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Ammonia dispersion: a report on recent IIAR (International Institute of Ammonia Refrigeration) papers and research.

Author(s) : WHITE R.

Type of article: Article

Summary

The paper reports on tests conducted on the dispersion of ammonia vapour in air. This takes place by diffusion, in which molecules move from high to low concentration areas in still air, by dilution in a moving air stream or, if sufficiently concentrated, ammonia at a lower density than air can rise rapidly until dilution occurs. Providing ready access to free air is available there is little danger in relatively open spaces. Dispersal into water is an obvious possibility for relief valve or similar discharges as aqueous ammonia and ammonium hydroxide are relatively harmless. However, water absorption of ammonia is exothermic with the absorptivity decreasing as temperature rises. Generally a 10 to 1 weight ratio of water to expected ammonia absorption is reasonable. Water sprays can also be used. D.W.H.

Details

  • Original title: Ammonia dispersion: a report on recent IIAR (International Institute of Ammonia Refrigeration) papers and research.
  • Record ID : 1993-1261
  • Languages: English
  • Source: AIRAH J. - vol. 46 - n. 8
  • Publication date: 1992/08
  • Document available for consultation in the library of the IIR headquarters only.

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