Phase Equilibrium Behavior of the Binary Systems CO_2+Nonadecane and CO_2+Soysolv and the Ternary System CO_2+Soysolv+Quaternary Ammonium Chloride Surfactant

摘要

Liquid phase and molar volume data were measured for the binary system CO_2+soysolv at (298.15,313.15,323.15,333.15,and 343.15) K and the ternary system CO_2+soysolv+quaternary ammonium chloride surfactant at (298.15,313.15,and 333.15) K,where the composition of soysolv to the surfactant is 99:1 wt% and 80:20 wt % on a CO_2-free basis.Data were collected stoichiometrically with a high-pressure Pyrex glass cell,where no sampling or chromatographic equipment is required.The accuracy of the experimental apparatus was tested with phase equilibrium measurements for the system CO_2+nonadecane at 313.15 K.A pressure-decay technique was used to calculate the mass of CO_2 loaded into the equilibrium section of the apparatus,and its accuracy was verified with a blank nitrogen experiment.The generated data show that CO_2 modified soysolv is an effective transport medium for the quaternary ammonium chloride surfactant.