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Analysis of refrigerant R452B in use-phase versus pristine conditions using gas chromatography.

Number: 0050

Author(s) : GUNASEKARA S. N., PALM B., IGNATOWICZ M., HILL P.

Summary

Refrigerants today include blends of e.g. hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs). HFOs have low global warming potential however are also less stable, risking compositional variations, with not much known yet. To add new knowledge, R452B (with R32, R125 and R1234yf) is analysed here, in used (7790 h in a heat pump) and pristine conditions, in a gas chromatograph with a thermal conductivity detector (TCD) and a flame ionization detector (FID). R452B was compared with moisture, N2 and a calibration blend containing CO2, R32, R125, R134a and R1234yf. The results yielded, besides the intended three components in R452B, also traces of R134a, moisture, possibly CO2 and several unknown compounds eluting before (thus lighter than) CO2. Some unknowns appeared only in TCD are thus non-combustible (including possibly O2), while some appeared in both TCD and FID. The identification of these unknowns, calibrations for those and a comprehensive compositional analysis will follow.

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Pages: 12 p.

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Details

  • Original title: Analysis of refrigerant R452B in use-phase versus pristine conditions using gas chromatography.
  • Record ID : 30031689
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0050

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