HPV	Hydrophilic pervaporation
hydr	hydrophilic
MFLI	Membrane Flash Index	$\left[-\right]$
NPA	n-propanol
OF	Objective function
PSI	Pervaporation Separation Index	$\left[\mathrm{k}\mathrm{g}/\left({\mathrm{m}}^2\mathrm{h}\right)\right]$
PVA	Polyvinyl alcohol
PV	Pervaporation
VLE	Vapour-Liquid Equilibrium
Greek letters
$\alpha$	Separation factor
$\beta$	Selectivity
${\overline{\gamma }}_i$	$\mathrm{Average}\mathrm{activity}\mathrm{coefficient}\mathrm{of}\mathrm{component}i$
${\gamma }_{i1}$	$\mathrm{Activity}\mathrm{coefficient}\mathrm{of}\mathrm{component}i$ in the feed
δ	Membrane thickness	$\left[{\displaystyle \mathrm{\mu }}\mathrm{m}\right]$