The emerging of ionic liquids (ILs) provides an efficient and sustainable way to separate and recover NH₃ due to their unique properties. However, the solid or highly viscous ILs are not suitable for traditional scrubbing. Therefore, an effective strategy was proposed by combining the protic ILs (PILs) with acidic H and low viscous ethylene glycol (EG) to form IL‐based deep eutectic solvents (DESs) for NH₃ absorption. The results indicated that these PIL‐based DESs not only have fast absorption rate, but also exhibit exceptional NH₃ capacity and excellent recyclability. The highest mass capacity of 211 mg NH₃/g DES was achieved by [Im][NO₃]/EG with molar ratio of 1:3, and was higher than all the reported ILs and IL‐based DESs, which was originated from multiple hydrogen bonding between acidic H and hydroxyl groups of the DESs and NH₃. This work will provide useful idea for designing IL‐based solvents for NH₃ separation applications.

中文翻译：

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具有多个氢键位的质子离子液体基深共熔溶剂，可有效吸收NH3

离子液体（IL）的出现，由于其独特的特性，为分离和回收NH ₃提供了一种有效且可持续的方式。但是，固体或高粘度IL不适合传统洗涤。因此，提出了一种有效的策略，将质子IL（PIL）与酸性H和低粘度乙二醇（EG）结合以形成用于吸收NH ₃的基于IL的深共熔溶剂（DES）。结果表明，这些基于PIL的DES不仅具有快速的吸收速率，而且还具有出色的NH ₃容量和出色的可回收性。通过[Im] [NO ₃ ]获得了最高的211 mg NH ₃ / g DES质量容量] / EG，摩尔比为1：3，高于所有已报道的IL和基于IL的DES，这是由于DES和NH _3的酸性H与羟基之间存在多个氢键。这项工作将为设计用于NH ₃分离应用的基于IL的溶剂提供有用的想法。