The potential of coupled carbon storage and geothermal extraction in a CO2-enhanced geothermal system: a review
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Abstract The increasing demand for energy makes it difficult to replace fossil fuels with low-carbon energy sources in the short term, and the large amount of CO2 emitted by fossil fuel combustion increases global warming. Carbon capture and storage (CCS) technologies for reducing CO2 emissions in power plants and industrial processes have been developed. High costs and security issues limit industrial applications of these technologies, so an alternative for carbon reduction is needed, i.e., CO2 as a working fluid for coupled carbon storage and geothermal extraction in an Enhanced Geothermal System (EGS). We describe the status of global carbon emissions, CCS technologies, and their challenges. The characteristics of CO2 as a working fluid are compared from thermophysical and thermodynamic perspectives, and the solubility of CO2 in reservoir fluids with different ionic strengths, pressures, and temperatures is analyzed. The influence of artificial stimulation on the permeability of an EGS reservoir is described. Through heat extraction experiment of water alternating supercritical CO2 (SCCO2) cycle injection, the effects of CO2–fluid–rock interactions on the reservoir’s structure and of mineral dissolution and precipitation on geological CO2 storage are analyzed. We summarize the application prospects for this alternative and the challenges of future application.
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Geothermal energy is non-carbon-based heat energy contained in the interior of the Earth, with advantages of stability, continuity, and high capacity.
“Geothermal energy is non-carbon-based heat energy contained in the interior of the Earth, with the advantages of stability, continuity, and high capacity.85”
From Technologies and perspectives for achieving carbon neutrality (2021) · cites this paper as [85]
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References 114 · Cited by 137
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- Authors
- Wu, Y., & Li, P.
- Affiliations
- China University of Mining and Technology (CN)
- Corresponding author
- Li, Pan
- Venue
- Geothermal Energy
- Published
- 2020-06-15
- Volume
- 8
- Issue
- 1
- ISSN
- 2195-9706 (ISSN-L)
- OpenAlex
- W3035737375
- Cited by
- 137
- References
- 114
- Citations by year
- 2026: 15 · 2025: 41 · 2024: 27 · 2023: 26 · 2022: 15 · 2021: 11 · 2020: 2
- FWCI
- 4.85
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Locations
- Geothermal Energy (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Natural Science Foundation of China (51674247)
- the ICET (International Clean Energy Talent) Program from China Scholarship Council
- Topics
- Physical Sciences › Environmental Science › Environmental Engineering › CO2 Sequestration and Geologic Interactions
- Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Geothermal Energy Systems and Applications
- Physical Sciences › Engineering › Mechanical Engineering › Thermodynamic and Exergetic Analyses of Power and Cooling Systems
- Keywords
- carbon storage, carbon capture and storage, mineral dissolution and precipitation, CO2 geological storage, CO2 emission reduction
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