Experimental Measurement of CO<sub>2</sub>Solubility in a 1 mol/kgw CaCl<sub>2</sub>Solution at Temperature from 323.15 to 423.15 K and Pressure up to 20 MPa

Poulain, Marie; Messabeb, Hamdi; Contamine, François; Cézac, Pierre; Serin, Jean-Paul; Dupin, Jean‐Charles; Martínez, Hervé

doi:10.1002/9781119363804.ch9

Cited by 3 publications

(2 citation statements)

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“…CO2 solubility in single-salt aqueous solutions such as NaCl, CaCl2 and Na2SO4 under CCS conditions is well documented [13][14][15][16][17][18] . The CO2-H2O-NaCl is the most investigated system, more than 1500 solubility points for pressure up 140 MPa, temperature comprises between 273.15-723.15 K and a molality up to 6 mol/kg have been published 4,13,17,[19][20][21][22][23][24][25] .…”

Section: Introductionmentioning

confidence: 99%

“…CO 2 solubility in single-salt aqueous solutions such as NaCl, CaCl 2 , and Na 2 SO 4 under CCS conditions is well documented. − The CO 2 –H 2 O–NaCl system is the most investigated system, with more than 1500 solubility points for pressure up 140 MPa, temperature between 273.15 and 723.15 K, and a molality up to 6 mol/kg having been published. ,,,− As far as the CO 2 –H 2 O–Na 2 SO 4 system is concerned, to our knowledge 450 solubility points are available in the literature for pressure up to 20 MPa, a temperature range of 288.15–423.15 K and a molality 0.1–2.7 mol/kg. ,− The CO 2 –H 2 O–CaCl 2 system has been investigated as well: more than 450 points were collected. On the other hand, the literature regarding the CO 2 –H 2 O–MgCl 2 is practically scarce.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Measurements of CO₂ Solubility in Aqueous MgCl₂ Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

et al. 2021

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Experimental CO2 solubility data in brine at high temperatures and pressures are important for CO2 capture and storage (CCS) applications. Many data has been acquired in single-salt aqueous solutions such as NaCl, CaCl2 and Na2SO4. CO2 solubility data in aqueous solutions containing MgCl2 are extremely scarce. In this work, new experimental data of CO2 solubility in MgCl2 solutions were acquired. Thirty-three experimental points of CO2 solubility have been reported in an original range of pressure (1.5 to 20 MPa), temperature (323.15, 373.15 and 423.15 K) and salinity (1, 3 and 5 mol/kg). Measurements were made using the potentiometric titration method. Results show that the CO2 solubility increases with the evolution of pressure and decreases with the evolution of MgCl2 concentrations. A discussion about the salting-out effect on MgCl2 solutions is made, and a comparison is proposed on the same effect in aqueous systems containing calcium chloride. This work enriches the amount of experimental CO2 solubility data, aiming to help in the development of CO2 storage technology. We saw that, just like CaCl2, systems containing MgCl2 can strongly influence the amount of CO2 dissolved in aqueous solutions, consequently, in the gas storage capacity. And these experimental data can also be used to improve thermodynamic models that have parameters based on experimental data.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Measurements of CO₂ Solubility in Aqueous MgCl₂ Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

et al. 2021

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Experimental Determination of CO₂Solubility in Brines At High Temperatures and High Pressures and Induced Corrosion of Materials in Geothermal Equipment

Poulain

Dupin

Martínez

et al. 2020

Gas Injection Into Geological Formations and Related Topics

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Advancing CO2 Solubility Prediction in Brine Solutions with Explainable Artificial Intelligence for Sustainable Subsurface Storage

Shokrollahi,

Tatar,

Zeinijahromi

2024

Sustainability

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Underground CO2 storage is crucial for sustainability as it reduces greenhouse gas (GHG) emissions, helping mitigate climate change and protect the environment. This research explores the use of Explainable Artificial Intelligence (XAI) to enhance the predictive modelling of CO2 solubility in brine solutions. Employing Random Forest (RF) models, the study integrates Shapley Additive exPlanations (SHAP) analysis to uncover the complex relationships between key variables, including pressure (P), temperature (T), salinity, and ionic composition. Our findings indicate that while P and T are primary factors, the contributions of salinity and specific ions, notably chloride ions (Cl−), are essential for accurate predictions. The RF model exhibited high accuracy, precision, and stability, effectively predicting CO2 solubility even for brines not included during the model training as evidenced by R2 values greater than 0.96 for the validation and testing samples. Additionally, the stability assessment showed that the Root Mean Squared Error (RMSE) spans between 8.4 and 9.0 for 100 different randomness, which shows good stability. SHAP analysis provided valuable insights into feature contributions and interactions, revealing complex dependencies, particularly between P and ionic strength. These insights offer practical guidelines for optimising CO2 storage and mitigating associated risks. By improving the accuracy and transparency of CO2 solubility predictions, this research supports more effective and sustainable CO2 storage strategies, contributing to the overall goal of reducing greenhouse gas emissions and combating climate change.

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Experimental Measurement of CO₂Solubility in a 1 mol/kgw CaCl₂Solution at Temperature from 323.15 to 423.15 K and Pressure up to 20 MPa

Cited by 3 publications

References 16 publications

Experimental Measurements of CO₂ Solubility in Aqueous MgCl₂ Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

Experimental Measurements of CO₂ Solubility in Aqueous MgCl₂ Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

Experimental Determination of CO₂Solubility in Brines At High Temperatures and High Pressures and Induced Corrosion of Materials in Geothermal Equipment

Advancing CO2 Solubility Prediction in Brine Solutions with Explainable Artificial Intelligence for Sustainable Subsurface Storage

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Experimental Measurement of CO2Solubility in a 1 mol/kgw CaCl2Solution at Temperature from 323.15 to 423.15 K and Pressure up to 20 MPa

Cited by 3 publications

References 16 publications

Experimental Measurements of CO2 Solubility in Aqueous MgCl2 Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

Experimental Measurements of CO2 Solubility in Aqueous MgCl2 Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

Experimental Determination of CO2Solubility in Brines At High Temperatures and High Pressures and Induced Corrosion of Materials in Geothermal Equipment

Advancing CO2 Solubility Prediction in Brine Solutions with Explainable Artificial Intelligence for Sustainable Subsurface Storage

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Resources

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Experimental Measurement of CO₂Solubility in a 1 mol/kgw CaCl₂Solution at Temperature from 323.15 to 423.15 K and Pressure up to 20 MPa

Experimental Measurements of CO₂ Solubility in Aqueous MgCl₂ Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

Experimental Measurements of CO₂ Solubility in Aqueous MgCl₂ Solution at Temperature between 323.15 and 423.15 K and Pressure up to 20 MPa

Experimental Determination of CO₂Solubility in Brines At High Temperatures and High Pressures and Induced Corrosion of Materials in Geothermal Equipment