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Determination of P-V-T-x properties of the CO2-H2O system up to 573.15 K and 120 MPa-Experiments and model

文献类型：期刊论文

作者Lu, Xinbiao3,4; Chen, Ying1,2; Zhu, Yan1; Hu, Qingcheng4; Geng, Lantao4; Lu, Wanjun4; Guo, Huirong1
刊名CHEMICAL GEOLOGY
出版日期2016-04-10
卷号424页码:60-72
关键词P-v-t-x Co2-h2o System Measurements Model
DOI10.1016/j.chemgeo.2016.01.011
文献子类Article
英文摘要A new method is being developed as part of this study to measure the Pressure-Volume-Temperature-composition (P-V-T-x) properties of the CO2-H2O system at temperatures from 273.15 to 513.15 K and pressures from 30 to 120 MPa. The density of a CO2-H2O solution is determined by measuring the volumetric change of the solution sealed in a capillary High-Pressure Optical Cell (HPOC), through a systematic correction. This study partially fills the current density/molar volume data gap for dilute CO2-H2O systems. Data show that the density of CO2-H2O mixture (rho(CO2-H2O)) changes little below 298.15 K, then decreases more rapidly than rho(H2O) with increasing temperature at constant pressure, and eventually becomes lower than rho(H2O) in high temperature range (for example, above 489 K at 30 MPa). This pivoting temperature (T-p, above which rho(CO2-H2O) becomes lower than rho(H2O)) monotonously increases with increasing pressure (to 575 K as the pressure reaches 120 MPa). The calculated apparent molar volume of CO2 in water (V-Phi,V-CO2) is independent of CO2 concentration, but is negatively correlated to pressure when the temperature is above 298.15 K. A revised V-Phi,V-CO2 model for dilute CO2-H2O systems is proposed based on this study. This revised model can reproduce both the current and previous density data with an acceptable error range at temperatures up to 573.15 K and pressures up to 120 MPa. It can be used reliably to simulate geological sequestration of CO2 into water aquifers, and in the study of P-V-T-x evolution of geo-fluids (e.g., CO(2-)bearing aqueous ore forming fluids). (C) 2016 Elsevier B.V. All rights reserved.
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WOS关键词SYNTHETIC FLUID INCLUSIONS ; CARBON-DIOXIDE SEQUESTRATION ; EQUATION-OF-STATE ; PVTX PROPERTIES ; THERMODYNAMIC PROPERTIES ; INFINITE DILUTION ; SALINE FORMATIONS ; AQUEOUS-SOLUTIONS ; CO2 SOLUBILITY ; HIGH-TEMPERATURES
语种英语
WOS记录号WOS:000370021200005
版本出版稿
源URL[http://ir.idsse.ac.cn/handle/183446/1508]  
专题深海科学研究部_深海极端环境模拟研究实验室
作者单位1.China Univ Geosci, Sch Environm Studies, Wuhan 430074, Peoples R China
2.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China
3.China Univ Geosci, Geol Survey Inst, Wuhan 430074, Peoples R China
4.China Univ Geosci, Fac Earth Resources, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China
推荐引用方式
GB/T 7714		 Lu, Xinbiao,Chen, Ying,Zhu, Yan,et al. Determination of P-V-T-x properties of the CO2-H2O system up to 573.15 K and 120 MPa-Experiments and model[J]. CHEMICAL GEOLOGY,2016,424:60-72.
APA Lu, Xinbiao.,Chen, Ying.,Zhu, Yan.,Hu, Qingcheng.,Geng, Lantao.,...&Guo, Huirong.(2016).Determination of P-V-T-x properties of the CO2-H2O system up to 573.15 K and 120 MPa-Experiments and model.CHEMICAL GEOLOGY,424,60-72.
MLA Lu, Xinbiao,et al."Determination of P-V-T-x properties of the CO2-H2O system up to 573.15 K and 120 MPa-Experiments and model".CHEMICAL GEOLOGY 424(2016):60-72.

入库方式： OAI收割

来源：深海科学与工程研究所

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