Solubility of carbon dioxide in Triton X-100 – Water – ethaline solvent mixtures at 298.15 K

Abstract

Deep eutectic solvents (DESs) and liquid surfactants have been known as safe and low risk materials to prepare appropriate media for various physical and chemical processes. These compounds have demonstrated manifest properties while playing the solvent role. The solubility of carbon dioxide (CO2) were determined in aqueous solutions Triton X-100 at 298.15 K as a function of CO2 pressure. Also, ternary solvent mixtures including Triton X-100 as an additive in aqueous solutions of ethaline were evaluated for the capacity of CO2 capture. Triton X-100, DES, and water showed a three-component liquid–liquid equilibrium with a limited single-phase region. The determination of CO2 solubility in the single-phase region of ternary mixtures revealed that the Triton X-100 as an additive increases the solubility of CO2 in the aqueous solutions of ethaline. The effect of Triton X-100 on CO2 solubility in binary mixtures of ethaline and water appeared differently based on the concentration of Triton X-100.