Review of CO2 sequestration mechanism in saline aquifers

Luo, Ang; Li, Yongming; Chen, Xi; Zhu, Zhongyi; Yu, Peng

doi:10.1016/j.ngib.2022.07.002

Cited by 47 publications

(21 citation statements)

References 63 publications

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“…2010; Luo et al. 2022), which gives a density difference of approximately . In situ measurements indicate the typical geothermal gradient in the range of (Rao et al.…”

Section: Governing Equations and Numerical Detailsmentioning

confidence: 99%

“…2015; Luo et al. 2022), and the density increment due to the CO dissolution can be from up to approximately (Bachu & Adams 2003; Pau et al. 2010; Luo et al.…”

Section: Governing Equations and Numerical Detailsmentioning

confidence: 99%

“…Typical values of the viscosity and density of the pore fluid are μ = 10 −4 -10 −3 Pa s and ρ 0 = 945-1273 kg m −3 , respectively (Bachu & Carroll 2005;Huppert & Neufeld 2014). The solubility of CO 2 in the pore fluid depends on the pressure, temperature and salinity of the brine (Bentham & Kirby 2005;Bachu 2015;De Silva et al 2015;Luo et al 2022), and the density increment due to the CO 2 dissolution can be from 0.1 % up to approximately 3 % (Bachu & Adams 2003;Pau et al 2010;Luo et al 2022), which gives a density difference of approximately Δρ S = 1-30 kg m −3 . In situ measurements indicate the typical geothermal gradient in the range of G = 20-65 • C km −1 (Rao et al 2001;Bachu & Stewart 2002;Nordbotten et al 2005;Kopp et al 2009;Yang et al 2010;De Silva et al 2015).…”

Section: Physical Properties Of the Fluid And Reservoirsmentioning

confidence: 99%

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Effects of the geothermal gradient on the convective dissolution in CO₂sequestration

Yang

2023

J. Fluid Mech.

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Convective dissolution is an important mechanism for long-term CO $_2$ sequestration in deep saline aquifers. The presence of an unstable geothermal gradient can affect the process of dissolution. In this paper, we present direct numerical simulations in a three-dimensional porous medium at three different concentration Rayleigh numbers $Ra_S$ with a set of thermal Rayleigh numbers $Ra_T$ . Simulations reveal that the flow structures alter when ${\textit {Ra}}_T$ increases for a fixed ${\textit {Ra}}_S$ . Strong thermal gradient can yield large-scale convection rolls which change the horizontal distribution and motions of concentration fingers. The time evolution of fluxes also has different responses to different ${\textit {Ra}}_T$ . A theoretical model is developed and successfully describes the evolution of concentration flux and volume averaged concentration during the final shutdown stage. We further calculate the dissolved CO $_2$ into the interior over time, which shows non-monotonic variations as ${\textit {Ra}}_T$ increases. At the end of our simulations, the maximum increment of dissolved CO $_2$ occurs when density ratio is around unity for all three concentration Rayleigh numbers we have explored. We apply our results to a typical geological reservoir and discuss their implications.

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“…2010; Luo et al. 2022), which gives a density difference of approximately . In situ measurements indicate the typical geothermal gradient in the range of (Rao et al.…”

Section: Governing Equations and Numerical Detailsmentioning

confidence: 99%

“…2015; Luo et al. 2022), and the density increment due to the CO dissolution can be from up to approximately (Bachu & Adams 2003; Pau et al. 2010; Luo et al.…”

Section: Governing Equations and Numerical Detailsmentioning

confidence: 99%

Section: Physical Properties Of the Fluid And Reservoirsmentioning

confidence: 99%

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Effects of the geothermal gradient on the convective dissolution in CO₂sequestration

Yang

2023

J. Fluid Mech.

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“…70 As for numerical simulation, research on single-phase, uniform, and two-dimensional models has been relatively mature, but there are still difficulties in establishing models that are close to the actual situation. 71 This is because most models ignore the influence of gravity and assume that CO 2 at the top is static.…”

Section: Co (G) H O H Co H Co H Hcomentioning

confidence: 99%

Recent Advances in Geological Storage: Trapping Mechanisms, Storage Sites, Projects, and Application of Machine Learning

Feng

et al. 2023

Energy Fuels

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A significant amount of carbon dioxide (CO2) is being released into the atmosphere as a result of the acceleration of industrialization and increased energy consumption, which are causing a rise in world temperatures. Despite the fact that nations all over the world have actively participated in CO2 storage projects, there is still not enough to moderate global temperatures. Therefore, there is an urgent need for the development of CO2 sequestration technologies. The main geological storage trapping mechanisms are discussed in this work along with an analysis of the major influencing variables. Additionally, the benefits and drawbacks of significant storage locations and current research hotspots are explored. Storage project development across the globe is outlined. The use of machine learning for CO2 sequestration is reviewed toward the end. This extensive review reveals that the main variables affecting CO2 capture capacity are hydrodynamic and geochemical. The sequestration capability of various storage sites is significantly influenced by the reservoir characteristics and implementation methodologies. The successful implementation of the storage project is determined by local policies and public support. The development of machine learning technologies makes storage projects safer and more dependable.

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“…Nevertheless, an important question remains: what should be done with the captured CO 2 ? Carbon sequestration, a technology that allows CO 2 to be trapped into the rock layers of the ground ,− is one possible approach. Shales, coals, or saline aquifers are examples of rock formations where CO 2 sequestration is possible.…”

Section: Introductionmentioning

confidence: 99%

New Insights on Catalytic Valorization of Carbon Dioxide by Conventional and Intensified Processes

Olivier

Desgagnés

Mercier

et al. 2023

Ind. Eng. Chem. Res.

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Carbon capture is an emerging technology that is often mentioned as a potential solution to the global warming crisis. However, most of the captured carbon is now treated as waste, discarded, and not used in any meaningful way. On the other hand, from a sustainable development point of view, CO 2 valorization could be a very appealing approach that offers an economic potential when this compound is recycled into valuable chemical products. In this regard, this state-of-the-art review encompasses a wide range of different processes to achieve the conversion of CO 2 into a large variety of products. It does not focus solely on a specific reaction or method, but rather brings different aspects together to provide a far more complete portrait of this emerging subject. Several methods and approaches are discussed, namely thermochemical, electrochemical, photochemical, photoelectrochemical, biochemical, and plasma-assisted conversion. The current state of CO 2 valorization, as well as emerging alternatives and stimulating prospects, was examined, while bearing in mind the realities that limit the application of such technologies. Special emphasis was placed on the optimization of reaction conditions and the development of materials that ensure the best possible production of valuable and environmentally friendly compounds from CO 2 . This review also highlights the challenges related to the application of CO 2 valorization at an industrial scale, which are also important in directing further research in this domain and assessing the prospects of these technologies. Due to the growing number of published papers on the subject, and the limited number of papers offering such a large perspective, we thus believe that this review will be a valuable addition to guide all researchers involved in the field of CO 2 valorization, but also for industrial and political leaders interested in investing in and developing these promising new technologies.

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Review of CO2 sequestration mechanism in saline aquifers

Cited by 47 publications

References 63 publications

Effects of the geothermal gradient on the convective dissolution in CO₂sequestration

Effects of the geothermal gradient on the convective dissolution in CO₂sequestration

Recent Advances in Geological Storage: Trapping Mechanisms, Storage Sites, Projects, and Application of Machine Learning

New Insights on Catalytic Valorization of Carbon Dioxide by Conventional and Intensified Processes

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Review of CO2 sequestration mechanism in saline aquifers

Cited by 47 publications

References 63 publications

Effects of the geothermal gradient on the convective dissolution in CO2sequestration

Effects of the geothermal gradient on the convective dissolution in CO2sequestration

Recent Advances in Geological Storage: Trapping Mechanisms, Storage Sites, Projects, and Application of Machine Learning

New Insights on Catalytic Valorization of Carbon Dioxide by Conventional and Intensified Processes

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Product

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Effects of the geothermal gradient on the convective dissolution in CO₂sequestration

Effects of the geothermal gradient on the convective dissolution in CO₂sequestration