A new prediction methodology by using the non-ideal adsorbed solution theory (NIAST) coupled with the Dubinin-Astakhov (DA) equation is proposed for volatile organic compounds (VOCs) (acetone, n-hexane, toluene, methanol and n-decane) adsorption equilibria under supercritical carbon dioxide conditions at temperatures from 313 to 353 K and at pressures from 4.2 to 15.0 MPa. Pure components adsorption data of the each adsorbate were measured by using a gravimetric method, and these pure component data were used to predict the binary systems. The proposed DA-NIAST model could provide accurate predictions at a wide range of temperature and pressure in comparison with the conventional methodologies by combination of the ideal adsorbed solution theory (IAST) and the Langmuir equation. (C) 2014 Elsevier B.V. All rights reserved.