Phase behavior of the ternary 1-hexyl-3-methylimidazolium tetrafluoroborate plus carbon dioxide plus methanol system

作者：Kroon Maaike C; Florusse Louw J; Peters Cor J^*

来源：Fluid Phase Equilibria, 2010, 294(1-2): 84-88.

DOI：10.1016/j.fluid.2010.02.005

• Phase behavior
• Ternary system
• Ionic liquid
• 1-Hexyl-3-methylimidazolium
• tetrafluoroborate
• Carbon dioxide
• Methanol

The phase behavior of the ternary system consisting of the ionic liquid (IL) 1-hexyl-3-methylimidazolium tetrafluoroborate ([hmim(+)][BF(4)(-)]) + carbon dioxide (CO(2)) + methanol is studied experimentally using the Cailletet apparatus. Experimental data for all phase transitions within a temperature range of 254.64-348.17 K, a pressure range of 2.102-13.189 MPa and a CO(2) fraction range of 40.20-69.98 mol% are collected, while the ratio [hmim(+)][BF(4)(-)]:methanol is kept constant at 1:19. Only at CO(2) concentrations between 66.47 and 68.04% the usual 'two-phase'-'three-phase'-'two-phase'-'one-phase' transition upon CO(2) pressure increase is found. At lower and higher CO(2) fractions, the number of phase transitions observed is lower. All observed phase transitions do not involve criticality.

• 出版日期2010-7-15