Author
J. M. Prausnitz
Bio: J. M. Prausnitz is an academic researcher. The author has contributed to research in topics: Phase (matter) & UNIQUAC. The author has an hindex of 1, co-authored 1 publications receiving 306 citations.
Topics: Phase (matter), UNIQUAC
Papers
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TL;DR: In this paper, three different excess Gibbs free energy models are evaluated to predict ternary liquid-phase behavior in systems that contain ionic liquids (ILs) from binary measurements.
Abstract: Characterization of liquid−liquid equilibrium (LLE) in systems that contain ionic liquids (ILs) is important in evaluating ILs as candidates for replacing traditional extraction and separation solvents. Although an increasing amount of experimental LLE data is becoming available, comprehensive coverage of ternary liquid-phase behavior via experimental observation is impossible. Therefore, it is important to model the LLE of mixtures that contain ILs. Experimental binary and ternary LLE data that involve ILs can be correlated using standard excess Gibbs energy models. However, the predictive capability of these models in this context has not been widely studied. In this paper, we study the effectiveness with which excess Gibbs energy models can be used to predict ternary LLE solely from binary measurements. This is a stringent test of the suitability of various models for describing LLE in systems that contain ILs. Three different excess Gibbs free energy models are evaluated: the non-random two-liquid (N...
213 citations
TL;DR: In this paper, an analytical solution, COSMOSPACE, to the statistical thermodynamics of a model of pairwise interacting surfaces, was presented, which was initially developed for the a priori prediction model COSMO-RS in an implicit form.
Abstract: An analytical solution, COSMOSPACE, to the statistical thermodynamics of a model of pairwise interacting surfaces, is presented. This solution was initially developed for the a priori prediction model COSMO-RS in an implicit form. A comparison of COSMOSPACE with UNIQUAC and with the quasi-chemical theory of Guggenheim reveals the conditions under which the models yield similar results and when they differ very considerably. It is shown that COSMOSPACE is in extremely good agreement with Monte-Carlo simulations for some lattice fluids (where UNIQUAC is particularly poor). The ability of COSMOSPACE to provide good fits to experimental data is shown for three binary mixtures including ethanol-cyclohexane, where UNIQUAC incorrectly predicts a liquid-liquid phase separation.
140 citations
TL;DR: Urbanchuk et al. as discussed by the authors showed that using an ionic liquid (1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) can easily separate 1-butanol from water.
116 citations
TL;DR: In this article, a surface crosslinked poly(vinyl alcohol) membrane using glutaraldehyde as crosslinking reagent was used for dehydration of ethylene glycol (EG) aqueous solution by pervaporation.
107 citations
TL;DR: The design feasibility of using ionic liquids as solvents in liquid–liquid extractions for separating organic compounds from dilute aqueous solutions, and the ability to predict the observed ternary liquid– liquid equilibrium behavior using selected excess Gibbs energy models is explored.
96 citations