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Prediction of VOCs adsorption equilibria on activated carbon in supercritical carbon dioxide over a wide range of temperature and pressure by using pure component adsorption data: Combined approach of the Dubinin-Astakhov equation and the non-ideal adsorbed solution theory (NIAST)

Author:
Ushiki, Ikuo  Ota, Masaki  Sato, Yoshiyuki  Inomata, Hiroshi  


Journal:
FLUID PHASE EQUILIBRIA


Issue Date:
2014


Abstract(summary):

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.


Page:
293---305


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