Solubility of Carbon Dioxide in Aqueous Mixture of Aminoethylethanolamine + Sulfolane at High Pressure and Different Temperatures
Volume Title: 1
1Department of Chemical engineering, Faculty of Chemical Engineering, Tarbiat Modares University
2Masters student, Department of Chemical Engineering, Tarbiat Modares University,Tehran, Iran
In recent years, the emission of greenhouse gases especially carbon dioxide has been increased. Since CO2 is accounted for as a gas pollutant and leads to global warming, the removal of carbon dioxide is an important step in a gas capturing process. In this study, the solubility of carbon dioxide in mixtures of the chemical and physical solvents at different compositions is measured using a static high-pressure equilibrium cell. The measurements are carried out for the two different blends of sulfolane + Aminoethylethanolamine(AEEA) + water with the mass compositions of (20-20-60) wt.%, and (10-20-70) wt.% , respectivly, at 313.15 and 328.15 K within the total pressure range of 100 – 5300 kPa. The results show that for both systems at the given composition, by increasing temperature the loading of CO2 was reduced at a fixed partial pressure of CO2. In addition by increasing the partial pressure of CO2 at a fixed temperature, the CO2 absorption was enhanced. Moreover, the present findings showed that CO2 solubility was enhanced by increasing either sulfolane or AEEA concentration. However, at low acid gas loading, the CO2 loading was reduced by enhancing the sulfolane concentration.