$C$	molar concentration, mol CO2·mL−1
$D$	diffusion coefficient, m2·s−1
$d_{cont}$	diameter of the contactor, m
$d_h$	hydraulic diameter of the shell side, m
$d_i$	inside diameter of the fiber, m
$d_o$	outside diameter of the fiber, m
$E$	enhancement factor
$Ea$	activation energy, KJ·mol−1
$H$	Henry’s constant, MPa
$∆H_R$	enthalpy, KJ·mol−1
$k_o$	first order reaction rate constant, s−1
$K_{eq}$	equilibrium constant
$k$	mass transfer coefficient, m·s−1
$m$	distribution coefficient between the liquid and gas
$M$	molecular weight, g·mol−1
$N$	desorption molar flux, mol·m−2·h−1
$P$	pressure, bar
$P_V$	vacuum pressure applied in MVR process, bar
$Q$	volumetric flow rate, mL min−1
$R$	MVR efficiency, %
$R_i$	inner radius of membrane fiber, m
$r$	radial coordinate
$r_{C{O}_2}$	CO2 reaction rate, mol·m−3·s−1
$T$	temperature, K
$V$	volume, mL
$V_z$	velocity, m·s−1
$V_{zm}$	liquid mean velocity, m·s−1
$V_{C{O}_2}$	molar volume of CO2, cm3·mol−1
$z$	axial coordinate
$Re$	Reynolds number
$Sc$	Schmidt number
$Sh$	Sherwood number
Subscripts
$C{O}_2$	carbon dioxide
$C$	cyclic
$ex$	external
$0$	initial
$g$	gas
$IL$	ionic liquid
in	inlet
$l$	liquid
$m$	membrane
$N$	net
$out$	outlet
$v$	vacuum
Greek Letters
$\alpha$	CO2 loading, mol_CO2·mol_IL−1
$\mu$	viscosity, cP
$\rho$	density, Kg·m−3
$\upsilon$	molar volume of CO2, cm3·mol−1