(179b) Measurement and Modeling of Vinyl Fluoride Solubility in Aqueous Lithium Bis(trifluoromethylsulfonyl)Imide Solutions

Minnick, D. L., University of Kansas
Gilbert, W. J. R., University of Kansas
Rocha, A. M., University of Kansas
Shiflett, M. B., University of Kansas
This presentation will highlight experimental (P-x) phase equilibrium results for the solubility of gaseous vinyl fluoride (VF) in lithium bis(trifluoromethylsulfonyl)imide (Li+Tf2N-) + water (H2O) solutions at pressures up to 40 bar. Vinyl fluoride solubility will be explored as a function of pressure and temperature at constant Li+Tf2N- loadings (20.15, 40.0, and 80.0 wt.%) and as a function of pressure and salt composition at constant temperatures (10oC, 30oC, and 100oC). The experimental results will demonstrate that VF is highly soluble in aqueous Li+Tf2N- salt solutions and that solubility is directly proportional to salt loading. A temperature dependent Peng-Robinson equation of state with a van der Waals 1-parameter mixing rule will be utilized to model the experimental results. In addition this presentation will highlight a few examples where Li+Tf2N- + H2O solutions could be utilized as a new solvent for fluoromonomer polymerizations and as a new working fluid for absorption-cooling applications.