Suggesting a numerical pressure-decay method for determining CO2 diffusion coefficient in water

Gholami, Yasin; Azin, Reza; Fatehi, Rouhollah; Osfouri, Shahriar

doi:10.1016/j.molliq.2015.06.060

Cited by 12 publications

(10 citation statements)

References 67 publications

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“…For quantitative analysis of the CO 2 diffusion, the diffusion of CO 2 in resident brines is tested with the constant-pressure method to provide more accurate (within 0.01%) results by taking into account the liquid phase swelling and unaffected by CO 2 compression . For the constant-pressure method, the diffusion coefficient is calculated by the changes in volume recorded during CO 2 dissolution and diffusion at constant temperature and pressure. − …”

Section: Methodsmentioning

confidence: 99%

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Experimental Study on the Density-Driven Carbon Dioxide Convective Diffusion in Formation Water at Reservoir Conditions

Tang

Wang

et al. 2019

ACS Omega

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Density-driven convection, which can accelerate the dissolution rate of carbon dioxide (CO 2 ) in resident brine, is critical for the long-term fate of the injected CO 2 permanence and security of CO 2 geological storage. Visualization experiments and pressure–volume–temperature (PVT) testing were conducted to investigate the influence from gravitational convection. For investigate gravitational instabilities and convective diffusion, we designed a Hele-Shaw cell rated to 70 MPa and Rayleigh number of 346 to conduct visualization experiments with the micro-schlieren technique. The average diffusion coefficient and time-dependent values were measured in the PVT experiments. We also calculated the convection parameters, including Rayleigh number and critical onset time, with a series of PVT testing at the temperature ranging 293.15–423.15 K and pressure ranging 14–24 MPa by using the constant-pressure method. Through visualization experiments, we observed convective currents triggered by the density gradient in the gas–liquid interface, which noticeably enhanced the CO 2 dissolution rate. The PVT testing confirmed that the diffusion coefficient increased sharply under the influence of the gravitational convection at the early stage and then decreased toward the average diffusion coefficient with time. The PVT testing also demonstrated the Rayleigh number increasing with temperature or pressure increasing under the reservoir conditions. The gravitational convection will be more likely to occur and more rapid with a greater pressure or higher temperature.

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Section: Methodsmentioning

confidence: 99%

“…47 For the constant-pressure method, the diffusion coefficient is calculated by the changes in volume recorded during CO 2 dissolution and diffusion at constant temperature and pressure. 63−66…”

Section: Experimental Sectionmentioning

confidence: 99%

Experimental Study on the Density-Driven Carbon Dioxide Convective Diffusion in Formation Water at Reservoir Conditions

Tang

Wang

et al. 2019

ACS Omega

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“…Before determining the number of electrons involved in this first reaction, it is needed to calculate the diffusion coefficient of CO2 in this solvent. Although, different methodologies have been previously applied for determining (DCO2), [44,45] in the current work we decide to use molecular dynamics (MD) simulations, which is an essential technique to study a variety of molecular properties including molecular diffusion.…”

Section: Voltammetry and Molecular Dynamics Simulationsmentioning

confidence: 99%

“…Employing molecular dynamics (MD) simulations for calculating diffusion coefficients is an appealing alternative to the experimental approaches, which very often include high cost or technical difficulties when high pressures and/or temperatures are involved. [44] Hence, in the current section it will be combined molecular electrochemistry and molecular dynamics tools for a first time.…”

Section: Voltammetry and Molecular Dynamics Simulationsmentioning

confidence: 99%

Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

Mena

Ribas

Richart

et al. 2021

Journal of Electroanalytical Chemistry

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“…Additionally, the diffusion and dissolution of multithermal fluids could induce heavy oil swelling and thus increase formation energy, which benefits the migration of heavy oil. Moreover, the diffusion and dissolution of CO 2 in both heavy oil and water could improve water–oil mobility ratio, thereby leading to increased volumetric sweep efficiency of water vapor and resultant enhanced heavy oil recovery. , Furthermore, the multithermal fluids are capable of inducing dissolved gas drive, therefore enhancing heavy oil recovery . Finally, the injected CO 2 in multithermal fluids always exists in supercritical state, which is provided with competitive diffusivity of gas and dissolving capability of liquid .…”

Section: Introductionmentioning

confidence: 99%

Diffusion and Dissolution Behaviors of CO₂, CH₄, and N₂ in Heavy Oil under High-Temperature and -Pressure Conditions: Insights into Heavy Oil Production via Multithermal Fluid Stimulation

Su,

Wang,

et al. 2023

Energy Fuels

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To comprehend heavy oil production well via the multithermal fluid stimulation technology, the diffusion and dissolution processes of CO2, CH4, and N2 in heavy oil were conducted under a temperature range of 308.15–423.15 K and bulk pressures up to 20 MPa. Accordingly, the diffusion coefficients and solubilities of CO2, CH4, and N2 were measured. Results indicated that the diffusion coefficients of CO2, CH4, and N2 in heavy oil increase with rising temperature and decrease with rising pressure. The diffusion capability of these fluids in heavy oil conforms to the order CH4 > CO2 > N2. Moreover, the solubility of CO2, CH4, and N2 in heavy oil is negatively related to temperature and positively related to pressure. The solubility of various fluids in heavy oil decreases in the sequence of CO2 > CH4 > N2. The diffusion and dissolution of CO2, CH4, and N2 could induce volume expansion, colloidal structure damage, intermolecular force alteration, gap filling, and light component extraction toward heavy oil, thereby promoting its quality and recovery. Overall, heavy oil production via the multithermal fluid stimulation technology is recommended to be implemented under high-temperature and -pressure conditions.

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Suggesting a numerical pressure-decay method for determining CO2 diffusion coefficient in water

Cited by 12 publications

References 67 publications

Experimental Study on the Density-Driven Carbon Dioxide Convective Diffusion in Formation Water at Reservoir Conditions

Experimental Study on the Density-Driven Carbon Dioxide Convective Diffusion in Formation Water at Reservoir Conditions

Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

Diffusion and Dissolution Behaviors of CO₂, CH₄, and N₂ in Heavy Oil under High-Temperature and -Pressure Conditions: Insights into Heavy Oil Production via Multithermal Fluid Stimulation

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Suggesting a numerical pressure-decay method for determining CO2 diffusion coefficient in water

Cited by 12 publications

References 67 publications

Experimental Study on the Density-Driven Carbon Dioxide Convective Diffusion in Formation Water at Reservoir Conditions

Experimental Study on the Density-Driven Carbon Dioxide Convective Diffusion in Formation Water at Reservoir Conditions

Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

Diffusion and Dissolution Behaviors of CO2, CH4, and N2 in Heavy Oil under High-Temperature and -Pressure Conditions: Insights into Heavy Oil Production via Multithermal Fluid Stimulation

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Product

Resources

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Diffusion and Dissolution Behaviors of CO₂, CH₄, and N₂ in Heavy Oil under High-Temperature and -Pressure Conditions: Insights into Heavy Oil Production via Multithermal Fluid Stimulation