Abstract
The solubilities of CO2 in three kinds of deep eutectic solvents, (choline chloride+phenol), (choline chloride+diethylene glycol) and (choline chloride+triethylene glycol), were determined at temperatures ranging from 293.15K to 323.15K under pressures up to 600.0kPa using isochoric saturation method. The mole ratios of choline chloride to phenol were selected as 1:2, 1:3 and 1:4, the others as 1:3 and 1:4. Henry’s constants and thermodynamic properties such as standard Gibbs free energy, enthalpy, and entropy changes of CO2 solvation were calculated from the correlation of solubility data. Results revealed that the solubility of CO2 increased with increasing pressure and decreased with increasing temperature. The enthalpies of solution were negative at all conditions.
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