Membrane Gas Separation

176
mass transport coeffi cients 171
ethylcellulose magnetic membranes 166
drift coeffi cients 174
ethylcellulose membranes 165
air enrichment data 172
diffusion coeffi cients for ideal and 
non-ideal Fickian systems 173
diffusion coeffi cients for nitrogen and 
oxygen in air 177
diffusion coeffi cients for pure gases 
176
fl ux vs. membrane side for 178
mass transport coeffi cients 171
ethylene off-gas 306
ethylene oxide 256, 257, 300
ethylene production 307

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Index
359
explicit sweet distributions simulations 
341
facilitated transport membrane 257
FCC off-gas 306
6FDA 10, 11, 145, 145
6FDA-6FpDA/DABA, gas permeability 
coeffi cients and selectivity 14
6FDA-based polyimide–silica hybrid 
membranes, ideal CO
2
/CH
4
selectivity plotted against CO
2
permeability coeffi cient 144, 
144
6FDA-DABA, gas permeability 
coeffi cients and selectivity 14
6FDA-mPD/DABA, gas permeability 
coeffi cients and selectivity 14
6FDA-mPD, gas permeability coeffi cients 
and selectivity 14
6FDA-TAPA
gas permeability coeffi cients and 
selectivity 20
with terephthaldehyde (TPA) 17
6FDA-TAPOB 143, 155, 156
diffusion coeffi cients and diffusivity 
selectivity 153
gas permeability coeffi cients and 
selectivity 20
permeability coeffi cients and ideal 
selectivity 152
physical properties 149
solubility coeffi cients and solubility 
selectivity 154
6FDA-TAPOB–silica hybrid membranes
CO
2
permeability, diffusion and 
solubility coeffi cients of 155
FT-IR spectra 147, 148
glass transition temperature and 
weight-loss temperature plotted 
against silica content 150, 150
6FDA-TeMPD 8
gas permeability coeffi cients and 
selectivity 15, 16
6FDA-TeMPD-BEI, effects of UV 
irradiation on 17, 21
6FDA-TMPD/DABA 8, 13
6FDA-TMPD, gas permeability 
coeffi cients and selectivity 18
6FDA-TMPDA 222
time dependent effect on addition of 
hexane on the permeability of CO
2
in 224
FFV see fractional free volume
fi bre inner diameter
effect on dry gas fl ow rate 345
effect on dry gas recovery 346
effect of sweep and variation of 
344–46
fi bre packing variations 347–49, 350
fi bre properties and operating conditions 
341
Fick’s equation 163
Fick’s law 161
fl at sheet membranes 314
Flory–Huggins equation 229
Flory–Huggins regular solution theory 
204
4,4
′
-(9-fl uorenylidene) dianiline (FDA) 
11
fl uorinated polymers 59
fl ux 86, 324
fractional free volume (FFV) 79, 126, 
131, 147
free volume 29, 50–55, 60, 71–72, 126
analysis 68–71
analysis of Hyfl on AD80X 72, 73
correlation of transport and 79–80
defi nition 60
determination of size 53
element sizes 54–55, 55
estimation of 51
measurement of 61
probing methods 60–61
free volume distribution 69–71
freeze drying 314
gas adsorption 31–33
gas concentration 89
gas dehydration module performance, 
effect of sweep uniformity on 
333–53
gas diffusivity 130–32

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360
Index
gas mixtures, separation of 160
gas molecules, interactions between pore 
wall and 95
gas permeation 33–35
through non-porous polymeric 
membranes 203
gas separation 159
applications 300–309
compaction in 322–23
with a constant concentration gradient 
across membrane 86, 86
current applications of membranes in 
287, 288–89
within cylindrical shaped pores 97, 97
glassy perfl uorolymer–zeolite hybrid 
membranes for 113–24
materials and membranes employed in 
282–85
membrane applications in 286–300
modelling in porous membranes 
85–109
predictions 102–5
gas solubility coeffi cients 116
gas solubility, modelling into mixed 
matrix glassy membranes 128–30
gas sorption measurements 260
gases
critical temperature 203
kinetic diameter 203
solubility within rubbery polymeric 
membranes 205
gasoline vapour recovery 299–300
Gaussian distribution of sweep 336–38
glassy membranes
gas concentration 208
sorption theory 207–10
glassy perfl uorolymer–zeolite hybrid 
membranes 113–24
glassy polymers
determination of size of free volume 
elements in 53
diffusive jump 93
gas permeation properties 33
plasticization of 209
pores 91, 92
global warming 227, 255
global warming potential 185
glycerol 314
glycol dehydrators 320
greenhouse gas emissions 186
greenhouse gases 185, 255
Grissik processing plant 228
[H
2
NC
3
H
6
mim][Tf
2
N], membrane 
performance of 192
Hansen’s Parameters 319, 319
HBPI--silica hybrid membranes see 
hyperbranched polyimidesilica 
hybrid membranes
Henry’s law 87, 89
hexane
critical temperature 203
effect on addition to a mixture of 
methane and carbon dioxide