Figure Captions
Figure 1. Experimental set-up for steady state experiments. (1) mass
flowmeter/controller, (2) bubble column, (3) peristaltic pump, (4)
heater, (5) condenser, (6) packed column, (7) reboiler, (8) cooler, (9)
data acquisition software.
Figure 2. Influence of diamine (DMEDA) concentration upon absorption
curves and carbon dioxide loading. QG =0.2
L·min-1. () CB = 0.2 M; ()
CB = 0.6 M; () CB = 1.2 M.
Figure 3. Effect of gas flow rate upon absorption curves using DMEDA
solvent. CB = 0.6 M. () QG =0.1
L·min-1; () QG =0.2
L·min-1; () QG =0.3
L·min-1.
Figure 4. Effect of mixture ratio upon absorption curves and carbon
dioxide loading. CB=0.6 M. QG=0.2
L·min-1. [DMEA]/[MEA] ratio: () 1; () 5.
Figure 5. Comparison between absorption rate of amines blend and
individual amine solutions. QG = 0.3
L·min-1. CB = 0.6 M. () Amines blend
(50%/50%); () MEA; () DMEA.
Figure 6. Comparison of experimental behaviors (absorption rate and
carbon dioxide loading) between amines blend and diamine solvents.
QG = 0.3 L·min-1. CB =
1.2 M. () amines blend (50%/50%); () diamine.
Figure 7. 13C NMR spectra corresponding to samples
from carbon dioxide absorption in DMEDA aqueous solution.
QG = 0.3 L·min-1. CB =
0.6 M.
Figure 8. 13C NMR spectra corresponding to samples
from carbon dioxide absorption in MEA and DMEA blend solvent. MEA/DMEA
ratio = 1. QG = 0.3 L·min-1.
CB = 0.6 M.
Figure 9. 13C NMR spectra corresponding to samples
from carbon dioxide absorption in MEA and DMEA blend solvent. MEA/DMEA
ratio = 5. QG = 0.3 L·min-1.
CB = 0.6 M.
Figure 10. Influence of liquid phase and gas flow rates upon carbon
dioxide absorption rate. CB = 1.2 M. ()
QL = 96 mL·min-1; ()
QL = 72 mL·min-1; ()
QL = 45 mL·min-1.
Figure 11. Influence of gas flow rate and type of solvent upon carbon
dioxide absorption rate. QL = 72
mL·min-1. CB = 1.2 M. () diamine, ()
MEA/DMEA ratio = 1, () MEA/DMEA ratio = 5.