Rapid hydrocarbon dew points by infrared spectroscopy: Results and validation for binary mixtures of methane + {propane, isobutane and butane}

Corey J. Baker, Thomas J. Hughes, Brendan F. Graham, Kenneth N. Marsh, Eric F. May

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4 Citations (Scopus)


An industrial hydrocarbon dew point detector based on infrared absorption spectroscopy was tested down to a temperature of 243 K and at pressures up to 10 MPa. Dew temperatures were measured isobarically for pure ethane and mixtures of methane + {propane, isobutane, or n-butane}. Ethane dew temperatures were within ±0.38 K of the reference equation of state prediction. Mixture dew temperatures below the cricondentherm were determined within 0.7 K. At higher pressures, dew temperatures were over-predicted due to the rapid changes in gas density with temperature. Improved performance could be achieved by isochoric operation, and by reducing temperature scan rates.

Original languageEnglish
Pages (from-to)304-310
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Publication statusPublished - 25 Feb 2018
Externally publishedYes


  • Butane
  • Dew points
  • Infrared absorption spectroscopy
  • Methane
  • Propane

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