Environmental Engineering Reference
In-Depth Information
Box 7.5.1 ( Continued )
(a) illustrates the method developed by Blinova and Svec [7.15], which uses a poly-
aniline (PANI) as the base material. The fi rst step is to photograft glycidyl meth-
acrylate and 2-hydroxyethyl methacrylate, and a subsequent step is to react these
fi lms with different types of diamines. (b) shows that because of this facilitated
transport, these materials have a performance that is better than the Robeson
upper limit.
(b)
10,000
Present Upper
Bound
1,000
Prior Upper
Bound
TR polymers
100
10
1
0.0001 0.01 1 100 10,000
P(CO 2 ) Barrers
(b) Robeson's plot for separation of CO 2 /CH 4 using membranes. Experimental points
within the circle represent permeability and separation factors determined for polyaniline
membranes photografted with glycidyl methacrylate and 2-hydroxyethyl methacrylate
reacted with ethylene-diamine (diamond), cystamine (triangle), hexamethylenediamine
(square). Figure reproduced with permission from Elsevier [7.15].
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