First Measurements for the Simultaneous Sorption of Difluoromethane and Pentafluoroethane Mixtures in Ionic liquids Using the Integral Mass Balance Method,Industrial & Engineering Chemistry Research

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First Measurements for the Simultaneous Sorption of Difluoromethane and Pentafluoroethane Mixtures in Ionic liquids Using the Integral Mass Balance Method
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2022-06-21 , DOI: 10.1021/acs.iecr.2c00497
Kalin R. Baca _{1,

2} , Darren P. Broom ₃ , Mark G. Roper ₃ , Michael J. Benham ₃ , Mark B. Shiflett _{1,

2}

Affiliation

Multicomponent absorption measurements are notoriously difficult both experimentally and analytically, which is why the literature is lacking information, even though the results are important for understanding real separation systems. In the case of designing a separation process for hydrofluorocarbon (HFC) refrigerant mixtures using an ionic liquid (IL), it is important to understand multicomponent effects; however, almost all published results are for single component HFC/IL systems. To address this challenge, new gravimetric microbalances utilizing the Integral Mass Balance (IMB) method have been designed by Hiden Isochema to efficiently and accurately measure multicomponent gas sorption in liquids with low volatility (e.g., ILs) and solids. The present work investigates the mixture absorption of difluoromethane (HFC-32) and pentafluoroethane (HFC-125) in two ILs (1-n-butyl-3-methylimidazolium tetrafluoroborate and 1-n-butyl-3-methylimidazolium hexafluorophosphate) at 298.15 K for the purpose of understanding HFC mixture/IL interactions. For the first time, these state-of-the-art instruments have allowed for the measurement of an HFC binary gas mixture in ILs that can be compared with existing single gas solubility measurements.

中文翻译：

使用积分质量平衡法首次测量离子液体中二氟甲烷和五氟乙烷混合物的同时吸附

众所周知，多组分吸收测量在实验和分析上都很困难，这就是文献缺乏信息的原因，尽管结果对于理解真正的分离系统很重要。在使用离子液体 (IL) 设计氢氟烃 (HFC) 制冷剂混合物的分离工艺时，了解多组分效应非常重要；然而，几乎所有公布的结果都是针对单组分 HFC/IL 系统的。为应对这一挑战，Hiden Isochema 设计了采用积分质量平衡 (IMB) 方法的新型重量微量天平，以有效和准确地测量低挥发性液体（例如，离子液体）和固体中的多组分气体吸附。298.15 K 的正丁基-3-甲基咪唑鎓四氟硼酸盐和 1-正丁基-3-甲基咪唑鎓六氟磷酸盐），以了解 HFC 混合物/IL 相互作用。这些最先进的仪器首次允许测量 ILs 中的 HFC 二元气体混合物，这可以与现有的单一气体溶解度测量值进行比较。

更新日期：2022-06-21

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