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Communication Dans Un Congrès Année : 2023

Review of concepts that combine geothermal energy and CCS: comparing performance and sustainability

Résumé

Geothermal energy production and CCS (carbon capture and storage) represent promising technological solutions to help mitigate climate change and aid the current global energy crisis. In recent years, the number of concepts that propose to combine and mutualize these technologies has exploded. An extensive literature review was carried out of the concepts (over 150 pertinent publications). Here we present a synthesis of that work based on infographics for each concept. Concepts were classified (figure 1) and fall into the following categories: 1) where supercritical CO2 is used as a heat vector for geothermal energy production; 2) water-driven geothermal concepts with CO2 injection/reinjection, generally dissolved in the geothermal brine (either an external source for CCS or reinjection of CO2 emitted by geothermal brine exploitation for near-zero emissions); 3) other synergetic uses with only slight hybridization. Another possibility to classify concepts is to separate the concepts that are intrinsically linked to specific geological features, and another pool of concepts that require similar geological features (porous and permeable aquifer overlain by a caprock). To compare the concepts, key performance indicators were proposed with semi-quantitative ranking. A visual comparison aid was developed in the form of a series of eight infographics, including all the concepts and based on key criteria, such as amount of CO2 stored and/or energy produced (heat or electricity), features of the underground and of the external CO2 emitters, readiness of the concept, etc.

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Dates et versions

hal-04309951 , version 1 (27-11-2023)

Identifiants

  • HAL Id : hal-04309951 , version 1

Citer

Annick Loschetter, Christophe Kervévan, Rowena Stead, Thomas Le Guénan, Chrystel Dezayes, et al.. Review of concepts that combine geothermal energy and CCS: comparing performance and sustainability. EGW 2023 European Geothermal Workshop, Nov 2023, Utrecht (Netherlands), Netherlands. ⟨hal-04309951⟩

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