High-Pressure Phase Equilibria for the Carbon Dioxide + 1-Propanol System

Abstract

Isothermal (P, T, x, y) data have been measured for the binary system carbon dioxide + 1-propanol at temperatures from (293.15 to 353.15) K. The pressure range under investigation was between (0.61 and 12.64) MPa. The new experimental results are discussed and compared with available literature data. Measured vapor−liquid equilibria (VLE) data and literature data for the carbon dioxide + 1-propanol system were modeled with a general cubic equation of state (GEOS) using classical van der Waals (two-parameters conventional mixing rule, 2PCMR) mixing rules. A single set of interaction parameters, representing well the critical pressure maximum (CPM) and the temperature of the upper critical end point (UCEP), was used to calculate the global phase behavior in the binary mixture carbon dioxide + 1-propanol in a wide range of temperatures [(293.15 to 426.68) K]. The VLE data are satisfactorily predicted for engineering purposes.

Measurement and modeling of high-pressure (vapour+liquid) equilibria of (CO2+alcohol) binary systems

“…Mole fractions of the liquid phase measured for the (CO 2 + 1-propanol) system at temperatures of (313, 323, and 333) K, and at a pressure range of (3 to 6) MPa exhibited positive differences <10% from values of Secuianu et al [10] and Yaginuma et al [12]. For the vapour phase, major differences were negative and <3% of the results from Suzuki et al [6].…”

“…For the (CO 2 + ethanol) binary system, experimental high-pressure (vapour + liquid) equilibria (VLE) data have been extensively reported at temperatures from (283 to 373) K and pressure range of (0.5 to 14.3) MPa by several authors [2,[6][7][8][9]. Experimental information selected from the literature for the high-pressure VLE of the four systems measured in this contribution: (CO 2 + 1-propanol) [6,[10][11][12][13], (CO 2 + 2-methyl-1-propanol) [14][15][16], (CO 2 + 3-methyl-1-butanol) [14,[16][17][18], and (CO 2 + 1-pentanol) [19][20][21][22] is summarized in table 1.…”

High-pressure phase equilibria in the (carbon dioxide+1-hexanol) system

“…In continuation of our previous studies [2][3][4][5][6][7][8][9][10][11][12] on the (carbon dioxide + alcohols) systems at high pressures, this paper presents the results for the (carbon dioxide + 1-hexanol) binary mixture. The goals of this work were to add new experimental data and to represent the complex phase behaviour of this system with a simple model, using a single set of interaction parameters.…”

“…Instead of correlating the experimental data, we used a semi-predictive approach [2][3][4][5][6][7][8][9][10][11][12] [8][9][10], this procedure leads to physically correct results, even if with higher errors in bubble-point pressure. We obtained a parameter set by a trial and error method in order to reproduce reasonably the minimum and liquid-liquid part of the critical curve.…”

“…The apparatus used in this work is based on the static-analytical method with liquidand vapour-phase sampling. The procedure is the same as in our previous papers [2][3][4][5][6][7][8][9][10][11][12]. The entire internal loop of the apparatus including the equilibrium cell was rinsed several times with carbon dioxide.…”