Vapor Pressure of water in mixtures with hydrophilic ionic liquids - A contribution to the design of processes for drying of gases by absorption in ionic liquids
Heym F, Haber J, Korth W, Etzold B, Jess A (2010)
Publication Type: Journal article
Publication year: 2010
Journal
Book Volume: 33
Pages Range: 1625-1634
Journal Issue: 10
DOI: 10.1002/ceat.201000146
Abstract
The low water vapor pressures of mixtures of water with the ionic liquids (ILs), [EMIM][EtSO4] and [BEIM][EtSO4], indicate that a process of gas dehydration by absorption in ILs might be an alternative to the classical absorption process with triethylene glycol (TEG). The activity coefficient for an infinite dilution of water in the IL (xIL → 1), which should be low for efficient dehydration, is only about 0.2 for [EMIM][EtSO4] compared to 0.6 for triethylene glycol. In contrast to TEG, losses by evaporation are excluded with ILs as solvents, because they have a negligible vapor pressure. The number of separation stages needed for the absorption in the IL and for the subsequent regeneration of the water-loaded IL is small, about six and eight, respectively. IL regeneration can be achieved by distillation of water out of the IL (e.g., at 120 °C) and stripping with ambient air, which is not possible in the case of TEG (chemical attack by O2). The low water vapor pressure of mixtures of water with ILs indicates that a process of gas dehydration by absorption in ILs might be an alternative to classical absorption processes. Losses by evaporation are excluded. The number of separation stages needed for this process is small. The IL-regeneration can be achieved by stripping with ambient air. © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Authors with CRIS profile
Involved external institutions
How to cite
APA:
Heym, F., Haber, J., Korth, W., Etzold, B., & Jess, A. (2010). Vapor Pressure of water in mixtures with hydrophilic ionic liquids - A contribution to the design of processes for drying of gases by absorption in ionic liquids. Chemical Engineering & Technology, 33(10), 1625-1634. https://doi.org/10.1002/ceat.201000146
MLA:
Heym, F., et al. "Vapor Pressure of water in mixtures with hydrophilic ionic liquids - A contribution to the design of processes for drying of gases by absorption in ionic liquids." Chemical Engineering & Technology 33.10 (2010): 1625-1634.
BibTeX: Download
Germany (DE)