Membrane Gas Separation

223
time dependent effect on addition on 
the permeability of CO
2
in 
6FDA-TMPDA 224
HFCs 185, 186
hollow-fi bre modules 284, 285, 285, 
333
co-current fl ow 333
counter-current fl ow 333–34
cross-fl ow 333
development at Cynara 285, 286
homo-poly(ethylene oxide) (PEO) 256
Horvath–Kawazoe equation 32
HQDPA-TFAPOB, gas permeability 
coeffi cients and selectivity of 20
hybrid membranes 113
hydraulic permeability, effect on module 
performance 349
hydrocarbons 222–24
hydrofl uorocarbons (HFCs) 185, 186
hydrogen
kinetic diameter and critical 
temperature 203
from off-gas from catalytic reforming 
305
product purity 305
hydrogen chloride gas, kinetic diameter 
and critical temperature 203

---

Index
361
hydrogen recovery 287–90
from ammonia purge streams 287–88, 
290
in refi neries 287, 290
from refi nery off-gas 308, 308
syngas ratio adjustment 287, 289–90
hydrogen separation 283
operating fl exibility 301–2
in refi neries 301–9
reliability 302–3
turndown 302
hydrogen sulfi de (H
2
S) 197, 212–16
competitive sorption into polysulfone 
and Matrimid 5218 213–16
kinetic diameter and critical 
temperature 203
permeability within polymeric 
membranes and selectivity relative 
to CO
2
212, 212
hydroprocessor purge gases 306
Hyfl on
®
AD 59–83
free volume analysis 68–71
membrane preparation procedure 
64–68
membrane properties 67–68
molecular dynamics simulations 
71–72
photochromic probe method 61–64
transport properties 73–79
Hyfl on
®
AD60X 60, 64, 114
absorption spectrum before and after 
isomerization 69, 69
FVE distribution curve 70
FVE size distribution 80
properties 115
and silicalite-1 121, 121
size of free volume elements 71
Hyfl on
®
AD80X 60, 64
free volume analysis 72, 73
FVE distribution curve 70
FVE size distribution 80
methanol vapour permeation curve 78
permeation curves of dichloromethane 
and methanol vapour in membranes 
of 75
size of free volume elements 71
transport properties of dichloromethane 
and methanol vapour in 76
hyperbranched polyimide–silica hybrid 
membranes
coeffi cients of thermal expansion 
150–51
diffusion coeffi cients and diffusivity 
selectivity 153
formation 145–46, 146
gas transport properties 151, 157
ideal CO
2
/CH
4
selectivity plotted 
against CO
2
permeability coeffi cient 
156
ideal O
2
/N
2 
selectivity plotted against 
O
2
permeability coeffi cient 155
measurements 146–47
O
2
/N
2
and CO
2
/CH
4
selectivities of 
151–56
permeability coeffi cients and ideal 
selectivity 152
physical properties 149, 157
solubility coeffi cients and solubility 
selectivity 154
thermal properties 150
thermal stabilities 157
hyperbranched polyimides
characterization 143
density of 147
effects of UV irradiation on selectivity 
and permeability 21, 22
features of 5–6
gas permeability coeffi cients and 
selectivity of 20
gas permeation properties 17–21
synthesis of 9–13, 143
hyperbranched polymers 6, 7
properties 4
synthesis of 4
ideal gas selectivity 151, 260
ideal separation factor 87
ideal sweep distribution, module 
performance with 341–44
industrial processes, composition of minor 
components in 202
infi nite dilution diffusion coeffi cient 138

---