Investigation into the Effective Chemical Structure of Metal-Containing Ionic Liquids for Oxygen Absorption
Investigation into the Effective Chemical Structure of Metal-Containing Ionic Liquids for Oxygen Absorption
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DOI：
10.1021/acs.iecr.9b03467
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发表时间：
2019-12
影响因子：
4.2
通讯作者：
Atsushi Matsuoka;Eiji Kamio;H. Matsuyama
中科院分区：
文献类型：
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作者：
Atsushi Matsuoka;Eiji Kamio;H. Matsuyama
为了控制用作 O2 吸收剂的 Co(II)(salen) 基含金属离子液体 (MCIL) 的性能，研究了 MCIL 化学结构对粘度、O2 吸收量以及 O2 和 MCIL 之间络合物形成反应速率的影响。通过将不同烷基链长度的鏻阳离子和N-甲基甘氨酸或双(三氟甲基磺酰基)亚胺阴离子组成的配体IL与Co(salen)配位，系统地改变了MCIL的化学结构。一系列研究表明，分子间氢键和烷基链的缠结会影响 MCIL 的粘度。此外，小MCIL可提供大的O2吸收量、高O2/N2吸收选择性和快速的O2吸收反应。通过对 MCIL 整体 O2 吸收率的数值计算，可以明确主要的传质阻力是 O2-MCIL 复合物在 MCIL 中的扩散。根据这些结果，设计标准...
To control the properties of Co(II)(salen)-based metal-containing ionic liquids (MCILs) for use as O2 absorbents, the effects of the MCIL chemical structures on viscosity, O2 absorption amount, and complex-formation reaction rates between O2 and MCILs were investigated. The chemical structures of the MCILs were systematically changed by coordinating the ligand ILs composed of phosphonium cations with different alkyl-chain lengths and N-methylglycinate or bis(trifluoromethylsulfonyl)imide anion to Co(salen). A series of investigations indicated that intermolecular hydrogen bonding and entanglement of the alkyl chain affected the viscosity of the MCILs. Furthermore, small MCILs afforded large O2 absorption amounts, high O2/N2 absorption selectivities, and fast O2 absorption reaction. From a numerical calculation of the overall MCIL O2 absorption rate, it was clarified that the dominant mass-transfer resistance was the diffusion of the O2–MCIL complex in the MCIL. Based on these results, the design criteria ...