Table 3. CO₂ Absorption Rate Constants for Fresh and Regenerated Solutions.

amine-based solutions	fresh solution	cycle 1	cycle 2	cycle 3
30% MEA	0.11285	0.11034	0.1098	0.10623
30% MEA-0.2 mg/mL GO	0.16854	0.16626	0.16395	0.16349
30% EDA	0.13119	0.12744	0.10937	0.10361
30% EDA-0.2 mg/mL GO	0.17603	0.16345	0.15459	0.14776