Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
202363 | Fluid Phase Equilibria | 2014 | 13 Pages |
•A new predictive model for VOCs adsorption equilibria in supercritical CO2 was proposed.•The model was developed by using the Dubinin–Astakhov equation and the non-ideal solution theory.•VOC and CO2 pure adsorption data were measured with a gravimetric method.•The proposed model demonstrated accurate prediction compared to conventional models.
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.
Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide