Measurement and modeling of CO2 solubility in NaCl brine and CO2–saturated NaCl brine density

Yan, Wei; Huang, Shengli; Stenby, Erling Halfdan

doi:10.1016/j.ijggc.2011.08.004

Cited by 207 publications

(200 citation statements)

References 74 publications

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“…(a) Symbols: this work , T = 293 K; , T = 298 K; , T = 308 K; , T = 323 K; , T = 343 K; , T = 373 K; , T = 398 K; , T = 423 K; , T = 448 K. Curves: ρaq predicted using the EOS of Spycher et al [16], [18] (for saturated phase composition) in place of the Duan et al [14] at the experimental conditions studied in this work. (b) Symbols: , this work; , Chiquet et al [9]; , Yan et al [36]; , Hebach et al [7]; ,Tabasinejad et al [10]; , Yaginuma et al [11]. Curves: ρaq predicted (entirely) with the EOS-CG of Span and co-workers [32] at the experimental conditions studied in this work.…”

Section: Aqueous Phase Of Co2 + H2omentioning

confidence: 76%

Saturated phase densities of (CO 2 + H 2 O) at temperatures from (293 to 450) K and pressures up to 64 MPa

Efika

Hoballah

et al. 2016

The Journal of Chemical Thermodynamics

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An apparatus consisting of an equilibrium cell connected to two vibrating tube densimeters and two syringe pumps was used to measure the saturated phase densities of CO2 + H2O at temperatures from (293 to 450) K and pressures up to 64 MPa, with estimated average standard uncertainties of 1.5 kg·m -3 for the CO2-rich phase and 1.0 kg·m -3 for the aqueous phase. The densimeters were housed in the same thermostat as the equilibrium cell and were calibrated in-situ using pure water, CO2 and helium. Following mixing, samples of each saturated phase were displaced sequentially at constant pressure from the equilibrium cell into the vibrating tube densimeters connected to the top (CO2-rich phase) and bottom (aqueous phase) of the cell. The aqueous phase densities are predicted to within 3 kg·m -3 using empirical models for the phase compositions and partial molar volumes of each . The density of the CO2-rich phase was always within about 8 kg·m -3 of the density for pure CO2 at the same pressure and temperature; the differences were most positive near the critical density, and became negative at temperatures above about 373 K and pressures below about 10 MPa. For this phase, the multi-parameter EOS of Gernert and Span describes the measured densities to within 5 kg·m -3, whereas the computationally-efficient cubic EOS model of Spycher and Pruess [Transport in Porous Media 2010, 82, 173-196], commonly used in simulations of subsurface CO2 sequestration, deviates from the experimental data by a maximum of about 3 kg·m -3.

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Section: Aqueous Phase Of Co2 + H2omentioning

confidence: 76%

Saturated phase densities of (CO 2 + H 2 O) at temperatures from (293 to 450) K and pressures up to 64 MPa

Efika

Hoballah

et al. 2016

The Journal of Chemical Thermodynamics

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“…Li et al [13] reported the CO 2 mass fraction in Weyburn brine was 0.0339 at 332.15 K and 10.38 MPa. And Yan et al [16] measured that the CO 2 solubility was 0.0292 at 373.2 K, 10.00 MPa in 1 mol/kg NaCl brine. To ensure that the CO 2 would dissolve in the brine completely during the measurement, the CO 2 mass fraction in Dagang -Formation brine was selected up to 0.0300.…”

Section: Methodsmentioning

confidence: 99%

“…The partial molar volumes were calculated by the experimental densities and PC-SAFT and tPC-PSAFT models were used to predict the CO 2 aqueous solution. Yan et al [16] reported the densities of CO 2 in 0, 1 and 5 mol/kg NaCl brine at 323 K, 373 K and 413 K and pres-…”

Section: Introductionmentioning

confidence: 99%

Density measurement and equal density temperature of CO2+brine from Dagang — formation from 313 to 363 K

Zhang

Jian

Zhan

et al. 2014

Korean J. Chem. Eng.

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Densities of CO 2 +Dagang -formation brine solution were measured by a magnetic suspension balance (MSB) in the pressure range from (10 to 18) MPa, at the temperatures from (313.15 to 363.15) K and CO 2 mass fractions at 0, 0.0101, 0.0198 and 0.0299. The experimental results revealed that the solution densities increased linearly with the increasing pressure and CO 2 concentration, while decreasing with the increasing temperatures in the experimental range. When the temperature increased from (313.15 to 363.15) K, the slopes of the densities versus (vs.) CO 2 mass fractions decreased from (0.193 to 0.106) g·cm −3 . A correlation equation was developed based on thermodynamic theory and experimental data. The absolute average deviation between the correlation equation and the experimental data was 0.05%, and the maximum deviation was 0.37% for the density of CO 2 +water/brine solution in common geological storage conditions. According to the density of CO 2 -free brine and apparent molar volume of CO 2 in brine, the equal density temperature (T e ) of CO 2 +Dagang brine solution was obtained at 464.67 K when pressure is 10 MPa, which means that the density of brine dissolved with CO 2 will be less than that of CO 2 -free brine when the temperature is higher than 464.67 K at 10 MPa. In this work the formation temperature of the Dagang oilfield reservoir is from 313.15 K to 363.15 K, which is lower than the equal density temperature. Therefore, the safety of CO 2 storage in Dagang oilfield reservoir can be guaranteed.

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“…This expression is valid for the ranges of pressure, temperature and salt concentration that we are studying 43 . We used the following empirical correlation for the dependence of the dimensionless Henry's constantĤ CO 2 = H CO 2 / (10 6…”

Section: Conditionsmentioning

confidence: 99%

Impact of pressure, salt concentration, and temperature on the convective dissolution of carbon dioxide in aqueous solutions

Loodts

Rongy

Wit

2014

Chaos: An Interdisciplinary Journal of Nonlinear Science

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The convective dissolution of carbon dioxide (CO 2 ) in salted water is theoretically studied to determine how parameters such as CO 2 pressure, salt concentration and temperature impact the short-time characteristics of the buoyancy-driven instability.On the basis of a parameter-free dimensionless model, we perform a linear stability analysis of the time-dependent concentration profiles of CO 2 diffusing into the aqueous solution. We explicit the procedure to transform the predicted dimensionless growth rate and wavelength of the convective pattern into dimensional ones for typical laboratory-scale experiments in conditions close to room temperature and atmospheric pressure. This allows to investigate the implicit influence of the experimental parameters on the characteristic length and time scales of the instability. We predict that increasing CO 2 pressure, or decreasing salt concentration or temperature destabilizes the system, leading to a faster dissolution of CO 2 into salted water.PACS numbers: 47.20.Bp, 47.56.+r a) Electronic mail: vloodts@ulb.ac.be 1 When carbon dioxide (CO 2 ) dissolves in an aqueous solution, a buoyancy-driven fingering instability can develop because of the formation of a denser layer of CO 2 -rich solution on top of the less dense water. By a theoretical analysis, we predict how the short-time characteristics of this instability depend on experimental control parameters. To do so, we use a linear stability analysis based on a parameter-free model along with empirical correlations to compute the characteristic time and length scales of the fingering instability. We find that the growth rate of the convective instability increases with increasing CO 2 pressure or decreasing salt concentration or temperature. These results allow to interpret experimental data 1,2 on the impact of salt concentration and gaseous CO 2 pressure on the convective dissolution of CO 2 . Another main result of our analysis is that temperature has only a slight effect for CO 2 pressures close to atmospheric pressure. This study therefore suggests that carefully controlling the temperature of the setup is not needed for reproducibility of experimental studies of convective dissolution of CO 2 in laboratory conditions.

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Measurement and modeling of CO2 solubility in NaCl brine and CO2–saturated NaCl brine density

Cited by 207 publications

References 74 publications

Saturated phase densities of (CO 2 + H 2 O) at temperatures from (293 to 450) K and pressures up to 64 MPa

Saturated phase densities of (CO 2 + H 2 O) at temperatures from (293 to 450) K and pressures up to 64 MPa

Density measurement and equal density temperature of CO2+brine from Dagang — formation from 313 to 363 K

Impact of pressure, salt concentration, and temperature on the convective dissolution of carbon dioxide in aqueous solutions

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