Measurement of CO2-NaCI-H2O fluid mixture critical point by direct observation using the visible-type autoclave

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6 Citations (Scopus)


The critical points of CO2-H2O, NaCl-H2O and CO2-NaCl-H2O fluid mixtures were measured by observing the vanishing and appearance of the meniscus by using the visible-type autoclave. The critical points of CO2-H2O and NaCl-H 2O fluids shift linearly with the variation in ion concentrations. The general tendency of the critical point shifting of H2O-NaCl- CO2 multi-component fluid was similar to the H2O-CO 2 fluid. However at higher NaCl concentrations, the variation in the critical point was higher for higher CO2 concentrations. The above phenomenon is believed due to the interaction of ion or ions and water molecule that exists in the fluid.

Original languageEnglish
Pages (from-to)251-254
Number of pages4
JournalTransactions - Geothermal Resources Council
Publication statusPublished - 2005 Dec 1
EventGeothermal Resources Council 2005 Annual Meeting - Reno, NV, United States
Duration: 2005 Sep 252005 Sep 28


  • CO-HO fluid
  • CO-NaCl-HO fluid
  • Critical point
  • Multi-component fluid
  • NaCl-HO fluid

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Geophysics

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