Heterogeneous porosity distribution in Portland cement exposed to CO2-rich fluids

Rimmelé, Gaëtan; Barlet‐Gouédard, V.; Porcherie, Olivier; Goffé, Bruno; Brunet, Fabrice

doi:10.1016/j.cemconres.2008.03.022

Cited by 235 publications

(213 citation statements)

References 26 publications

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“…At the top is the polished section, SEM-BSE image in the middle, and local porosity profile generated from SEM-BSE image is in the bottom. Cited from (Rimmelé et al, 2008). .…”

Section: List Of Figuresmentioning

confidence: 99%

“…7.2 Geometry for simulating the work of (Rimmelé et al, 2008 7.3 Calculated aqueous CO 2 concentration profiles from 1 day to 6 weeks, simulating the work of (Rimmelé et al, 2008). ( 7.4 Calculated pH profiles from 1 day to 6 weeks, simulating the work of (Rimmelé et al, 2008).…”

Section: List Of Figuresmentioning

confidence: 99%

“…( 7.4 Calculated pH profiles from 1 day to 6 weeks, simulating the work of (Rimmelé et al, 2008). ( 7.5 Calculated liquid saturation degree from 1 day to 6 weeks, simulating the work of (Rimmelé et al, 2008).…”

Section: List Of Figuresmentioning

confidence: 99%

“…6.1 Different reaction zones for samples exposed to brine with pH = 2.4 (left) and 3.7 (right), at 323 K, from (Duguid and Scherer, 2010) 7.1 Experimental set up of (Rimmelé et al, 2008 …”

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Reactive transport modeling of CO2 through cementitious materials under CO2 geological storage conditions

Shen

2013

International Journal of Greenhouse Gas Control

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RésuméUn modèle de transport réactif est proposé pour simuler la réactivité des matériaux à base de ciment en contact avec une saumure saturée en CO 2 et/ou le CO 2 supercritique (CO 2 sc) dans les conditions de stockage géologique du CO 2 . Un code a été développé pour résoudre simultanément le transport et la chimie par une approche globale couplée, compte tenu de l'effet de la température et de la pression.La variabilité des propriétés du CO 2 sc avec la pression et la température, telles que la solubilité dans l'eau, la densité et la viscosité sont pris en compte. On suppose que tous les processus chimiques sont en équilibre thermodynamique. Les réactions de dissolution et de précipitation de la portlandite (CH) et Ce modèle est en mesure de simuler les processus de carbonatation des matériaux à base de ciment, dans des conditions à la fois saturés et insaturés, dans une large plage de concentration de CO 2 , de température et de pression. Plusieurs expériences, rapportées dans la littérature, sont simulées en utilisant divers types de conditions aux limites: (i) solutions saturées ou non en CO 2 et carbonate de calcium, (ii) gas supercritique de CO 2 . Les prédictions sont comparées avec les observations expérimentales. Certains II phénomènes observés expérimentalement peuvent être également expliqués par le modèle. Mots-clés:Carbonatation, CO 2 supercritique, Transports, Ciment, C-S-H, Décalcification, Pression, Température, Stockage du CO 2 . AbstractA reactive transport model is proposed to simulate the reactivity of cement based material in contact with CO 2 -saturated brine and supercritical CO 2 (scCO 2 ) under CO 2 geological storage conditions. This code is developed to solve simultaneously transport and chemistry by a global coupled approach, considering the effect of temperature and pressure.The variability of scCO 2 properties with pressure and temperature, such as solubility in water, density and viscosity are taken into account. It is assumed that all chemical processes are in thermodynamical equilibrium. Dissolution and precipitation reactions for portlandite (CH) and calcite (CC) are described by mass action laws and threshold of ion activity products in order to account for complete dissolved minerals. A chemical kinetics for the dissolution and precipitation of CH and CC is introduced to facilitate numerical convergence. One properly chosen variable is able to capture the precipitation and dissolution of the relevant phase. A generalization of the mass action law is developed and applied to calcium silicate hydrates (C-S-H) to take into account the continuous variation (decrease) of the Ca/Si ratio during the dissolution reaction of C-S-H. The changes in porosity and microstructure induced by the precipitation and dissolution reactions are also taken into account.Couplings between transport equations and chemical reactions are treated thanks to five mass balance equations written for each atom (Ca, Si, C, K, Cl) as well as one equation for charge balance and one for the total mass. Ion tran...

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“…At the top is the polished section, SEM-BSE image in the middle, and local porosity profile generated from SEM-BSE image is in the bottom. Cited from (Rimmelé et al, 2008). .…”

Section: List Of Figuresmentioning

confidence: 99%

Section: List Of Figuresmentioning

confidence: 99%

Section: List Of Figuresmentioning

confidence: 99%

“…6.1 Different reaction zones for samples exposed to brine with pH = 2.4 (left) and 3.7 (right), at 323 K, from (Duguid and Scherer, 2010) 7.1 Experimental set up of (Rimmelé et al, 2008 …”

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confidence: 99%

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Reactive transport modeling of CO2 through cementitious materials under CO2 geological storage conditions

Shen

2013

International Journal of Greenhouse Gas Control

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“…The solubility of water into CO 2 is also of importance, because it affects the reactivity of CO 2 with surrounding rocks (e.g., Regnault et al 2005;Rimmelé et al 2008;Lin et al 2008;Suto et al 2007) and determines the capacity of injected CO 2 to dry the rock formations adjacent to injection wells (Giorgis et al 2007;Hurter et al 2007;Pruess and Müller 2009). In the case of a CO 2 -based EGS, the partitioning of water into CO 2 would also determine the time required for the removal of water from the (central portion of the) EGS, and the type of chemical interactions that may take place between the CO 2 plume, reservoir rocks, and engineered systems.…”

Section: Introductionmentioning

confidence: 99%

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

2009

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Correlations are presented to compute the mutual solubilities of CO 2 and chloride brines at temperatures 12-300 • C, pressures 1-600 bar (0.1-60 MPa), and salinities 0-6 m NaCl. The formulation is computationally efficient and primarily intended for numerical simulations of CO 2 -water flow in carbon sequestration and geothermal studies. The phase-partitioning model relies on experimental data from literature for phase partitioning between CO 2 and NaCl brines, and extends the previously published correlations to higher temperatures. The model relies on activity coefficients for the H 2 O-rich (aqueous) phase and fugacity coefficients for the CO 2 -rich phase. Activity coefficients are treated using a Margules expression for CO 2 in pure water, and a Pitzer expression for salting-out effects. Fugacity coefficients are computed using a modified Redlich-Kwong equation of state and mixing rules that incorporate asymmetric binary interaction parameters. Parameters for the calculation of activity and fugacity coefficients were fitted to published solubility data over the P-T range of interest. In doing so, mutual solubilities and gas-phase volumetric data are typically reproduced within the scatter of the available data. An example of multiphase flow simulation implementing the mutual solubility model is presented for the case of a hypothetical, enhanced geothermal system where CO 2 is used as the heat extraction fluid. In this simulation, dry supercritical CO 2 at 20 • C is injected into a 200 • C hot-water reservoir. Results show that the injected CO 2 displaces the formation water relatively quickly, but that the produced CO 2 contains significant water for long periods of time. The amount of water in the CO 2 could have implications for reactivity with reservoir rocks and engineered materials.

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Status of CO₂storage in deep saline aquifers with emphasis on modeling approaches and practical simulations

et al. 2015

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Carbon capture and storage (CCS) is the only viable technology to mitigate carbon emissions while allowing continued large-scale use of fossil fuels. The storage part of CCS involves injection of carbon dioxide, captured from large stationary sources, into deep geological formations. Deep saline aquifers have the largest identified storage potential, with estimated storage capacity sufficient to store emissions from large stationary sources for at least a century. This makes CCS a potentially important bridging technology in the transition to carbon-free energy sources. Injection of CO 2 into deep saline aquifers leads to a multicomponent, multiphase flow system, in which geomechanics, geochemistry, and nonisothermal effects may be important. While the general system can be highly complex and involve many coupled, nonlinear partial differential equations, the underlying physics can sometimes lead to important simplifications. For example, the large density difference between injected CO 2 and brine may lead to relatively fast buoyant segregation, making an assumption of vertical equilibrium reasonable. Such simplifying assumptions lead to a range of simplified governing equations whose solutions have provided significant practical insights into system behavior, including improved estimates of storage capacity, easy-to-compute estimates of CO 2 spatial migration and pressure response, and quantitative estimates of leakage risk. When these modeling studies are coupled with observations from well-characterized injection operations, understanding of the overall system behavior is enhanced significantly. This improved understanding shows that, while economic and policy challenges remain, CO 2 storage in deep saline aquifers appears to be a viable technology and can contribute substantially to climate change solutions.

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Heterogeneous porosity distribution in Portland cement exposed to CO2-rich fluids

Cited by 235 publications

References 26 publications

Reactive transport modeling of CO2 through cementitious materials under CO2 geological storage conditions

Reactive transport modeling of CO2 through cementitious materials under CO2 geological storage conditions

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

Status of CO₂storage in deep saline aquifers with emphasis on modeling approaches and practical simulations

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Heterogeneous porosity distribution in Portland cement exposed to CO2-rich fluids

Cited by 235 publications

References 26 publications

Reactive transport modeling of CO2 through cementitious materials under CO2 geological storage conditions

Reactive transport modeling of CO2 through cementitious materials under CO2 geological storage conditions

A Phase-Partitioning Model for CO2–Brine Mixtures at Elevated Temperatures and Pressures: Application to CO2-Enhanced Geothermal Systems

Status of CO2storage in deep saline aquifers with emphasis on modeling approaches and practical simulations

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Product

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Status of CO₂storage in deep saline aquifers with emphasis on modeling approaches and practical simulations