Researchers Test Storing Carbon Dioxide in Rocks While Extracting Hydrogen

Several research groups are testing processes that inject carbon dioxide into certain rock formations while extracting hydrogen gas from the same sites. The method aims to combine long-term carbon storage with hydrogen production. The technique relies on chemical reactions between injected carbon dioxide and minerals in the rock that release hydrogen.

Some formations may also produce heat that can be used for geothermal power generation.

Multiple teams are conducting laboratory and field experiments to measure reaction rates and hydrogen yields under different geological conditions. The work focuses on identifying rock types and depths that support both carbon retention and gas extraction. Researchers are also evaluating equipment requirements and monitoring methods needed to track gas movement and storage security over time.

If scaled, the combined process could supply hydrogen for industrial or energy uses while keeping captured carbon dioxide underground. Project teams continue to collect data on efficiency and site suitability before larger demonstrations.