Mw	Molecular weight
A	Effective membrane area (m2)
DS	Degree of swelling (%)
Do	Pre-exponential factor for diffusion
ED	Activation energy for diffusion (kJ/mol)
EDw	Activation energy for diffusion of water (kJ/mol)
EDET	Activation energy for diffusion of bioethanol (kJ/mol)
Ep	Activation energy for permeation (kJ/mol)
Epw	Activation energy for permeation of water (kJ/mol)
EpET	Activation energy for permeation of bioethanol (kJ/mol)
Ex	Activation energy for permeation or diffusion (kJ/mol)
ET	Bioethanol
ΔHs	Heat of sorption (kJ/mol)
J	Total flux (kg/m2h)
Jo	Pre-exponential factor for permeation
PSI	Pervaporation separation index
P and F	Mass percent of permeate and feed
R	Gas constant
t	Permeation time (h)
T	Temperature (K)
W	Mass of permeate (kg)
Ws and Wd	Mass of the swollen and dry membranes
Greek letters
δ	Membrane thickness (50 μm)
αsep	Separation factor