(227f) Falling-Droplet Interfacial Mass Transport with [HMIm][Tf2n] and 1-Octene

Biphasic liquid-liquid systems are often encountered with ionic liquids involved with various applications in extractions, reactions, etc. However, little mass transfer data exists in the literature for any system involving ionic liquids, which impedes development and scale-up. This presentation will illustrate interfacial mass transport in a model biphasic system where 1-octene dissolves in falling droplets of 1-hexyl-3-methyl-imidazolium bis[trifluoromethylsulfonyl)amide ([HMIm][Tf₂N]). The physical, thermodynamic, and mass transport properties are highly concentration dependent. In addition, detailed studies using a high-speed camera have been used to investigate the droplet geometry and flight times. In addition to dimensionless-group correlation, the robust mass transfer model of Weatherley and Petera has been utilized to correlate and predict the mass transfer rates for any geometry and any hydrodynamic regime based upon limited physical property and thermodynamic data.