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

Nobuo Hirano; Y. Ota; Noriyoshi Tsuchiya

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

Nobuo Hirano, Y. Ota, Noriyoshi Tsuchiya

ENV - Environmental Studies for Advanced Society

Research output: Contribution to journal › Conference article

6 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	251-254
Number of pages	4
Journal	Transactions - Geothermal Resources Council
Volume	29
Publication status	Published - 2005 Dec 1
Event	Geothermal Resources Council 2005 Annual Meeting - Reno, NV, United States Duration: 2005 Sep 25 → 2005 Sep 28

Keywords

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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Hirano, N., Ota, Y., & Tsuchiya, N. (2005). Measurement of CO₂-NaCI-H₂O fluid mixture critical point by direct observation using the visible-type autoclave. Transactions - Geothermal Resources Council, 29, 251-254.

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

abstract = "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.",

keywords = "CO-HO fluid, CO-NaCl-HO fluid, Critical point, Multi-component fluid, NaCl-HO fluid",

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T1 - Measurement of CO2-NaCI-H2O fluid mixture critical point by direct observation using the visible-type autoclave

AU - Hirano, Nobuo

AU - Ota, Y.

AU - Tsuchiya, Noriyoshi

PY - 2005/12/1

Y1 - 2005/12/1

N2 - 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.

AB - 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.

KW - CO-HO fluid

KW - CO-NaCl-HO fluid

KW - Critical point

KW - Multi-component fluid

KW - NaCl-HO fluid

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