High-temperature vapour–liquid equilibrium for the (water + alcohol) systems and modelling with SAFT-VR: 2. Water-1-propanol

Accurate vapour–liquid equilibrium (VLE) measurements of binary mixtures involving water and linear aliphatic alcohols, an important alternative source of energy, are needed for the design of industrial processing of these compounds. In this paper, VLE measurements for the (water + 1-propanol) system were carried out over the temperature range 403.2 K to 423.2 K and pressures up to 0.72 MPa using a flow apparatus.The Statistical Associating Fluid Theory for potentials of Variable Range (SAFT-VR) was used to model the system. The experimental results are accurately reproduced with this approach, using binary interaction parameters slightly modified from those previously used for the (water + ethanol) system.

► Experimental VLE data for water-1-propanol system at high temperaturewere obtained.
► A flow apparatus previously validated with water + ethanol mixtures was used.
► Temperature and pressure ranges were 403.2 to 423.2 K and pressures up to 0.72 MPa.
► Vapour pressure data for pure 1-propanol is reported for the same temperature range.
► SAFT-VR was used to correlate the data with success.