Fossil power production and power-intensive industry are associated with substantial CO2 emissions. Capture of CO2 and storage in geological formations has emerged as an important potential measure to reduce global greenhouse gas emissions.
There are three main concepts that are most relevant for large-scale CO2 capture. They are distinguished according to where CO2 is captured in the process:
- Capture after combustion
- Capture before combustion
- Capture during combustion with pure oxygen
There is a significant technical potential for storing CO2 in geological formations around the world. Both oil and gas fields in production as well as old oil and gas fields and other formations may be candidates for such storage.