Determination of P-V-T-x properties of the CO2-H2O system up to 573.15 K and 120 MPa—Experiments and model
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- 作者：Qingcheng Hua ; Huirong Guob ; elsieguo@126.com" class="auth_mail" title="E-mail the corresponding author ; Xinbiao Lü ; a ; c ; Wanjun Lua ; Ying Chenb ; d ; Yan Zhub ; Lantao Genga
- 关键词：P&ndash ; V&ndash ; T&ndash ; x ; CO2&ndash ; H2O system ; Measurements ; Model
- 刊名：Chemical Geology
- 出版年：2016
- 出版时间：10 April 2016
- 年：2016
- 卷：424
- 期：Complete
- 页码：60-72
- 全文大小：1979 K
文摘
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A new method was developed to measure P–V–T–x properties of the CO2–H2O system up to 513.15 K and 120 MPa.
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The data partially fill the current density/molar volume data gap.
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The apparent molar volume of CO2 in water (VΦ,CO2) shows obvious negative dependence on pressure beyond 298.15 K.
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The pivoting temperature (where ρCO2–H2O = ρH2O) monotonously increases from 489 K at 30 MPa to 575 K at 120 MPa.
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A revised VΦ,CO2 model for dilute CO2–H2O systems was proposed.