Assessment of Geochemical Limitations to Utilizing CO<sub>2</sub> as a Cushion Gas in Compressed Energy Storage Systems

Iloejesi, Chidera; Beckingham, Lauren E.

doi:10.1089/ees.2020.0345

Cited by 16 publications

(11 citation statements)

References 59 publications

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“…Understanding mineral reactions and reaction rates in porous media is critical to assessing and predicting the transport in reactive environmental systems, including natural weathering processes, − contaminant transport, − CO 2 injection for storage , or enhanced oil recovery, − and compressed energy storage. , In these and other systems, mineral dissolution occurs due to perturbations from equilibrium.…”

Section: Introductionmentioning

confidence: 99%

Impact of Pore Connectivity on Quantification of Mineral Accessibility in Sandstone Samples

Salek

Qin

Asadi

et al. 2022

ACS Earth Space Chem.

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Characterization of microscale features and mineral distributions in rock samples can be facilitated non-destructively with imaging analysis. Scanning electron microscopy combined with backscattered electron and energy-dispersive spectroscopy is particularly valuable and can be utilized to identify minerals. Mineral segmentation coupled with quantitative image processing can yield mineral volume fractions and accessibility from these images. Prior estimates of mineral accessibility from images have improved the simulations of mineral reaction rates, but it is unclear how pore connectivity should be accounted for. This is further complex in samples with clay minerals where nanopores in clays need to be considered. Here, the impacts of different approaches to assess pore connectivity on quantification of mineral accessibility are considered for seven sandstone samples with varying composition. Mineral accessibilities are calculated by counting the interfacial pixels between the associated minerals and the adjacent pores from the 2D mineral segmented maps. Three types of accessibilities are considered: the first approach accounts for all the macropore space, the second approach considers only the 2D connected macropores, and the third approach includes the 2D connected porosity considering nanopores in clays. The observed variations in accessibility for most mineral phases are within 1 order of magnitude when nanopore connectivity is considered and thus not anticipated to largely impact the simulated reactivity of samples. However, greater variations were observed for clay minerals, which may impact long-term simulations (years). Larger variations in accessibility were also noted for carbonate minerals, but only some samples contained carbonate phases, and additional data is needed to assess the trends.

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Section: Introductionmentioning

confidence: 99%

Impact of Pore Connectivity on Quantification of Mineral Accessibility in Sandstone Samples

Salek

Qin

Asadi

et al. 2022

ACS Earth Space Chem.

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“…This phenomenon is also well known in acid mine drainage (Evangelou and Zhang, 1995). Numerical codes applied to predict the O 2 (g) impact showed that the reaction of carbonate and plagioclase minerals could limit the acidification of the solutions Iloejesi and Beckingham, 2021a;Pearce et al, 2022). Fe-(hydr)oxides precipitation has been observed in response to the release of Fe in the water phase and the oxidizing conditions (Pearce et al, 2016), which could induce pyrite passivation (Berta et al, 2016;Wang and Bauer, 2019).…”

Section: Introductionmentioning

confidence: 78%

Assessment of the oxygen reactivity in a gas storage facility by multiphase reactive transport modeling of field data for air injection into a sandstone reservoir in the Paris Basin, France

Sin

Windt

Banc

et al. 2023

Science of The Total Environment

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“…Geochemical reactions occur in a variety of environmental systems, such as chemical weathering on the surface of the earth, − CO 2 –brine–mineral interactions in carbon capture and storage systems, − enhanced oil recovery, − and subsurface energy storage systems. − These reactions are rather complex as natural environmental systems are often heterogeneous. For example, the CO 2 -induced geochemical reactions in subsurface storage systems are impacted by many factors, such as injection rate, formation depth, porosity, permeability, saturation, mineral composition, etc …”

Section: Introductionmentioning

confidence: 99%

Estimation of Mineral Accessible Surface Area from Mineral Abundance and Clay Content

Qin

Salek

Asadi

et al. 2023

ACS Earth Space Chem.

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The mineral reactive surface area is often quantified through a wide range of approaches (e.g., Brunauer−Emmett− Teller adsorption, geometry approximation, and imaging techniques). As such, values vary 1−5 orders of magnitude which can result in large discrepancies when used in reactive transport models to simulate geochemical reaction rates. Simulations carried out using mineral accessible surface areas (ASAs) determined from a coupled 2D and 3D imaging approach have shown better match with reaction rates measured in core-flood experiments. However, such image processing requires large amounts of time and resources. In this work, the possibility of estimating mineral ASAs from easily measured properties like mineral abundance and porosity is explored. Six sandstone samples of varying compositions were studied along with data from three additional samples from the previous literature. Mineral ASAs were quantified using a combined 2D scanning electron microscopy and 3D X-ray nano-computed tomography imaging approach. Sample properties like mineral accessibility, mineral ASAs, connected porosity, and clay content were compared to explore potential correlations between properties. Overall, it was observed that mineral accessibility can be predicted where feldspar mineral accessibility generally increases with increasing abundance and quartz accessibility decreases with increasing clay content. Mineral ASAs vary between samples, depending on the relative abundance of minerals and overall pore connectivity. While the ASA of quartz decreases with abundance, albite and carbonate mineral ASAs increase with abundance. Quantitative observations, including predictive relationships for ASAs from porosity and mineral volume fraction, are developed. Estimations of ASAs and mineral accessibility from more easily quantifiable properties can largely reduce the required extent of image analysis.

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Assessment of Geochemical Limitations to Utilizing CO₂ as a Cushion Gas in Compressed Energy Storage Systems

Cited by 16 publications

References 59 publications

Impact of Pore Connectivity on Quantification of Mineral Accessibility in Sandstone Samples

Impact of Pore Connectivity on Quantification of Mineral Accessibility in Sandstone Samples

Assessment of the oxygen reactivity in a gas storage facility by multiphase reactive transport modeling of field data for air injection into a sandstone reservoir in the Paris Basin, France

Estimation of Mineral Accessible Surface Area from Mineral Abundance and Clay Content

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Assessment of Geochemical Limitations to Utilizing CO2 as a Cushion Gas in Compressed Energy Storage Systems

Cited by 16 publications

References 59 publications

Impact of Pore Connectivity on Quantification of Mineral Accessibility in Sandstone Samples

Impact of Pore Connectivity on Quantification of Mineral Accessibility in Sandstone Samples

Assessment of the oxygen reactivity in a gas storage facility by multiphase reactive transport modeling of field data for air injection into a sandstone reservoir in the Paris Basin, France

Estimation of Mineral Accessible Surface Area from Mineral Abundance and Clay Content

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Assessment of Geochemical Limitations to Utilizing CO₂ as a Cushion Gas in Compressed Energy Storage Systems