2.1. Materials
Carbon dioxide was supplied by Praxair with a purity of 99.998%. The
chemical solvents employed in carbon dioxide chemical absorption
experiments were based on the use of N,N-dimethylethylenediamine
(DMEDA), monoethanolamine (MEA) and dimethylethanolamine (DMEA) that
were purchased from Alfa Aesar with purities of 95%, ≥99% and ≥98%
respectively. Aqueous solutions of these amines were prepared on mass
with double distilled water.