Investigation of the Surface Tension for Diethanolamine-CO2 Aqueous Solutions

In this work, the surface tensions of carbonated diethanolamine (DEA) aqueous solutions from 293.15 to 323.15 K were measured by using an automatic surface tension meter. A thermodynamic model applicable for the surface tensions of carbonated DEA aqueous solution was proposed and the calculated results agreed well with experiments. The influences of temperature, DEA concentration and CO2 loading were demonstrated on the basis of experiments and theoretical calculations.