ABSTRACT

Carbon dioxide capture from industrial gases (i.e., flue gases and natural gas) is a crucial process for reducing the environmental impacts of acid gas emissions. However, carbon dioxide capture that is generally performed by amine-based solvent faces operational problems due to the properties of the solvent. Recently, ionic liquids (ILs) have emerged as promising candidates for replacing the amine-based solvent due to their low vapor pressure (near-zero), high stability, as well as tunable structure and properties. The functionalized ILs are considered superior in terms of their ease of regeneration as well as high absorption capacity and selectivity toward CO₂. Combining the functionalized ILs with membrane processes has opened up a new horizon in CO₂ capture technology. This review comprehensively summarizes the latest developments in the application of ionic liquid membranes (ILMs) for CO₂ capture, including supported ILMs (SILMs), poly-ILMs (PILMs), polymer-IL composite membranes, mixed-matrix-membranes, with special attention to ILM contactors. The absorption mechanisms of CO₂ in the ILs are pictured and discussed.

摘要

从工业气体（即烟道气和天然气）中捕获二氧化碳是减少酸性气体排放对环境影响的关键过程。然而，由于溶剂的性质，通常由胺类溶剂进行的二氧化碳捕获面临操作问题。最近，离子液体（ILs）由于其低蒸气压（接近零）、高稳定性以及可调节的结构和性能而成为替代胺基溶剂的有希望的候选者。功能化的离子液体被认为在易于再生以及高吸收能力和对 CO ₂的选择性方面具有优势。将功能化离子液体与膜工艺相结合开辟了 CO _{2的新视野} 捕获技术。_{本综述全面总结了离子液体膜（ILMs）在CO 2}捕集中的最新应用 ，包括负载型离子液体膜（SILMs）、聚-ILMs（PILMs）、聚合物-IL复合膜、混合基质-膜，具有特殊的注意 ILM 接触器。 描述并讨论了离子液体中CO ₂的吸收机制。