The Kinetic Study of Carbon Dioxide Gas Absorption in Aqueous Mixture of Methyldiethanolamine and 2- ((aminoethyl) amino ethanol

In this paper, the  kinetics of carbon dioxide gas absorption by an aqueous mixture of methyldiethanolamine (MDEA) 2-((aminoethyl)amino)ethanol (AEEA) in a wetted wall column were studied experimentally. In experiments, carbon dioxide was absorbed by a mixture of 2-((aminoethyl)amino)ethanol to methyldiethanolamine with a mole ratio of 0.1 at a total concentration of 3.36 molar. The experiments were carried out at a temperature range of 313.15 to 343.15 K at three pressures of 100, 400, and 700 kPa respectively. According to the data obtained from the experiments, the mechanism of carbon dioxide gas absorption in the above mixture was considered as first order reaction to the concentration of carbon dioxide gas. Finally, the absorption rate constant was calculated in the studied mixture. The experimental results showed that at 313.15 K and 100 kPa, the addition of 0.3 molar 2-((aminoethyl)amino)ethanol to methyldiethanolamine increased the amount of mass transfer flux up to 85% in comparison with that of the same aqueous solution of MDEA.