胆碱类低共融溶剂在CO2捕集与分离中的应用

胆碱类低共融溶剂是一种新型的离子液体。它不仅具有传统离子液体的优点，还具有价格低廉、低毒、生物可降解等优势。对胆碱类低共融溶剂在CO₂捕集与分离中所涉及的物理性质，如气体的溶解度、CO₂的吸收-解吸、密度、稳定性、黏度和表面张力等进行考察，并分析了胆碱类低共融溶剂的结构对各物性的影响。通过与传统离子液体的对比，胆碱类低共融溶剂在CO₂捕集与分离中的应用具有一定的优势，如CO₂溶解度高，黏度低。然而，胆碱类低共融溶剂在气体的选择性分离、表面张力等的研究还不足，且热稳定性方面还存在瓶颈，因此，其在CO₂捕集和分离中的应用还有待进一步探讨。

Application of choline-based deep eutectic solvents in CO2 capture and separation

Choline-based deep eutectic solvents (DESs) are a new class of ionic liquids. With similar properties to ionic liquids, choline-based DESs have the advantages of easy synthesis, low price, low toxicity and biodegradability. In this work, the properties of choline-based DESs related to CO₂ capture and separation were investigated, such as gas solubility, CO₂ absorption-desorption, density, thermal stability, viscosity and surface tension. The influence of the structure of choline-based DESs on their properties were analyzed. The comparison of choline-based DESs with traditional ionic liquid showed that choline-based DESs could be used as absorbents for CO₂ capture and separation due to high CO₂ solubility and low viscosity. However, more research needs to be done before commercial application, for example, CO₂ selectivity compared to other components in gas mixtures, surface tension as well as thermal-stability.