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Challenges and Opportunities for Lithium Extraction from Geothermal Systems in Germany—Part 3: The Return of the Extraction Brine

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  • Valentin Goldberg

    (Chair for Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, Adenauerring 20b, 76131 Karlsruhe, Germany
    Andean Geothermal Center of Excellence (CEGA), Department of Geology, Facultad de Ciencias físicas y Matemáticas, Universidad de Chile, Santiago 8370450, Chile)

  • Ali Dashti

    (Chair for Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, Adenauerring 20b, 76131 Karlsruhe, Germany)

  • Robert Egert

    (Energy and Environment Science and Technology Directorate, Idaho National Laboratory, Idaho Falls, ID 83415, USA)

  • Binil Benny

    (Department of Civil and Environmental Engineering, Environmental Engineering, Bochum University of Applied Sciences, Am Hochschulcampus 1, 44801 Bochum, Germany)

  • Thomas Kohl

    (Chair for Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, Adenauerring 20b, 76131 Karlsruhe, Germany)

  • Fabian Nitschke

    (Chair for Geothermal Energy and Reservoir Technology, Institute of Applied Geosciences, Karlsruhe Institute of Technology, Adenauerring 20b, 76131 Karlsruhe, Germany)

Abstract

Lithium (Li) is considered a crucial element for energy transition due to its current irreplaceability in Li-ion batteries, particularly in electric vehicles. Market analysis indicates that Germany’s future automotive sector and planned battery cell production will necessitate significant quantities of global lithium production. At the same time, only 1% of the world’s Li production is currently sourced from Europe. Recently, geothermal brines in Germany have gained attention as a potential local raw material source. These brines exhibit elevated Li concentrations and substantial flow rates in geothermal plants, suggesting the possibility of viable local production. However, a comprehensive full-scale Li extraction process from geothermal brines is yet to be established, and uncertainties persist regarding its long-term behavior. To address this, a generic model based on the geothermal settings of the Upper Rhine Graben was developed, simulating a 30-year operational period for Li extraction. The simulation revealed a 40% depletion of lithium during the observation period, while heat production remained constant. Nonetheless, the model also demonstrated a mean Li production of 231 t per year (equivalent to 1230 t per year of lithium carbonate equivalent), which could significantly enhance the economic prospects of a geothermal power plant and, if applied to multiple plants, reduce Germany’s dependence on global lithium imports. The primary factor influencing productivity is the achievable flow rate, as it directly impacts access to the raw material, hence, emphasizing the importance of detailed reservoir exploration and development in optimizing future lithium production from geothermal brines.

Suggested Citation

  • Valentin Goldberg & Ali Dashti & Robert Egert & Binil Benny & Thomas Kohl & Fabian Nitschke, 2023. "Challenges and Opportunities for Lithium Extraction from Geothermal Systems in Germany—Part 3: The Return of the Extraction Brine," Energies, MDPI, vol. 16(16), pages 1-21, August.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:16:p:5899-:d:1213759
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    References listed on IDEAS

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    1. Kai Stricker & Jens C. Grimmer & Robert Egert & Judith Bremer & Maziar Gholami Korzani & Eva Schill & Thomas Kohl, 2020. "The Potential of Depleted Oil Reservoirs for High-Temperature Storage Systems," Energies, MDPI, vol. 13(24), pages 1-26, December.
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    3. William T. Stringfellow & Patrick F. Dobson, 2021. "Technology for the Recovery of Lithium from Geothermal Brines," Energies, MDPI, vol. 14(20), pages 1-72, October.
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