Membrane Gas Separation

154, 156, 157
FT-IR spectra 148, 148
physical properties 149
tortuosity factor 131
trans-cis isomerization 61, 62
transition models, for ordered pore 
networks 94–95
transition state theory (TST) 91–93, 
93
transport
correlation of free volume and 
79–80
determination of mode of 101–2
transport mechanisms 88
activated diffusion 88
Knudsen diffusion 88, 89–90
surface diffusion 88, 88–89
transport properties 116
of Hyfl on
®
73–79
triethylene glycol (TEG) 320
turndown, of cryogenic systems 302
Ube Industries 291
ultrasonic time-domain refl ectometry 
322
universal force fi eld (UFF) values 
99
UV irradiation 13, 68
vacuum pump 335
van der Waals volume 51, 54, 79, 79, 80, 
130, 147
vapour activity 133
vapour/gas separation 298–300
vapour permeation measurements 73, 
76–79
vapour sorption 133–34
in mixed matrices based on AF 2400 
134–36
pressure decay apparatus for 133, 134
variable fi bre packing
effect on dry gas fl ow rate 349
effect on dry gas recovery 350
velocities, of gases/pore atoms 99
vinyl chloride 298, 299
vinyl-terminated telechelic polyimides 11
volatile organic compounds 282
water 217–22
competitive sorption into 
polydimethylsiloxane (PDMS) 219
competitive sorption into polysulfone 
and Matrimid 5218 220–22
kinetic diameter and critical 
temperature 203
permeability within polymeric 
membranes and selectivity relative 
to CO
2
218
variation in concentration in the radial 
direction along the retentate outlet 
348
water gas shift 187
water/nitrogen selectivity
dry gas fl ow rate 342, 343
dry gas recovery 342, 343
well depth 95
129
Xe-NMR spectroscopy 61
zeolites 29, 90, 91, 94, 125, 159, 284
glassy perfl uorolymer–zeolite hybrid 
membranes 113–24
ZSM-5 114

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