Kalin R. Baca, Karim Al-Barghouti, Ning Wang, Madelyn G. Bennett, Lucia Matamoros Valenciano, Tessie L. May, Irene V. Xu, Max Cordry, Dorothy M. Haggard, Abigail G. Haas, Ashley Heimann, Abby N. Harders, Hannah G. Uhl, Diego T. Melfi, Andrew D. Yancey, Rajkumar Kore, Edward J. Maginn, Aaron M. Scurto and Mark B. Shiflett*,
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引用次数: 0
摘要
本综述讨论了用于分离碳氟化合物制冷剂混合物的离子液体研究。碳氟化合物制冷剂于 1928 年由 Thomas Midgley Jr.发明,是一类独特的工作流体,可用于包括制冷在内的多种用途。碳氟化合物制冷剂可分为四代:氯氟化碳、氢氯氟化碳、氢氟化碳和氢氟烯烃。每一代制冷剂都解决了上一代制冷剂的一个关键问题;然而,每一代新制冷剂都依赖于更复杂的混合物,这些混合物通常是各向同性、近共沸或共沸的。所使用制冷剂的复杂性以及许多制冷剂在混合时会形成共沸物的事实,使得制冷剂在报废时的处理极为困难。目前,进入市场的制冷剂中只有不到 3% 得到回收利用。这是因为制冷剂回收市场缺乏技术,无法将这些复杂的共沸制冷剂混合物分离成不同的成分,以便有效地再利用、回收,并在必要时重新使用。随着制冷剂回收和再生市场的不断发展,对分离技术的需求也越来越大。离子液体作为萃取蒸馏过程中的夹带剂,有望分离共沸制冷剂混合物。自 2000 年代初以来,人们一直在研究离子液体与制冷剂在此方面的应用。本综述将全面总结物理性质测量、状态方程建模、分子模拟、分离技术以及将离子液体单元化的独特材料,以开发基于离子液体的共沸制冷剂混合物分离工艺。
Ionic Liquids for the Separation of Fluorocarbon Refrigerant Mixtures
This review discusses the research being performed on ionic liquids for the separation of fluorocarbon refrigerant mixtures. Fluorocarbon refrigerants, invented in 1928 by Thomas Midgley Jr., are a unique class of working fluids that are used in a variety of applications including refrigeration. Fluorocarbon refrigerants can be categorized into four generations: chlorofluorocarbons, hydrochlorofluorocarbons, hydrofluorocarbons, and hydrofluoroolefins. Each generation of refrigerants solved a key problem from the previous generation; however, each new generation has relied on more complex mixtures that are often zeotropic, near azeotropic, or azeotropic. The complexity of the refrigerants used and the fact that many refrigerants form azeotropes when mixed makes handling the refrigerants at end of life extremely difficult. Today, less than 3% of refrigerants that enter the market are recycled. This is due to a lack of technology in the refrigerant reclaim market that would allow for these complex, azeotropic refrigerant mixtures to be separated into their components in order to be effectively reused, recycled, and if needed repurposed. As the market for recovering and reclaiming refrigerants continues to grow, there is a strong need for separation technology. Ionic liquids show promise for separating azeotropic refrigerant mixtures as an entrainer in extractive distillation process. Ionic liquids have been investigated with refrigerants for this application since the early 2000s. This review will provide a comprehensive summary of the physical property measurements, equations of state modeling, molecular simulations, separation techniques, and unique materials unitizing ionic liquids for the development of an ionic-liquid-based separation process for azeotropic refrigerant mixtures.
期刊介绍:
Chemical Reviews is a highly regarded and highest-ranked journal covering the general topic of chemistry. Its mission is to provide comprehensive, authoritative, critical, and readable reviews of important recent research in organic, inorganic, physical, analytical, theoretical, and biological chemistry.
Since 1985, Chemical Reviews has also published periodic thematic issues that focus on a single theme or direction of emerging research.