Water reactivity in the liquid and supercritical CO2 phase: Has half the story been neglected?

McGrail, B.P.; Schaef, Herbert T.; Glezakou, Vassiliki‐Alexandra; Dang, Liem X.; Owen, Antionette T.

doi:10.1016/j.egypro.2009.02.131

Cited by 154 publications

(113 citation statements)

References 14 publications

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“…From an environmental and sequestration perspective, this is the most desirable outcome for CO 2 intrusion into near surface environments because of the immobility of carbonate minerals compared to other CO 2 trapping mechanisms. Several studies have demonstrated mineralogical trapping of CO 2 under conditions associated with deep geologic CO 2 storage, but such assessments have not been considered in near surface environments due to thermodynamic and kinetic limitations (Loring et al 2011;McGrail et al 2009;Bearat et al 2006;Oldenburg and Unger 2003).…”

Section: Co 2 Re-sequestrationmentioning

confidence: 99%

“…The distribution of CO 2 between the supercritical plume and aqueous phase (CO 2 sequestered via solubility trapping) will depend on aquifer temperature and pressure, as well as formation water composition (Celia and Nordbotten 2009;Bachu 2003;Duan and Sun 2003;Kharaka et al 2006). The reactivity of both phases towards geologic and manmade materials (e.g., cement and steel used in well construction) has been extensively studied under conditions consistent with deep storage formations (Loring et al 2011;McGrail et al 2009;Bearat et al 2006;Shao et al 2010aShao et al , 2010bShao et al , 2011Hu et al 2011;Jacquemet et al 2008;Kutchko et al 2007Kutchko et al , 2008Kutchko et al , 2009Lu et al 2011;Regnault et al 2005;Palandri et al 2005;Soong et al 2004;Kaszuba et al 2003;Sorai et al 2003). Although results from some of these studies are discussed in this report, reactions in deep storage aquifers are not the primary focus of this review.…”

Section: Carbon Dioxide In Subsurface Environmentsmentioning

confidence: 99%

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Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Harvey¹,

Qafoku²,

Cantrell³

et al. 2012

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Leakage from deep storage reservoirs is a major risk factor associated with geologic sequestration of carbon dioxide (CO 2 ). Different scientific theories exist concerning the potential implications of such leakage for near-surface environments. The authors of this report reviewed the current literature on how CO 2 leakage (from storage reservoirs) would likely impact the geochemistry of near surface environments such as potable water aquifers and the vadose zone.Experimental and modeling studies highlighted the potential for both beneficial (e.g., CO 2 re-sequestration or contaminant immobilization) and deleterious (e.g., contaminant mobilization) consequences of CO 2 intrusion in these systems. Current knowledge gaps, including the role of CO 2 -induced changes in redox conditions, the influence of CO 2 influx rate, gas composition, organic matter content and microorganisms are discussed in terms of their potential influence on pertinent geochemical processes and the potential for beneficial or deleterious outcomes.Geochemical modeling was used to systematically highlight why closing these knowledge gaps are pivotal. A framework for studying and assessing consequences associated with each factor is also presented in Section 5.6. v

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Section: Co 2 Re-sequestrationmentioning

confidence: 99%

Section: Carbon Dioxide In Subsurface Environmentsmentioning

confidence: 99%

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Harvey¹,

Qafoku²,

Cantrell³

et al. 2012

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“…Mineral precipitation and dissolution reactions under low-water CO 2 conditions have received much less attention than those of aqueous-phase-dominated systems [18], although the waterbearing CO 2 phase (i.e., water dissolved in CO 2 ) can mediate chemical reactions [40]. Recent work shows a dependency between of carbonation of a magnesium silicate mineral (i.e., forsterite) and brucite on water content in CO 2 [7,10,[31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Fundamental study of CO2-H2O-mineral interactions for carbon sequestration, with emphasis on the nature of the supercritical fluid-mineral interface.

Bryan¹,

Dewers²,

Heath³

et al. 2013

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In the supercritical CO 2 -water-mineral systems relevant to subsurface CO 2 sequestration, interfacial processes at the supercritical fluid-mineral interface will strongly affect core-and reservoir-scale hydrologic properties. Experimental and theoretical studies have shown that water films will form on mineral surfaces in supercritical CO 2 , but will be thinner than those that form in vadose zone environments at any given matric potential. The theoretical model presented here allows assessment of water saturation as a function of matric potential, a critical step for evaluating relative permeabilities the CO 2 sequestration environment. The experimental water adsorption studies, using Quartz Crystal Microbalance and Fourier Transform Infrared Spectroscopy methods, confirm the major conclusions of the adsorption/condensation model. Additional data provided by the FTIR study is that CO 2 intercalation into clays, if it occurs, does not involve carbonate or bicarbonate formation, or significant restriction of CO 2 mobility.We have shown that the water film that forms in supercritical CO 2 is reactive with common rock-forming minerals, including albite, orthoclase, labradorite, and muscovite. The experimental data indicate that reactivity is a function of water film thickness; at an activity of water of 0.9, the greatest extent of reaction in scCO 2 occurred in areas (step edges, surface pits) where capillary condensation thickened the water films. This suggests that dissolution/precipitation reactions may occur preferentially in small pores and pore throats, where it may have a disproportionately large effect on rock hydrologic properties.Finally, a theoretical model is presented here that describes the formation and movement of CO 2 ganglia in porous media, allowing assessment of the effect of pore size and structural heterogeneity on capillary trapping efficiency. The model results also suggest possible engineering approaches for optimizing trapping capacity and for monitoring ganglion formation in the subsurface. 6 ACKNOWLEDGMENTS

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“…[49,50] and even irreversible [51]. Mineral precipitation and dissolution reactions under low-water CO 2 conditions have received much less attention than those of the aqueous-phase-dominated (CO 2 dissolved in water) systems [31], although the water-bearing CO 2 (water dissolved in liquid or supercritical CO 2 ) phase can mediate important geochemical reactions as well [52]. No short-term CO 2 -induced mineralogical changes have been reported so far for dry shale or pure minerals.…”

Section: Ultramaficsmentioning

confidence: 99%

Mineralization of Carbon Dioxide: A Literature Review

et al. 2015

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Research on carbon capture and storage has been focused on CO 2 storage in geologic formations, with many potential risks. An alternative to conventional geologic storage is carbon mineralization, where CO 2 is reacted with metal cations to form carbonate minerals. Mineralization methods can be broadly divided into two categories: in situ and ex situ. In situ mineralization, or mineral trapping, is a component of underground geologic sequestration, in which a portion of the injected CO 2 reacts with alkaline rock present in the target formation to form solid carbonate species. In ex situ mineralization, the carbonation reaction occurs above ground, within a separate reactor or industrial process. This literature review is meant to provide an update on the current status of research on CO 2 mineralization.

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Water reactivity in the liquid and supercritical CO2 phase: Has half the story been neglected?

Cited by 154 publications

References 14 publications

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Geochemical Implications of CO2 Leakage Associated with Geologic Storage: A Review

Fundamental study of CO2-H2O-mineral interactions for carbon sequestration, with emphasis on the nature of the supercritical fluid-mineral interface.

Mineralization of Carbon Dioxide: A Literature Review

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