Adsorption - Introduction to Carbon Capture and Sequestration - page 259

Figure 6.4.5 Examples of ZIF structures with a minimal parasitic energy
The atoms are shown as ball and stick models (Zn — blue-grey, N — blue, H — white, and
C — grey). The surface gives the local free energies, where cooler colors indicate the domi-
nant CO 2 adsorption sites. Figures reproduced with permission from Lin et al. [6.4].
in adsorption and desorption. As we mentioned in Section 6.3, diffusion
causes a decrease of the breakthrough times and therefore a less effi -
cient use of the bed. It is reasonable to assume that all these effects will
result in an increase in parasitic energy. Hence, from a screening point of
view, this implies that only for those materials that have a parasitic
energy well below the current MEA technology in our simple CO 2 /N 2
equilibrium model would it be worth the effort to conduct additional stud-
ies of these effects.