Geothermal

Reducing industrial CO2 emissions is a global priority, and we are exploring how to apply our technology to address this need. One common approach to reducing carbon footprint is through carbon sequestration.

How does carbon sequestration work?

  • CO2 is captured from power plants or industrial sources.
  • The CO2 is compressed and transported through pipelines to a sequestration site, typically an underground reservoir such as abandoned oil and gas fields.
  • CO2 is injected underground for permanent storage, where it is trapped below impermeable rock formations.
Geothermal plant

How does Echogen’s technology contribute?

The Geological Carbon Sequestration/Geothermal Heat Extraction (GCS/GHE) Program combines the Echogen supercritical CO2 (sCO2) turboexpansion cycle with carbon sequestration potential in natural sedimentary reservoirs found in the United States. With our partners, Lawrence Berkeley National Laboratory (LBNL) and the University of Texas at Austin, Bureau of Economic Geology (BEG), Echogen is developing a power plant/turbine system for geothermal applications. While CO2 is being pumped into an injection well for sequestration, a portion of the CO2 can be extracted through nearby wells. This geothermally heated CO2 can be expanded through Echogen’s turboexpander for power production. The expanded CO2 is then cooled and reinjected through the main well to complete the cycle.

The demonstration unit is intended to verify that the application of an open CO2 system can provide positive output power using “geothermal energy” coupled with geologic carbon sequestration. Our work supports the first-ever field trial of the proposed power plant at a selected site that is being used for carbon sequestration investigation. Echogen is taking the lead in developing this technology.

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