Viscosities and carbon dioxide solubilities of guanidine carbonate and malic acid-based eutectic solvents

Abstract

Carbon capture and storage (CCS) is one of the technologies needed to reduce anthropogenic emissions of CO2 in the atmosphere. Protic ionic liquids (PILs) are potential nonaqueous solvents that can combine the benefits of ionic liquids (ILs) and deep eutectic solvents (DESs) to make the carbon capture process more sustainable. In the present study, the viscosities of six eutectic-based solvents have been measured within a temperature range of 303.2-330.2 K and have been modeled using a Vogel-Fulcher-Tammann (VFT)-type equation. The results showed that guanidium malate-based eutectic solvents have significantly lower viscosities than most other deep eutectic solvents. Additionally, CO2 solubi..