Ammonia Solubilities in Room-Temperature Ionic Liquids
Ammonia Solubilities in Room-Temperature Ionic Liquids
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DOI：
10.1021/ie061260d
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发表时间：
2007-02
影响因子：
4.2
通讯作者：
A. Yokozeki;M. Shiflett
中科院分区：
文献类型：
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作者：
A. Yokozeki;M. Shiflett
首次测定了氨在室温离子液体1-丁基-3-甲基咪唑六氟磷酸盐（[bmim][PF6]）、1-己基-3-甲基咪唑氯（[hmim][Cl]）、1-乙基-3-甲基咪唑二（三氟甲基磺酰基）亚胺（[emim][Tf2N]）和1-丁基-3-甲基咪唑四氟硼酸盐（[bmim][BF4]）中的溶解度。为本实验搭建了新的静态相平衡池。等温固定温度为~ 283、298、323、348和355 K，在环境温度下制备六种混合物组合物（从~ 10 mol %到85 mol %的氨）。观察到的溶解度很高：事实上，它们是文献中含有离子液体的室温混合物中最高的溶解度之一。观测到的压力-温度-成分（PTx）数据已经成功地与我们之前的状态方程（EOS）模型相关联。讨论了该系统在吸收式冷却/加热循环中的可能应用。
The solubilities of ammonia in the room-temperature ionic liquids 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), 1-hexyl-3-methylimidazolium chloride ([hmim][Cl]), 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([emim][Tf2N]), and 1-butyl-3-methylimidazolium tetrafluoroborate ([bmim][BF4]) have been measured for the first time. New static phase equilibrium cells have been constructed for the present experiment. Isothermally fixed temperatures are ∼283, 298, 323, 348, and 355 K, and six mixture compositions are prepared (from ∼10 mol % to 85 mol % ammonia) at the ambient temperature. The observed solubilities are high: in fact, they are among the highest ever reported in the literature for room-temperature mixtures that contain ionic liquids. Observed pressure−temperature−composition (PTx) data have been successfully correlated with our previous equation of state (EOS) model. Possible applications of the present systems to the absorption cooling/heating cycle have been discu...