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

Authors: 
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.