A process that injects carbon dioxide deep below ground, then circulates it to extract heat and geothermal energy, has proven viable in a feasibility study by University of Alberta researchers, reports Tech Xplore. The research moves the technology a step closer to pilot testing and to becoming part of a low-carbon economy, said Alireza Rangriz Shokri, a research associate in the U of A Faculty of Engineering who conducted the study. “This is a step forward to commercializing the technology, and if successful, it’s a potential breakthrough for sustainable energy production,” he said. Known as CO2 plume geothermal or CPG technology, the process extends beyond the concept of capturing and sequestering CO2, he added. The heat and geothermal energy extracted from the CO2 could be used to generate electricity and become a revenue stream that helps offset the costs of carbon capture and storage, Shokri noted. “We were able to show that at the end of its life cycle, CPG permanently sequesters 100% of the injected CO2 in the geological reservoir, and the CO2 is not going to escape into the air.”
https://techxplore.com/news/2021-09-geothermal-energy-captured-co2.html
