Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

Anthropogenic CO2 emissions into the atmosphere are responsible for the global warming, therefore, it is essential to reduce these emissions at source. Recently, deep eutectic solvents (DESs) have shown great potential to absorb the CO2. In the current study,15 different types of amine and glycol based deep eutectic solvents were synthesized and investigated for CO2absorption.In general, amine based solvents have shown higher CO2absorption as compared to glycol based solvents. In particular, the highest CO2 absorption was observed for tetrabutyl ammonium bromide and methyldiethanol amine (TBAB/4MDEA) system having CO2 solubility of 0.29 (mol CO2/mol solvent) at 10 bar and 303.15 K. Thermophysical properties of all synthesized DES were estimated using modified Lydersen-Joback-Reid method and Lee-Kesler mixing rule. Experimental CO2 solubility data was well fitted using NRTL and PENG-ROB thermodynamic models.Apart, CO2 solubility data was correlated with Henry's law and Henry's constant was calculated for all DESs. Kinetic modelling of CO2 absorption in DESs was also studied and rate constants were evaluated.