College of Chemical Engineering, Zhejiang University of Technology, Huzhou 313299, China.
Int J Mol Sci. 2022 Sep 27;23(19):11401. doi: 10.3390/ijms231911401.
The increasing concentration of CO in the atmosphere is related to global climate change. Carbon capture, utilization, and storage (CCUS) is an important technology to reduce CO emissions and to deal with global climate change. The development of new materials and technologies for efficient CO capture has received increasing attention among global researchers. Ionic liquids (ILs), especially functionalized ILs, with such unique properties as almost no vapor pressure, thermal- and chemical-stability, non-flammability, and tunable properties, have been used in CCUS with great interest. This paper focuses on the development of functionalized ILs for CO capture in the past decade (2012~2022). Functionalized ILs, or task-specific ILs, are ILs with active sites on cations or/and anions. The main contents include three parts: cation-functionalized ILs, anion-functionalized ILs, and cation-anion dual-functionalized ILs for CO capture. In addition, classification, structures, and synthesis of functionalized ILs are also summarized. Finally, future directions, concerns, and prospects for functionalized ILs in CCUS are discussed. This review is beneficial for researchers to obtain an overall understanding of CO-philic ILs. This work will open a door to develop novel IL-based solvents and materials for the capture and separation of other gases, such as SO, HS, NOx, NH, and so on.
大气中 CO 浓度的增加与全球气候变化有关。碳捕集、利用与封存（CCUS）是减少 CO 排放和应对全球气候变化的重要技术。高效 CO 捕集新型材料和技术的开发受到全球研究人员的越来越多的关注。离子液体（ILs），特别是功能化 ILs，具有几乎没有蒸气压、热稳定性和化学稳定性、不燃性和可调节性质等独特性质，已被广泛应用于 CCUS 中。本文重点介绍了过去十年（2012~2022 年）用于 CO 捕集的功能化 ILs 的发展。功能化 ILs，或专用 ILs，是在阳离子或/和阴离子上具有活性位点的 ILs。主要内容包括三部分：阳离子功能化 ILs、阴离子功能化 ILs 和用于 CO 捕集的阴阳离子双功能化 ILs。此外，还总结了功能化 ILs 的分类、结构和合成。最后，讨论了功能化 ILs 在 CCUS 中的未来方向、关注点和前景。这篇综述有助于研究人员全面了解亲 CO 的 ILs。这项工作将为开发新型基于 IL 的溶剂和材料以捕集和分离其他气体（如 SO、HS、NOx、NH 等）开辟道路。
