Up to now, many kinds of deep eutectic solvents (DESs) were investigated for the capture of acidic gases from flue gases. In this review, non-functionalized and functionalized DESs, including binary and ternary DESs, for SO₂, CO₂ and NO capture, are summarized based on the mechanism of absorption, physical interaction or chemical reaction. New strategies for improving the absorption capacity are introduced in this review. For example, a third component can be introduced to form a ternary DES to suppress the increase in viscosity and improve the CO₂ absorption capacity. DESs, synthesized with halogen salt hydrogen bond acceptors (HBAs) and functionalized hydrogen bond donors (HBDs), can be used for the absorption of SO₂ and NO with high absorption capacities and low viscosities after absorption, due to physicochemical interaction between gases and DESs. Emphasis is given to introducing the absorption capacities of acidic gases in these DESs, the mechanism of the absorption, and the ways to enhance the absorption capacity.

中文翻译：

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用深共晶溶剂从烟道气中捕获酸性气体

迄今为止，人们研究了多种用于从烟道气中捕集酸性气体的低共熔溶剂（DESs）。在这篇综述中，基于吸收、物理相互作用或化学反应的机制，总结了用于SO ₂、CO ₂和NO 捕获的非功能化和功能化DES，包括二元和三元DES 。本综述介绍了提高吸收能力的新策略。例如，可以引入第三组分形成三元DES以抑制粘度增加并提高CO ₂吸收能力。DESs 由卤盐氢键受体 (HBA) 和功能化氢键供体 (HBDs) 合成，可用于吸收 SO ₂由于气体和 DES 之间的物理化学相互作用，NO 具有高吸收能力和吸收后的低粘度。重点介绍了这些DESs中酸性气体的吸收能力、吸收机制以及提高吸收能力的方法。