Isobaric vapor-liquid equilibrium (VLE) data were determined at the pressure of 20 kPa for the three binary mixtures composed of decane + p, o, m-xylene by using a recirculation type still. All the data passed the thermodynamic consistency test and no azeotropic behavior was observed. The experimental results were used as a basis to check the validity of two predictive models, the UNIFAC and the conductor-like screening model for realistic solvents (COSMO-RS). These new VLE data were also correlated with the van Laar, Wilson, the NRTL, and the UNIQUAC activity coefficient models. Crown Copyright (C) 2012 Published by Elsevier B.V. All rights reserved.