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 › peer-review

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Cite this

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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",

author = "Nobuo Hirano and Y. Ota and Noriyoshi Tsuchiya",

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language = "English",

volume = "29",

pages = "251--254",

journal = "Transactions - Geothermal Resources Council",

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publisher = "Geothermal Resources Council",

note = "Geothermal Resources Council 2005 Annual Meeting ; Conference date: 25-09-2005 Through 28-09-2005",

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TY - JOUR

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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M3 - Conference article

AN - SCOPUS:33745205080

VL - 29

SP - 251

EP - 254

JO - Transactions - Geothermal Resources Council

JF - Transactions - Geothermal Resources Council

SN - 0193-5933

T2 - Geothermal Resources Council 2005 Annual Meeting

Y2 - 25 September 2005 through 28 September 2005

ER -