Separation and Purification Technology 277 (2021) 119465
4
which describe the capacity of ILs to absorb CO
2
, experimental data at
different temperatures were used in Aspen Plus software to the calcu-
lation of both equilibrium and Henry’s constant and viscosity. For IL
[emim][Ac], which was not been previously
evaluated by COSMO-
based/Aspen Plus methodology, the experimental viscosity and solubi-
lity values at different temperatures were reported by Zareiekordshouli
et al.
[38]
and Shiflett and Yokozeki
[39]
, respectively. For the other ILs
evaluated in this work ([bmim][Ac], [bmim][GLY] and [bmim][i-but]),
the experimental data were taken from the previously published work of
Hospital-Benito et al.
[30]
.
The experimental data of the ILs viscosity at different temperatures
were fitted to the form of Andrade equation (Eq.
(1)
), and added into the
Aspen Properties for the CO
2
mass transfer kinetics estimation.
Ln
μ
=
A +
B
T
(1)
Then, taking into account that the reaction between CO
2
and each IL
studied is described as 1:2 stoichiometry (2 IL + CO
2
↔
PROD), the
experimental isotherms of these ILs were fitted to the thermodynamic
model equation (Eq.
(2)
) proposed in previous work
[30]
where z is the
absorption molar ratio (molCO
2
⋅
molIL
-1
),
K
H
is the CO
2
Henry’s constant
(bar),
P
CO
2
is the CO
2
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