GAS-CHROMATOGRAPHIC DETERMINATION OF BINARY ADSORPTION-ISOTHERMS

Reversed-flow gas chromatography is a dynamic method useful for measur ing adsorption isotherms at low concentrations. This method based on t he mass-balance equations is useful for evaluating the adsorption isot herms because it gives model-independent results. The method is descri bed and evaluated for the determination of the adsorption isotherms of two components in gas-solid systems. The following adsorbents were in cluded in the study: iron oxide, zinc oxide, chromium oxide, lead oxid e and titanium oxide. The adsorption of two significant aromatic hydro carbons (benzene and toluene) was investigated in the presence of an i norganic gas (nitrogen dioxide). (C) 1998 Elsevier Science B.V.