Analysis of saline water desalination by directed solvent extraction using octanoic acid

• Feasibility study of extractive desalination using octanoic acid directional solvent • Experimental water partitioning data fitted to extended UNIQUAC model • Process severely pinched; contactor offers a maximum of only 3 theoretical stages. • Extractive desalination over 25-fold more capital intensive than reverse osmosis • Extractive desalination over 10-fold more energy intensive than reverse osmosis

Work ConsumpƟon in kWh/m3 Temperature in K Fig. 10. Work consumptions in kWh/m3 of salt-free water using values from Table 12 for dh = 0.05 m, ΔTapp = 5 K. The circles indicate ΠED , the triangles are Πpump, the squares ideal are Πs and the diamonds are Π. The light-dotted lines are guides for the eye. The thickdashed line represents the consumptions of a reverse osmosis process (3 kWh/m3) while the dashed-and-dotted line represents the work done by an ideal reverse osmosis process (~1 kWh/m3).