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Compatibility and adsorbent properties of zeolite dehydrant molecular sieves in hydro-fluorocarbon refrigerants.

Compatibilità e proprietà adsorbenti dei desidratanti zeoliti setacci molecolari nei refrigeranti idrofluorocarbonio.

Author(s) : THAMM H., KILTHAU F.

Summary

3A and 4A-type-zeolites, used in conventional refrigerating systems in the past, have now to prove their chemical compatibility with refrigerant substitutes and their ability to achieve sufficient dehydration in new systems. R32 is often considered among the substitutes for R22. Due to its physical properties, which are similar to those of water, it will be absorbed in the micropores of most of the zeolites. Furthermore, problems arise regarding the compatibility and selectivity of water absorption in the zeolite/R32/lubricant system. To solve such problems, new zeolite have been developed with higher mechanical stability and chemical inertia. The authors describe the characteristics of the MS 594-grade zeolite which can be used with all refrigerants available on the market. In particular, they compared the experimental results obtained with R32 and MS 594, with those obtained with R32 and conventional 4A-type zeolite, as regards refrigerant dehydration.

Details

  • Original title: Compatibilità e proprietà adsorbenti dei desidratanti zeoliti setacci molecolari nei refrigeranti idrofluorocarbonio.
  • Record ID : 1998-1619
  • Languages: Italian
  • Source: Le ultime tecnologie del freddo e del condizionamento./ Latest technologies in refrigeration and air conditioning.
  • Publication date: 1997/06/27
  • Document available for consultation in the library of the IIR headquarters only.

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