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Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage

Carbon capture and storage projects need to be greatly accelerated to attenuate the rate and degree of global warming. Due to the large volume of carbon that will need to be stored, it is likely that the bulk of this storage will be in the subsurface via geologic storage. To be effective, subsurface...

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Autores principales: Addassi, Mouadh, Omar, Abdirizak, Hoteit, Hussein, Afifi, Abdulkader M., Arkadakskiy, Serguey, Ahmed, Zeyad T., Kunnummal, Noushad, Gislason, Sigurdur R., Oelkers, Eric H.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9705318/
https://www.ncbi.nlm.nih.gov/pubmed/36443476
http://dx.doi.org/10.1038/s41598-022-24623-6
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author Addassi, Mouadh
Omar, Abdirizak
Hoteit, Hussein
Afifi, Abdulkader M.
Arkadakskiy, Serguey
Ahmed, Zeyad T.
Kunnummal, Noushad
Gislason, Sigurdur R.
Oelkers, Eric H.
author_facet Addassi, Mouadh
Omar, Abdirizak
Hoteit, Hussein
Afifi, Abdulkader M.
Arkadakskiy, Serguey
Ahmed, Zeyad T.
Kunnummal, Noushad
Gislason, Sigurdur R.
Oelkers, Eric H.
author_sort Addassi, Mouadh
collection PubMed
description Carbon capture and storage projects need to be greatly accelerated to attenuate the rate and degree of global warming. Due to the large volume of carbon that will need to be stored, it is likely that the bulk of this storage will be in the subsurface via geologic storage. To be effective, subsurface carbon storage needs to limit the potential for CO(2) leakage from the reservoir to a minimum. Water-dissolved CO(2) injection can aid in this goal. Water-dissolved CO(2) tends to be denser than CO(2)-free water, and its injection leads immediate solubility storage in the subsurface. To assess the feasibility and limits of water-dissolved CO(2) injection coupled to subsurface solubility storage, a suite of geochemical modeling calculations based on the TOUGHREACT computer code were performed. The modelled system used in the calculations assumed the injection of 100,000 metric tons of water-dissolved CO(2) annually for 100 years into a hydrostatically pressured unreactive porous rock, located at 800 to 2000 m below the surface without the presence of a caprock. This system is representative of an unconfined sedimentary aquifer. Most calculated scenarios suggest that the injection of CO(2) charged water leads to the secure storage of injected CO(2) so long as the water to CO(2) ratio is no less than ~ 24 to 1. The identified exception is when the salinity of the original formation water substantially exceeds the salinity of the CO(2)-charged injection water. The results of this study indicate that unconfined aquifers, a generally overlooked potential carbon storage host, could provide for the subsurface storage of substantial quantities of CO(2).
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spelling pubmed-97053182022-11-30 Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage Addassi, Mouadh Omar, Abdirizak Hoteit, Hussein Afifi, Abdulkader M. Arkadakskiy, Serguey Ahmed, Zeyad T. Kunnummal, Noushad Gislason, Sigurdur R. Oelkers, Eric H. Sci Rep Article Carbon capture and storage projects need to be greatly accelerated to attenuate the rate and degree of global warming. Due to the large volume of carbon that will need to be stored, it is likely that the bulk of this storage will be in the subsurface via geologic storage. To be effective, subsurface carbon storage needs to limit the potential for CO(2) leakage from the reservoir to a minimum. Water-dissolved CO(2) injection can aid in this goal. Water-dissolved CO(2) tends to be denser than CO(2)-free water, and its injection leads immediate solubility storage in the subsurface. To assess the feasibility and limits of water-dissolved CO(2) injection coupled to subsurface solubility storage, a suite of geochemical modeling calculations based on the TOUGHREACT computer code were performed. The modelled system used in the calculations assumed the injection of 100,000 metric tons of water-dissolved CO(2) annually for 100 years into a hydrostatically pressured unreactive porous rock, located at 800 to 2000 m below the surface without the presence of a caprock. This system is representative of an unconfined sedimentary aquifer. Most calculated scenarios suggest that the injection of CO(2) charged water leads to the secure storage of injected CO(2) so long as the water to CO(2) ratio is no less than ~ 24 to 1. The identified exception is when the salinity of the original formation water substantially exceeds the salinity of the CO(2)-charged injection water. The results of this study indicate that unconfined aquifers, a generally overlooked potential carbon storage host, could provide for the subsurface storage of substantial quantities of CO(2). Nature Publishing Group UK 2022-11-28 /pmc/articles/PMC9705318/ /pubmed/36443476 http://dx.doi.org/10.1038/s41598-022-24623-6 Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Addassi, Mouadh
Omar, Abdirizak
Hoteit, Hussein
Afifi, Abdulkader M.
Arkadakskiy, Serguey
Ahmed, Zeyad T.
Kunnummal, Noushad
Gislason, Sigurdur R.
Oelkers, Eric H.
Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
title Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
title_full Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
title_fullStr Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
title_full_unstemmed Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
title_short Assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
title_sort assessing the potential of solubility trapping in unconfined aquifers for subsurface carbon storage
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9705318/
https://www.ncbi.nlm.nih.gov/pubmed/36443476
http://dx.doi.org/10.1038/s41598-022-24623-6
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