Membranes - Introduction to Carbon Capture and Sequestration - page 297

10% CO 2
90% N 2
5 atm

Permeate

1 atm

Figure 7.3.1 Single-stage membrane for carbon capture

Table 7.3.1 Typical conditions for a membrane separation of fl ue gas

p F 5 atm

p p 1 atm

500 m 3 /s Φ F

x CO 2 , F 0.1

P ′ CO 2 1,000 gpu

p F — pressure of the flue gas, p P — pressure of the permeate, P

′ CO 2 — permeance of the mem-
brane where gpu = (10 − 6 cm 3 (STP)/cm 2 sec cm-Hg), x CO 2 , F — flue gas composition, and Φ F —
emissions of flue gas.

membrane independently. For example, we can increase the selectivity
of our membrane by decreasing the N 2 permeability of our membrane
while keeping the permeability of CO 2 fi xed.
As we saw in the previous section, the values in Table 7.3.1 together
with the selectivity fully specify our membrane and we can use the