Vapor-liquid equilibrium in the krypton + ethane system

Abstract

Vapor-liquid equilibrium measurements have been performed on mixtures of krypton + ethane at eleven temperatures, between 150 and 296 K, and at pressures up to 6.9 MPa. Five isotherms lie at temperatures where both components are subcritical and six were measured between their critical temperatures, up to the mixture critical point. Excess Gibbs energies were estimated at subcritical temperatures by using the methods of Barker and the maximum likelihood principle. The experimental results were compared with predictions of the Redlich-Kwong and Peng-Robinson equations of state. A perturbation theory treatment due to Gubbins et al. proved much better in achieving good agreement with experiment.

The Effect of Alkane Structure on Rates of Photoinduced C−H Bond Activation by Cp*Rh(CO)2 in Liquid Rare Gas Media: An Infrared Flash Kinetics Study

“…Specifically, lowering the solution temperature from −80 to −110 °C gave rise to a 20% increase in integrated absorption intensity . Kr/hydrocarbon vapor pressure data suggest that between −80 and −110 °C less than 2% of the dissolved alkane evaporates into the headspace of the cell, even in the case of ethane. , Variable-temperature 1 H NMR experiments using Kr/ethane solutions in a high-pressure NMR tube have confirmed this estimation. We therefore attribute the changes in band intensity to actual changes in hydrocarbon concentration.…”

Global corresponding states representation of the interfacial tension and capillary constant for the binary mixtures argon + krypton, methane + krypton, and krypton + ethane

“…Consistency tests were performed on six of the methane + krypton isotherms, the two lowest argon + krypton isotherms, and the lowest krypton + ethane isotherm. The two lowest isotherms from Nadler et al 26 for argon + krypton, the three lowest isotherms from Calado et al 20 for krypton + ethane, and the 115.77 K isotherm from Calado et al23 for krypton + ethane were also analyzed.…”