Abstract
Octane was considered to be a potential entrainer for the recovery of spent sulfuric acid by heterogeneous azeotropic distillation. The vapor–liquid equilibria (VLE) data were determined for octane + ethanol, octane + water + ethanol, and octane + sulfuric acid + water + ethanol systems at (30, 60, 90, and 101.3) kPa using the ebulliometric method. The VLE data were used to regress the electrolyte nonrandom two-liquid interaction parameters with the help of Aspen Plus for pairs: C8H18–C2H6O, C8H18–H2O, H2SO4–C2H6O, C2H6O–[H3O]+:[HSO4]−, C2H6O–[H3O]+:[SO4]2–, C8H18–[H3O]+:[HSO4]−, and C8H18–[H3O]+:[SO4]2–. The correlation fitted the experimental data well for all the systems. The maximum absolute deviation and average absolute deviation for temperature for the systems are 0.86 K and 0.26 K, respectively.
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