Towards defining reasonable minimum composition thresholds – Impacts of variable CO2 stream compositions on transport, injection and storage

Rütters, Heike; Fischer, Sebastian; Hoa, Le Quynh; Bettge, Dirk; Bäßler, Ralph; Maßmann, Jobst; Ostertag-Henning, Christian; Wolf, Jan Lennard; Pumpa, Martin; Lubenau, Udo; Knauer, Sandra; Jaeger, Philip; Neumann, Andreas; Svensson, Kristoff; Pöllmann, Herbert; Lempp, Christof; Menezes, Flora Feitosa; Hagemann, Birger

doi:10.1016/j.ijggc.2022.103589

Cited by 8 publications

(1 citation statement)

References 36 publications

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“…CO 2 streams can be sourced from one or several industrial sources including coal combustion, natural gas processing, direct air capture, blue hydrogen production, and steel or cement production (Talman, 2015;Tsuji et al, 2021). These industrial CO 2 streams may contain impurities, such as ancillary gases including SOx, NOx, H 2 S, O 2 , or CH 4 (Porter et al, 2015;Harkin et al, 2017;Rütters et al, 2022). The trace metal mobilization response to impure CO 2 injection is even less well known than that from pure CO 2 injection (Pearce et al, 2015a;Marcon and Kaszuba, 2015;Pearce et al, 2019d).…”

Section: Introductionmentioning

confidence: 99%

Metal Mobilization From CO2 Storage Cap-Rocks: Experimental Reactions With Pure CO2 or CO2 SO2 NO

et al. 2022

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CO2 geological storage will be needed as part of the transition to lower greenhouse gas emissions. During CO2 storage, the mobilization of metals from minerals to formation water via CO2 water rock reactions may be a concern for water quality. The sources, behavior, and fate of metals, however, are not well understood. Metals in minerals of calcite cemented sandstone, feldspar-rich sandstone, and ironstone seal drill cores from a target storage site were characterized. The cores were reacted with low-salinity water and pure supercritical CO2 or impure CO2 with SO2 and nitric oxide (NO), under reservoir conditions. Calcite cemented core underwent calcite dissolution with chlorite, plagioclase, and sulfide alteration. The highest concentrations of calcium and manganese were released in the reaction of calcite cemented sandstone seal, with the lowest mobilized arsenic concentration. Pure CO2 reaction of the feldspar-rich sandstone seal resulted in calcite dissolution, with plagioclase, chlorite, kaolinite, illite, and sulfides corroded. Impure CO2 reaction of the feldspar-rich sandstone led to additional corrosion of apatite, pyrite, and sphalerite cements. Generally, dissolved iron, lead, zinc, and arsenic were released and then re-precipitated in oxide minerals or adsorbed. Calcium, manganese, and strontium were released primarily from calcite cement dissolution. Plagioclase corrosion was a second source of dissolved strontium, and chlorite dissolution a second source of manganese. Although sulfides contained higher concentrations of metals, the higher reactivity of carbonates meant that the latter were the main sources contributing to dissolved metal concentrations. The mineral content of the seal cores, and the injected gas mixture, had an impact on the type and concentration of metals released. The ubiquitous presence of carbonate minerals means that this study is applicable to understanding the potential risk factors for water quality changes, and the mobilization and fate of environmentally regulated metals, in both CO2 storage complexes and overlying drinking water aquifers worldwide.

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Section: Introductionmentioning

confidence: 99%

Metal Mobilization From CO2 Storage Cap-Rocks: Experimental Reactions With Pure CO2 or CO2 SO2 NO

et al. 2022

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Interfacial tension of tri-ethylene glycol-water mixtures in carbon dioxide at elevated pressures

Ibeh

Jaeger²

2023

J Petrol Explor Prod Technol

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The study of interfacial tension (IFT) of fluid/liquid systems is vital to optimize the design and operation of liquid-fluid contactors, and in this case, the design and performance of carbon dioxide (CO2) dehydration by absorption using tri-ethylene glycol (TEG). Several studies on improving CO2 dehydration with an absorption column containing TEG focused on system simulation and modeling but so far neglect the impact of interfacial tension of TEG–CO2 on the overall system performance. This study analyzes the interfacial tension, fluid mixture densities and drop volumes of TEG and TEG + water in CO2 medium. The pendant drop and the oscillating u-tube methods with a high-pressure densitometer were used to measure the IFT and the mixture densities of TEG–CO2 and TEG + water–CO2, respectively, at temperatures ranging from 10 °C to 50 °C and pressures up to 250 bars. The saturated TEG–CO2 and TEG + water–CO2 densities were used to evaluate the IFT from recorded drop profiles. The static IFT of TEG–CO2 shows a strongly decreasing trend from above 40 mN/m to less than 5 mN/m as the pressure increases up to 250 bars at a constant temperature (30 °C) but strongly increases by a factor of nearly 6 as the temperature is raised from 10 °C to 50 °C at a fixed pressure of 70 bars. The same trend is observed for IFT of TEG–water–CO2, although a slight increase in IFT $$(\sim$$ ( ∼ 2 mN/m) is observed due a water content of 5 wt% which would have a negative effect on the mass transfer efficiency. Conversely, a lower interfacial tension at higher pressures and lower temperatures favors the formation of a larger interface which is advantageous for mass transfer. Dynamic IFT of TEG–CO2 attains a constant after around 5 min at 70 bars and 50 °C while the drop volume increases leveling off after 10 min corresponding to a volumetric expansion of nearly 14% which corresponds to a CO2 solubility in TEG of 14%. The drop volume of a pendant drop at higher pressures hardly depends on temperature due to the superposed counteracting effects of a slightly increasing buoyancy and slightly dropping IFT. For a process design, static values of IFT can be applied with a reasonable precision, e.g., for using We-correlations to estimate drop sizes.

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Impure CO2 storage reactions of sandstone, mudstone and carbonate cemented cores: Experimental CO2 SO2 NOX O2 reaction metal mobilisation and fate

Pearce,

Dawson,

Brink

et al. 2023

International Journal of Coal Geology

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Towards defining reasonable minimum composition thresholds – Impacts of variable CO2 stream compositions on transport, injection and storage

Cited by 8 publications

References 36 publications

Metal Mobilization From CO2 Storage Cap-Rocks: Experimental Reactions With Pure CO2 or CO2 SO2 NO

Metal Mobilization From CO2 Storage Cap-Rocks: Experimental Reactions With Pure CO2 or CO2 SO2 NO

Interfacial tension of tri-ethylene glycol-water mixtures in carbon dioxide at elevated pressures

Impure CO2 storage reactions of sandstone, mudstone and carbonate cemented cores: Experimental CO2 SO2 NOX O2 reaction metal mobilisation and fate

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