Equilibrium Water Content Measurements for Acid Gas at High Pressures and Temperatures

Francis Bernard*, Robert A. Marriott, Binod R. Giri

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

6 Scopus citations


The design of safe and reliable acid gas compression, injection, and transport facilities requires a good understanding of the phase behavior of acid gas and water. Although many data are available for natural gas systems in open literature, there are limited reported data on the H2S + H20 system at pressures relevant to injection schemes and target reservoir pressures. For the past ten years, Alberta Sulphur Research Ltd. (ASRL) has been developing techniques for the measurement of water carrying capacity of gases, liquids, and supercritical fluids. With the current experimental method, water carrying capacity measurements at pressures up to 100 MPa and at temperatures up to 150°C are being carried out. Difficulties associated with this type of experiment will be discussed. Initial measurements have been completed for H2S + H20 at T = 50 and 100°C, and from p = 3.8 to 70.5 MPa. These new measurements serve to add information at conditions which are not covered by the existing literature, including extending available experimental values above p = 30 MPa. These new values, together with literature water content and H2S solubility and volumetric data, have been combined to calibrate a model for calculating equilibrium between H20 and H2S up to T = 200°C and p = 70 MPa. Model parameters have been reported, along with ASRUs future experimental and modeling plans in this area.

Original languageEnglish (US)
Title of host publicationSour Gas and Related Technologies
PublisherJohn Wiley and Sons
Number of pages20
ISBN (Print)9780470948149
StatePublished - Sep 19 2012
Externally publishedYes


  • Acid gas
  • Compression discharge
  • Gas chromatograph
  • Hydrogen sulfide
  • Water content

ASJC Scopus subject areas

  • Energy(all)


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