Investigation of CO۲ Solubility in Blends of AMP and HMDA Solvents: Thermodynamic Modeling Based on the Deshmukh-Mather Model

Among the various methods for CO۲ removal from the atmosphere, CO۲ absorption is considered as the most applicable one. Although several studies have been performed on CO۲ absorption by using chemical solvents, there are not many studies on using improved absorbents. Therefore, the aim of this study was to measure the solubility of CO۲ in utilized aqueous blends of ۲-amino-۲-methyl-۱-propanol (AMP) and hexamethylenediamine (HMDA). In the present research, the equilibrium set up for measuring CO۲ solubility in aqueous solvents was assembled. CO۲ solubility experiments were carried out over a various range of CO۲ partial pressures (۸.۴۴, ۲۵.۳۳, and ۴۲.۲۲ kPa) temperatures (۳۰۳, ۳۱۳, and ۳۲۳ K) and solvent concentration (۰.۴, ۱.۸, ۲, and ۳ M). The results showed that increasing CO۲ partial pressure or decreasing the temperature would lead to an increase in CO۲ loading. Furthermore, with increasing HMDA concentration, CO۲ loading reached a maximum value before it followed a slight decrease. The experimental results were fitted to the thermodynamic Deshmukh Mather model and the required parameters in this model were generated. The results showed that there is a good agreement between theoretical and experimental results of CO۲ loading.

کلیدواژه ها:

Carbon dioxide ، AMP ، HMDA ، Deshmukh Mather Model ، Correlation