Facile Synthesis of Alkaline Ternary Deep Eutectic Solvents: Application for Effective and Reversible SO 2 Uptake

作者：Jiawen Li, Chao Wang, Haoyu Wu, Jiaxuan Zhang, Ming Zhang, Qian Zhu, Yiqun Fan, Hui Liu, Wenshuai Zhu · 发表于：Energy & Fuels · 年份：2023 · DOI：10.1021/acs.energyfuels.3c01017 · 被引用次数：8 · 研究领域：Ionic liquids properties and applications、Chemical Synthesis and Reactions、Gas Sensing Nanomaterials and Sensors

Effective capture and recycling of SO 2 are of great significance to environmental protection and high-value utilization. Herein, a promising strategy for effective and reversible capture of SO 2 was proposed using alkaline ternary deep eutectic solvents (DESs) as absorbents. The absorbents consisting of choline chloride (ChCl), diethylenetriamine (DETA), and ethylene glycol (EG) with different molar ratios show a relatively lower viscosity and higher thermal stability. Here, ChCl/DETA/EG (1:1:2) could take out 0.87 g of SO 2 /g of solvent at 298.15 K and 1.0 bar. Surprisingly, a SO 2 absorption capacity of 0.53 g/g could still be gained under a lower SO 2 partial pressure (0.2 bar). Besides, the prepared absorbents also exhibit rapid equilibration time and satisfied reusability, providing a potential alternative strategy for the effective and reversible elimination of SO 2 .