Development of a continuous silica treatment strategy for metal extraction processes in operating geothermal plants

Goldberg, Valentin; Winter, Daniel; Nitschke, Fabian; Groß, F; Pfeiffle, Daniel; Uhde, Jörg; Morata, Diego; Koschikowski, Joachim; Köhl, Thomas

doi:10.1016/j.desal.2023.116775

Cited by 3 publications

(5 citation statements)

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“…By analyzing the concentrations of dissolved solids, noncondensable gases, and pH of the fluids, the likelihood of mineral precipitation (scaling) and corrosion can be evaluated. This information is crucial for designing and maintaining geothermal infrastructure and ensuring the long-term sustainability of geothermal operations [9][10][11]. Geothermal potential, when combined with geochemical, geological, and geophysical analysis, can provide a comprehensive understanding of the geothermal system [12].…”

Section: Introductionmentioning

confidence: 99%

Ensuring Accuracy: Critical Validation Techniques in Geochemical Analysis for Sustainable Geothermal Energy Development

Idroes,

Suhendrayatna,

Khairan

et al. 2024

Leuser J. Environ. Stud.

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Geochemical analysis is a critical tool in geothermal exploration, providing valuable insights into reservoir characteristics. However, obtaining accurate and reliable geochemical data requires rigorous validation techniques. This review examines key factors affecting the accuracy of geochemical data and discusses best practices for ensuring quality. Proper sampling methods, including selection of representative locations, use of appropriate equipment, and adherence to robust protocols for sample collection, filtration, preservation, and storage, are essential for maintaining integrity. Analytical techniques must be carefully selected, with regular calibration and standardization of instruments using certified reference materials. Implementing comprehensive quality assurance and quality control procedures, such as analyzing blanks, duplicates, and spike samples, helps monitor precision and accuracy. Data interpretation should consider the complexities of the geological and hydrological settings, integrating multiple lines of evidence. By following established guidelines and continuously updating methods based on emerging technologies and inter-laboratory comparisons, geothermal teams can optimize the reliability of their geochemical data. Accurate and precise geochemical information, when combined with geological, geophysical, and hydrological data, enables informed decision-making and enhances the success of geothermal projects. As geothermal energy gains importance in the transition to sustainable resources, ensuring the accuracy of geochemical analysis will be crucial for effective exploration and development.

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Section: Introductionmentioning

confidence: 99%

Ensuring Accuracy: Critical Validation Techniques in Geochemical Analysis for Sustainable Geothermal Energy Development

Idroes,

Suhendrayatna,

Khairan

et al. 2024

Leuser J. Environ. Stud.

View full text Add to dashboard Cite

show abstract

“…Previous studies have investigated the technical feasibility of this approach, highlighting its potential for reducing the environmental impact of geothermal mining practices [16,17]. However, challenges such as silica scaling necessitate specific water treatments to make this scientific approach practically viable [21]. Recent research has Copper and nickel do not meet the CRM thresholds, but are on the CRM list as Strategic Raw Materials (based on [9]).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have investigated the technical feasibility of this approach, highlighting its potential for reducing the environmental impact of geothermal mining practices [16,17]. However, challenges such as silica scaling necessitate specific water treatments to make this scientific approach practically viable [21]. Recent research has demonstrated that effective silica removal from geothermal fluids can be achieved through a chemical process that forms Calcium-Silicate-Hydrate (C-S-H) phases, significantly reducing the risk of silica scaling [21].…”

Section: Introductionmentioning

confidence: 99%

“…However, challenges such as silica scaling necessitate specific water treatments to make this scientific approach practically viable [21]. Recent research has demonstrated that effective silica removal from geothermal fluids can be achieved through a chemical process that forms Calcium-Silicate-Hydrate (C-S-H) phases, significantly reducing the risk of silica scaling [21].…”

Section: Introductionmentioning

confidence: 99%

“…Energies 2023, 16, x FOR PEER REVIEW 3 of 29 demonstrated that effective silica removal from geothermal fluids can be achieved through a chemical process that forms Calcium-Silicate-Hydrate (C-S-H) phases, significantly reducing the risk of silica scaling [21].…”

Section: Introductionmentioning

confidence: 99%

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Geothermal Energy and Its Potential for Critical Metal Extraction—A Review

Szanyi,

Rybach,

Abdulhaq

2023

Energies

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In an era of accelerating energy transition and growing demand for critical metals essential for clean technologies, the innovative integration of geothermal energy with critical metal extraction stands as a paradigm shift in sustainable resource utilization. This comprehensive review unravels the synergistic potential of coupling geothermal energy systems with critical metal extraction, thereby transforming a dual crisis of energy and resource scarcity into an opportunity for circular economy. Through rigorous analysis of existing geothermal technologies, and extraction methodologies, the study establishes a coherent framework that merges energy production with environmental stewardship. It scrutinizes current extraction techniques, and evaluates their compatibility with geothermal brine characteristics, proposing optimized pathways for maximum yield. Through detailed case studies and empirical data, the paper elucidates the economic and environmental advantages of this multifaceted approach, from reduced carbon footprint to enhanced energy efficiency and resource recovery. It concludes that combined heat and mineral production technology can open new, unexplored resources, increasing the supply of previously untapped resources, while the potential of geothermal energy for sustainable mineral extraction and energy production is in line with Sustainable Development Goal 7, which aims to ensure access to affordable, reliable, sustainable and modern energy for all.

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

Goldberg,

Dashti,

Egert

et al. 2023

Energies

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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.

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Development of a continuous silica treatment strategy for metal extraction processes in operating geothermal plants

Cited by 3 publications

References 50 publications

Ensuring Accuracy: Critical Validation Techniques in Geochemical Analysis for Sustainable Geothermal Energy Development

Ensuring Accuracy: Critical Validation Techniques in Geochemical Analysis for Sustainable Geothermal Energy Development

Geothermal Energy and Its Potential for Critical Metal Extraction—A Review

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

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