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Development of a brine treatment strategy for enhancing geothermal energy production and associated raw material extraction

Goldberg, Valentin; Winter, Daniel; Nitschke, Fabian; Morata, Diego; Koschikowski, Joachim; Kohl, Thomas

Abstract:
The energy transition and the associated need for non-energy, mineral raw materials have prompted the German government to expand research and development activities along the entire value chain. It is well known that the highly mineralized thermal waters that circulate during the extraction of geothermal energy have, in some cases, significant enrichments of economically strategic elements such as lithium, rubidium, antimony or magnesium. The extraction of mineral resources from thermal waters is still challenging in terms of process technology, but new sustainable methods are paving the way for economic extraction as an alternative to conventional hard rock mining. Due to the overall high salt concentrations, selective separation of scale-forming minerals in a pretreatment stage is necessary to avoid scalings or membrane fouling in the later process steps. Furthermore, in high enthalpy geothermal fields, precipitation of amorphous silica is a limiting factor for the possible amount of extractable energy.

The focus of this study is on controlling silicate precipitation, which is expected to occur due to changes in temperature and pressure during energy and raw material extraction. ... mehr


Zugehörige Institution(en) am KIT Institut für Angewandte Geowissenschaften (AGW)
Publikationstyp Vortrag
Publikationsdatum 09.07.2021
Sprache Englisch
Identifikator KITopen-ID: 1000135151
HGF-Programm 38.04.04 (POF IV, LK 01) Geoenergy
Veranstaltung Goldschmidt (2021), Online, 04.07.2021 – 09.07.2021
Projektinformation CLIENT II; BrineMine (BMBF, BMBF FONA, 033R190B)
Schlagwörter Geothermie; Rohstoffe; Lithium; Silica
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