Analysis of temperature effect in the CO2 absorption using a deep eutectic solvent: An in silico approach.

The excess level of carbon dioxide in the atmosphere has contributed a lot to global warming, occasioning several damages to the planet. Therefore, it is urgent to find ways to capture this gas. Then, the present work analyzed the temperature effect in CO 2 absorption through deep eutectic solvents (DESs) based on urea and choline chloride using an in silico approach. The Molecular Dynamics (MD) simulations indicated that the increased temperature reduced the interaction potential of carbon dioxide molecules with the DESs components, indicating that the absorption process is more favorable at 303 K. On the other hand, the Noncovalent Interactions (NCI) simulations suggest that the increased temperature reduced the strong attractions and increased repulsive interactions between the carbon dioxide molecules with the solvent analyzed. Therefore, both in silico approaches suggest that the carbon dioxide absorption is more indicated at 303 K. [Display omitted] • Deep Eutectic Solvents (DESs) are utilized in the CO 2 absorption process. • The temperature effect reduced the hydrogen bond number between the CO 2 molecules with the urea specie. • The CO 2 molecules have a higher interaction potential with the DESs analyzed at 303 K. • The CO 2 absorption process is more indicated at 303 K. [ABSTRACT FROM AUTHOR]