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Injection of CO2-sa...
Injection of CO2-saturated brine in geological reservoir : A way to enhanced storage safety
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- Ahmad, Nawaz, 1972- (författare)
- KTH,Vattendragsteknik,Doctoral Program in Land and Water Resources Engineering
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- Wörman, Anders (författare)
- KTH,Vattendragsteknik
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- Sanchez-Vila, Xavier (författare)
- Universitat Politècnica de Catalunya, UPC-BarcelonaTech, 08034 Barcelona, Spain,Hydrogeology Group, Department of Geotechnical Engineering and Geosciences, Universitat Politècnica de Catalunya, UPC-BarcelonaTech, 08034 Barcelona, Spain
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- Jarsjö, Jerker (författare)
- Stockholm University, Sweden,Department of Physical Geography, The Bolin Centre for Climate Research, Stockholm University, SE-10691 Stockholm, Sweden
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- Bottacin-Busolin, Andrea (författare)
- School of Mechanical, Aerospace and Civil Engineering, University of Manchester, United Kingdom
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- Hellevang, Helge (författare)
- Department of Geosciences, University of Oslo, Pb. 1047, Blindern, Oslo, Norway
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Injection of free phase supercritical CO2 into deep geological reservoirs is associated with risk of considerable return flows towards the land surface due to the buoyancy of CO2, which is lighter than the resident brine in the reservoir. Such upward movements can be avoided if CO2 is injected in the dissolved phase (CO2aq). In this work, injection of CO2-saturated brine in a subsurface carbonate reservoir is modelled. Physical and geochemical interactions of injected low-pH CO2-saturated brine with the carbonate minerals (calcite, dolomite and siderite) are investigated in the reactive transport modelling. CO2-saturated brine, being low in pH, shows high reactivity with the reservoir minerals, resulting in a significant mineral dissolution and CO2 conversion in reactions. Over the injection period of 10 years, up to 16% of the injected CO2 is found consumed in geochemical reactions. Sorption included in the transport analysis resulted in additional quantities of CO2 mass stored. However, for the considered carbonate minerals, the consumption of injected CO2aq is found mainly in the form of ionic trapping.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Mineral- och gruvteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Mineral and Mine Engineering (hsv//eng)
Nyckelord
- Injection of CO2-saturated brine
- geological storage
- carbonate reservoir
- carbonate mineral reactions
- ionic trapping
- enhanced storage safety
- Tillämpad matematik och beräkningsmatematik
- Applied and Computational Mathematics
- Chemical Engineering
- Kemiteknik
- Kemi
- Chemistry
- Byggvetenskap
- Civil and Architectural Engineering
- Land and Water Resources Engineering
- Mark- och vattenteknik
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)