CO2 subsurface mineral storage by its co-injection with recirculating water
二酸化炭素の地下鉱物貯留：再循環水との同時注入による (AI 翻訳)
E. Oelkers, S. Arkadakskiy, Z. Ahmed, N. Kunnummal, J. Fedorik, M. Marchesi, M. Addassi, A. Omar, N. Menegoni, S. Gislason, G. Bjornsson, D. Berno, Thomas Finkbeiner, A. Afifi, H. Hoteit
🤖 gxceed AI 要約
日本語
本論文は、サウジアラビア西部の乾燥地域において、二酸化炭素（CO2）を地下の苦鉄質岩や超苦鉄質岩に鉱物化して貯留する実証試験を報告。従来、大量の水が必要とされたが、地下流体の再循環により外部水を不要にする手法を提案し、実現可能性を示した。水資源が限られた地域での炭素鉱物貯留の新たな道を開く。
English
This paper reports an industrial-scale pilot project in western Saudi Arabia that demonstrates CO2 mineral storage in mafic and ultramafic rocks using recirculated subsurface fluids, eliminating the need for external water. The approach addresses the water scarcity challenge for carbon mineralization in arid regions, showing feasibility for large-scale deployment.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本ではCCSがGX政策の一環として注目されているが、水資源が限られる地域での実装には課題がある。本論文の水再循環技術は、日本の地質条件への応用可能性を検討する上で参考になる。
In the global GX context
This study provides a breakthrough for CCS in arid regions where water is scarce, a common challenge for many global carbon storage projects. It demonstrates a scalable solution that could accelerate deployment of mineral carbon storage worldwide, aligning with net-zero goals.
👥 読者別の含意
🔬研究者:This paper offers a novel method for water-efficient CO2 mineralization, with implications for field-scale implementation in diverse geological settings.
🏢実務担当者:The water recirculation approach can inform CCS project design in water-constrained regions, reducing operational costs and environmental impact.
🏛政策担当者:The demonstrated feasibility of water-free mineral storage supports policy frameworks for CCS in arid regions, potentially expanding the geographic scope of carbon removal strategies.
📄 Abstract（原文）
Carbon capture and storage (CCS) has the potential to help nations meet their Paris Agreement CO2 reduction commitments1,2. The ability to capture CO2 within mafic and ultramafic rocks through mineralization of carbon is an example of such a CCS technology3,4, but large-scale deployment has yet to be achieved5,6. Each geologic environment in the Earth’s crust requires a distinct carbon storage solution. Whereas some regions of the subsurface contain saline aquifers and sedimentary traps suitable for traditional carbon storage through the injection of high-pressure, dense CO2 below impermeable caprocks, other regions may lack caprocks5–9. In these regions, carbon storage is possible through the mineralization of injected water-dissolved CO2 forming stable carbonate minerals through its reactions with reactive silicate rocks and minerals6,10,11. A notable challenge to applying this process at scale is that it can require 20–50 times or more water than the mass of CO2 stored12. Here we report on an industrial-scale pilot project designed to find a carbon disposal solution for western Saudi Arabia. This arid region has large point-source CO2 emitters, including petroleum refining and desalination facilities, but lacks saline aquifers and sedimentary traps13–17. We find that a CO2 injection approach based on the recirculation of subsurface fluids can eliminate the need for external water. Our results demonstrate the feasibility of carbon mineral storage in regions in which access to water resources may be limited.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1038/s41586-026-10130-5first seen 2026-05-05 23:56:17
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