Homologue-paired liquids as special non-ionic deep eutectic solvents for efficient absorption of SO

Low-viscous homologue-paired liquids (HPLs) are designed and employed as special non-ionic deep eutectic solvents for selective separation of SO 2 from CO 2 and N 2 . The HPLs are found to have excellent inherent properties ( e.g. , low cost, volatility and viscosity), high absorption capacity, fast absorption rate, and moderate Lewis acid-base interaction with SO 2 . Regeneration experiments are done to show their excellent recyclability, and industrial desulfurization is exemplified in a small column with suitable parameters to show their potential as SO 2 absorbents. This work develops low-viscous homologue-paired liquids as a special kind of non-ionic deep eutectic solvent for efficient capture of SO 2 .