Materials and process qualification for CCUS - Storage of CO2

Storing CO2 underground is a climate technology that involves capturing CO2 from flue gases and storing it permanently in porous geological formations such as sandstone or limestone.

The purpose of this technology is to reduce greenhouse gas emissions into the atmosphere and help limit global warming.

In Denmark, we have great potential for underground CO2 storage, as there are many suitable reservoirs with a sealing layer of claystone on top. It is estimated that the Danish subsurface can contain up to 22 billion tonnes of CO2, corresponding to approximately 900 years of emissions from Denmark.

However, underground storage of CO2 requires a number of prerequisites, such as separation of CO2 from the flue gas or fuel, transport of CO2 to the storage site, permission for exploration and storage, environmental and safety assessment of the storage location, monitoring of the storage facility’s operation, and closure of the storage facility after the end of operations.

Within CO2 storage, the Danish Technological Institute can assist with the following services:

• Investigating the impact of impurities on the storage capacity of CO2
• Absorption and diffusion of CO2 in minerals
• Characterization of minerals from the subsurface, including porosity, mineral phases, and stability
• Qualification of plastic and rubber materials for, for example, seals and transport pipes, including assessment of the service life of the materials
• Qualification of metals for, for example, gas pipelines and valves, including testing of the materials’ corrosion resistance to CO2

Further information
Supercritical CO2