Dissolution and reaction in a CO2-brine-clay mineral particle system under geological CO2 sequestration from subcritical to supercritical conditions

Pil Rip Jeon; Doo Wook Kim; Chang Ha Lee

doi:10.1016/j.cej.2018.04.052

Dissolution and reaction in a CO₂-brine-clay mineral particle system under geological CO₂ sequestration from subcritical to supercritical conditions

Pil Rip Jeon, Doo Wook Kim, Chang Ha Lee

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

To support effective geological CO₂ sequestration design and operation, dissolution and reaction in CO₂-brine-clay mineral particle systems (sepiolite and montmorillonite) were studied under subcritical to supercritical CO₂ conditions (10 bar to 150 bar at 45 °C and 65 °C). The order of ion dissolution from the framework of sepiolite in the brine was slightly different under each experimental condition, whereas the order of dissolved ion concentration from the montmorillonite was not varied. The solubility of CO₂ was lower in the CO₂-brine-clay mineral particle system than in a CO₂-brine system. Precipitation of amorphous silica as a secondary mineral formation was observed after the reaction of both sepiolite and montmorillonite. The CO₂ solubility model, considering ion concentration and aqueous silica, reasonably predicted the CO₂ solubility from subcritical to supercritical conditions. The kinetic rate constant of the dissolution reaction of sepiolite was correlated with the initial pH of the brine. After reaction with high-pressure CO₂-saturated brine, the micro-crystallinity of sepiolite did not change, whereas the basal (0 0 1) plane of montmorillonite showed deformation in micro-crystallinity after the dissolution reaction. By contrast, reaction with the CO₂-saturated brine led to a decrease in the surface area of sepiolite and an increase in the surface area of montmorillonite.

Original language	English
Pages (from-to)	1-11
Number of pages	11
Journal	Chemical Engineering Journal
Volume	347
DOIs	https://doi.org/10.1016/j.cej.2018.04.052
Publication status	Published - 2018 Sept 1

Bibliographical note

Funding Information:
This work was supported by the Korea Carbon Capture & Sequestration R&D Center grant funded by the Ministry of Science, Information and Communication Technology and Future Planning of the Government of South Korea (no. 20120008929 ) and the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry & Energy of the Government of South Korea (no. 20158510011280 ). Appendix A

Publisher Copyright:
© 2018 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Industrial and Manufacturing Engineering

Access to Document

10.1016/j.cej.2018.04.052

Cite this

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title = "Dissolution and reaction in a CO2-brine-clay mineral particle system under geological CO2 sequestration from subcritical to supercritical conditions",

abstract = "To support effective geological CO2 sequestration design and operation, dissolution and reaction in CO2-brine-clay mineral particle systems (sepiolite and montmorillonite) were studied under subcritical to supercritical CO2 conditions (10 bar to 150 bar at 45 °C and 65 °C). The order of ion dissolution from the framework of sepiolite in the brine was slightly different under each experimental condition, whereas the order of dissolved ion concentration from the montmorillonite was not varied. The solubility of CO2 was lower in the CO2-brine-clay mineral particle system than in a CO2-brine system. Precipitation of amorphous silica as a secondary mineral formation was observed after the reaction of both sepiolite and montmorillonite. The CO2 solubility model, considering ion concentration and aqueous silica, reasonably predicted the CO2 solubility from subcritical to supercritical conditions. The kinetic rate constant of the dissolution reaction of sepiolite was correlated with the initial pH of the brine. After reaction with high-pressure CO2-saturated brine, the micro-crystallinity of sepiolite did not change, whereas the basal (0 0 1) plane of montmorillonite showed deformation in micro-crystallinity after the dissolution reaction. By contrast, reaction with the CO2-saturated brine led to a decrease in the surface area of sepiolite and an increase in the surface area of montmorillonite.",

author = "Jeon, {Pil Rip} and Kim, {Doo Wook} and Lee, {Chang Ha}",

note = "Funding Information: This work was supported by the Korea Carbon Capture & Sequestration R&D Center grant funded by the Ministry of Science, Information and Communication Technology and Future Planning of the Government of South Korea (no. 20120008929 ) and the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry & Energy of the Government of South Korea (no. 20158510011280 ). Appendix A Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

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N1 - Funding Information: This work was supported by the Korea Carbon Capture & Sequestration R&D Center grant funded by the Ministry of Science, Information and Communication Technology and Future Planning of the Government of South Korea (no. 20120008929 ) and the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry & Energy of the Government of South Korea (no. 20158510011280 ). Appendix A Publisher Copyright: © 2018 Elsevier B.V.

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N2 - To support effective geological CO2 sequestration design and operation, dissolution and reaction in CO2-brine-clay mineral particle systems (sepiolite and montmorillonite) were studied under subcritical to supercritical CO2 conditions (10 bar to 150 bar at 45 °C and 65 °C). The order of ion dissolution from the framework of sepiolite in the brine was slightly different under each experimental condition, whereas the order of dissolved ion concentration from the montmorillonite was not varied. The solubility of CO2 was lower in the CO2-brine-clay mineral particle system than in a CO2-brine system. Precipitation of amorphous silica as a secondary mineral formation was observed after the reaction of both sepiolite and montmorillonite. The CO2 solubility model, considering ion concentration and aqueous silica, reasonably predicted the CO2 solubility from subcritical to supercritical conditions. The kinetic rate constant of the dissolution reaction of sepiolite was correlated with the initial pH of the brine. After reaction with high-pressure CO2-saturated brine, the micro-crystallinity of sepiolite did not change, whereas the basal (0 0 1) plane of montmorillonite showed deformation in micro-crystallinity after the dissolution reaction. By contrast, reaction with the CO2-saturated brine led to a decrease in the surface area of sepiolite and an increase in the surface area of montmorillonite.

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