Distillable Protic Ionic Liquid 2-(Hydroxy)ethylammonium Acetate (2-HEAA): Density, Vapor Pressure, Vapor鈥揕iquid Equilibrium, and Solid鈥揕iquid Equilibrium
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- 作者：Anne Penttil盲 ; Petri Uusi-Kyyny ; Ville Alopaeus
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2014
- 出版时间：December 10, 2014
- 年：2014
- 卷：53
- 期：49
- 页码：19322-19330
- 全文大小：333K
- ISSN：1520-5045
文摘
Recently it has been found that certain ionic liquids (ILs) have notable vapor pressures (Earle et al. Nature 2006, 439, 831鈥?34). These ILs may be important in various novel technologies, but they may also be important in postcombustion carbon captures as side products. In this work a distillable protic ionic liquid (PIL) 2-(hydroxy)ethylammonium acetate (2-HEAA) was prepared from monoethanolamine (MEA) and acetic acid (HAc) and it was purified with a Vigreaux type distillation column under vacuum. Density was measured for the MEA + 2-HEAA and HAc + 2-HEAA systems with a DMA HP densimeter from 293 to 363 K. The Redlich鈥揔ister polynomial was used to model the density data. Vapor鈥搇iquid equilibrium was measured for the H2O + HAc + 2-HEAA system with a static total pressure apparatus at 347 K. Solid鈥搇iquid equilibrium was measured for the H2O + HAc + 2-HEAA system with a visual method. The NRTL activity coefficient model was used to model the vapor鈥搇iquid and solid鈥搇iquid equilibrium data.