Abstract
The kinetics of absorption of carbon dioxide (CO2) into aqueous solutions of N-methyldiethanolamine (MDEA) in the presence of different activators is investigated experimentally. The activators considered are piperazine (PZ), diisopropylamine (DIPA), 2-amino-2-methyl-1-propanol (AMP), diglycolamine (DGA) and aminoethylethanolamine (AEEA). The temperature and the initial pressure in all the experiments were 23.1–27.7°C and 10atm, respectively. The molar concentration of all the solutions has been set equal to 3.36mol/L. The molar ratio of the activator to MDEA in the solutions was set to 0.125, 0.20 and 0.25. The results show that the fastest absorption rate was achieved for the aqueous solution of AEEA+MDEA with molar ratio of activator to MDEA equals to 0.125.
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