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Title: Low-Temperature Enhanced Geothermal System using Carbon Dioxide as the Heat-Transfer Fluid

This report describes work toward a supercritical CO2-based EGS system at the St. Johns Dome in Eastern Arizona, including a comprehensive literature search on CO2-based geothermal technologies, background seismic study, geological information, and a study of the possible use of metal oxide heat carriers to enhance the heat capacity of sCO2. It also includes cost estimates for the project, and the reasons why the project would probably not be cost effective at the proposed location.
  1. GreenFire Energy, Emeryville, CA (United States)
Publication Date:
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Research Org:
GreenFire Energy, Emeryville, CA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Geothermal Technologies Office (EE-4G)
Contributing Orgs:
GreenFire Energy LLC, Emeryville, CA (United States)
Country of Publication:
United States
15 GEOTHERMAL ENERGY CO2, Carbon Dioxide, geothermal, Arizona