935
  • Publication date: 1993/07
  • Document available for consultation in the library of the IIR headquarters only.

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