Studies On Absorption Properties And Mechanism Of CO₂in The System1,2-diaminoethane+Triethylene Glycol

In recent years, as a result of the concentration of atmospheric carbon dioxide (CO2) hassubstantially increased, it has seriously affected on the human living environment andecological balance. CO2has become the most concerned of the greenhouse gases. InnerMongolia has rich coal resources. With the development of coal industry, emission of CO2has increased, which becomes a serious atmospheric problem. Therefore, it is an exigentnecessity to develop the CO2abatement techniques.In this work, it introduces some of the CO2abatement techniques in the world. Thesystem1,2-Diaminoethane+triethylene glycol is seen as a kind of ideal organic solventfor decarburization processes. Gas liquid equilibrium data (GLE) for EDA+TEG+water+CO2at all experimental temperatures and pressures were determined with a specificdevice. The results indicate that the absorption to CO2is increased.Densities and viscosities for the binary mixtures EDA+TEG at T=(298.15,303.15,308.13and313.15) K were measured. From the experimental data, the excess molarvolumesVEm, and viscosity deviations were calculated, and the values ofVEm arenegative in the whole composition range. From the kinematic viscosity data, Gibbsenergies of activation of viscous flow (ΔG*), enthalpy of activation for viscous flow (ΔH*),and entropy of activation for the viscous flow (ΔS*) were also calculated.The interaction mechanism of CO2with the system EDA+TEG was studied by meansof modern FTIR spectroscopic technologies. The results show that interaction was formedbetween EDAmolecules and TEG molecules. In addition, the reaction of EDA+TEG withCO2generates ammonium salt.