Where Pi is the permeance of species i (mol
m−2 s−1 Pa−1);
Qi is the gas flow rate at the permeate side (mol
s−1), pf and pp are
the feed and permeate pressures (Pa); and A is the active membrane area
(m2). The H2/CO2binary mixture gas separation tests were performed using the setup shown
in Fig. 2. The gas separation experiments were conducted with an
equimolar mixture of H2/CO2 at 25 ˚C.
Permeate and retentate compositions were analyzed using gas
chromatography (GC-3800, Varian, TCD detector). The selectivity (α) of
membrane was calculated using equations 2.