Page 300 - Petroleum and Gas Field Processing
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Figure 19 Hollow-fiber separator assembly.
Table 5 Permeabilities of Various Gases in Membranes
3
cm ðSTPÞ cm
Permeability (PM) 10 10
2
s cm =cmHg
Temp.
Material ( C) He H 2 CH 4 CO 2 O 2 N 2
Silicone rubber 25 300 550 800 2700 500 250
Natural rubber 25 31 49 30 131 24 8.1
Polycarbonate 25–30 15 12 — 5.6, 10 1.4 —
(Lexane)
Nylon 66 25 1.0 — — 0.17 0.034 0.008
Polyester (Permasep) — — 1.65 0.035 0.31 — 0.031
Silicone–polycarbonate 25 — 210 — 970 160 70
copolymer (57%
silicone)
Teflon FEP 30 62 — 1.4 — — 2.5
Ethyl cellulose 30 35.7 49.2 7.47 47.5 11.2 3.29
Polystyrene 30 40.8 56.0 2.72 23.3 7.47 2.55
Source: Reference [4]. STP, standard temperature and pressure.
Copyright 2003 by Marcel Dekker, Inc. All Rights Reserved.
