High-performance absorption and regeneration of water vapor by choline chloride-based hydrophilic deep eutectic solvents (opens in new tab)

Moisture removal is essential in natural gas processing to prevent hydrate formation, corrosion, and operational issues in pipelines. In this work, a series of deep eutectic solvents (DESs) were synthesized by combining choline chloride with various hydrogen-bond donors: ethylene glycol (EG), triethylene glycol (TEG), tetraethylene glycol (TTEG), glycerol, and urea. Using a bubble-column system, their water vapor absorption capacities were evaluated and compared to TEG under controlled labora...