The mass transfer efficiency of an extractive distillation column was compared for the ionic liquid 1-Ethyl-3-methylimidazolium ethyl sulfate and ethylene glycol as solvents for the separation of water-ethanol. A rate based model was established in ASPEN Plus. Tray efficiency profiles along the column showed a reduction in mass transfer performance when the ionic liquid was used due to its relatively high viscosity. Indeed, this reduction was more pronounced when the liquid phase viscosity was increased by means of a higher solvent-to-feed ratio. Finally, a sharp decline in efficiency was observed at high liquid phase viscosities, approaching the flooding point.
|Title of host publication||Proceedings of Distillation Absorption 2010 (DA2010), september 12-15 2010, Eindhoven, The Netherlands|
|Editors||A.B. Haan, de, H. Kooijman, A. Górak|
|Place of Publication||Eindhoven, The Netherlands|
|Publication status||Published - 2010|