2. Capture principles

2.1 General principle of CCUS

The principle of the CCUS chain is illustrated in figure 3 . The CO ₂ is captured at the emission source of the emitting industrial site (thermal power plant fumes, refinery or steelworks fumes, sour gas on an oilfield...), it is compressed for transport, via a dedicated pipeline network or possibly by ship (pressurized liquid), then injected into a well feeding a geological storage site, a reservoir of sufficient permeability and size, capable of storing quantities of CO ₂ associated with several decades of injection (aquifers, depleted...