Adsorption equilibria of volatile organic compounds (VOCs: n-octane, propylene glycol monomethyl ether, ethanol, and 2-propanol) on activated carbon were measured using the fixed-bed method under supercritical carbon dioxide (scCO(2)) conditions at 313-353 K and 10.0-15.0 MPa. The measured adsorption isotherms strongly depended on the properties of the VOCs together with the CO2 density. The adsorption equilibria were correlated using the Dubinin-Astakhov (DA) equation with two fitting parameters: E-VOC (the interaction energy between VOC and adsorbent) and W-0.VOC (the saturated adsorption capacity of VOC). The fitting parameters provided insight into the adsorption phenomena of VOCs in scCO(2) in terms of the CO2 density and properties of VOCs. (C) 2018 Elsevier B.V. All rights reserved.