Absorption of carbon dioxide into aqueous solutions of ethylenediamine: Effect of interfacial turbulence

Abstract

Absorption rates for carbon dioxide into aqueous ethylenediamine solutions were measured in a laminar liquid jet, a wetted-wall column and a quiescent liquid absorber to investigate the chemical absorption mechanism and the reaction kinetics over a wide range of contact times. From the chemical absorption data in the laminar liquid jet with surface-active agent, the value of the rate constant for the second order reaction was derived as 1.75 × 10 4 l mol −1 s −1. Additional experiments were carried out on the tracer desorption of ethylene from aqueous ethylenediamine solutions saturated with ethylene to check and verify effects due to interfacial turbulence. We conclude that the Marangoni effect cannot be neglected even for such a short contact time as that in a laminar liquid jet.