High‐pressure vapor‐liquid equilibria in the propane‐1‐propanol system

Abstract

High-pressure isothermal vapor liquid equilibrium data were measured for the propane-1-propanol system at 81.6, 105.2, and 120.l"C in ( Skjold-Jorgenson, 19861, Peng-Robinson EOS (Peng Robinson, 1976)

A new high-pressure vapour–liquid equilibrium apparatus

“…For the propane + 1-propanol system there is fair agreement with the data of Mühlbauer and Raal [2], except for vapour phase compositions at 378.15 K (Fig. 10).…”

“…A comparison with literature data is also shown in Figs. 10 and 11 for the propane + 1-propanol system at 378.15 K and 393.15 K respectively, a system for which accurate measurement of vapour compositions (particularly) in the low-pressure region presents a considerable challenge [2,21].…”

“…On switching to the flushing position, the sample was flushed directly into an evacuated jet mixer for evaporation and sample homogenization. The jet mixers, developed in our group [2], produced an accelerated, swirling (recirculating) motion in the machined interior cavity which had rounded corners to eliminate any stagnant regions. The jet mixer was kept at a temperature higher than that of the equilibrium cell and air bath with three 100 W heater cartridges, embedded symmetrically in its wall.…”

“…The gaseous component was then forced into the cell (either under bottle pressure or using a compression device) to obtain the desired pressure. To obtain pressures greater than the propane bottle pressure, a purpose-built compressor device [1,2] was used. With the refrigeration capability for the air bath it is also possible to obtain pressures well above the bottle pressure by introduction of the liquid component saturated with gaseous component at low temperature, and subsequent heating of the cell to higher temperature.…”

“…The equipment design incorporates features that we have developed from previous studies within our research group [1][2][3], as well as some adopted from literature.…”