in a nutshell
There are three main components in the air, which we consider here: Oxygen, nitrogen and carbon dioxide. Of course there are more, but we simplify the presentation here.
Separation of CO2
Current capture technologies consume a lot of energy because they rely on cleaning combustion gases with chemical solvents. In our case, the molecules are separated from each other with a porous material.
We use a ultra thin material with small holes in it. The reason of this approach is the fact that the CO2 premeability of a membrane is inversely proportional to the thickness of the selective layer. Therefore, materials with the thickness of only one atom, such as single-layer graphene, represent an ultimate limit for this concept. This concept is highly relevant to post-combustion carbon capture.
Nanoporous graphene membranes for post-combustion separation are rapidly appearing as a very promising technology to overcome the energy and cost-related separation problems of solvent-based purification technology. In principle, atom-thin graphene is an ideal material for advanced separation processes.